Collection: Bearings - Single Row Ball

Bearings -> Single Row Ball
ID (d) O.D. (D) Width (B) Inner Ring Width (Bn) Flange Diameter (DF) Flange Width (BF) Indicative
Image
Single Row Ball Bearings - 4x8x3 mm Flanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
O.D. (D)
8.000
mm
+ 0.000 / - 0.007
(Equiv. 0.315 in.)
Width (B)
3.000
mm
+ 0.000 / - 0.120
(Equiv. 0.118 in.)
Flange Diameter (DF)
9.200
Flange Width (BF)
0.600
Single Row Ball Bearings - 4x8x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: P6   
Category: Bearings - Single Row Ball - Flanged
Part Number: FMR84A-ZZ-MC3-JP6 (PK-50)
Contact Us | Special Order Only - Please contact us if you need a large quantity
ID (d) O.D. (D) Width (B) Inner Ring Width (Bn) Indicative
Image
Single Row Ball Bearings - 4x8x3 mm Flanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
O.D. (D)
8.000
mm
+ 0.000 / - 0.007
(Equiv. 0.315 in.)
Width (B)
3.000
mm
+ 0.000 / - 0.120
(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x8x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Flange Diameter (DF): 9.200    Flange Width (BF): 0.600    Precision Grade: P6   
Category: Bearings - Single Row Ball - Flanged
Part Number: FMR84A-ZZ-MC3-JP6 (PK-50)
Contact Us | Special Order Only - Please contact us if you need a large quantity | Backorder now for delivery around Wed, Apr 04, 2029
Single Row Ball Bearings - 4x8x5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
O.D. (D)
8.000
mm
Width (B)
5.000
mm
Single Row Ball Bearings - 4x8x5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Deleted Item. Available while stocks last. Non ISO Width
Part Number: MR84D-ZZS-ECO (Each)
16 Available Now | Item Discontinued - Up to 16 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $8.00 AUD
Regular price $15.20 AUD Sale price $8.00 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

16 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x8x5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
O.D. (D)
8.000
mm
Width (B)
5.000
mm
Single Row Ball Bearings - 4x8x5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Deleted Item. Available while stocks last. Non ISO Width
Part Number: MR84D-ZZS-ECO (Each)
16 Available Now | Item Discontinued - Up to 16 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $8.00 AUD
Regular price $15.20 AUD Sale price $8.00 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

16 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.125
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684-MC2-AF12 (PK-100)
Out of Stock | Backorder Now | Backorder now for delivery around Thu, Aug 13, 2026
Regular price $352.14 AUD
Regular price $422.56 AUD Sale price $352.14 AUD
Priced, Stocked and Sold Per 100 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.125
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684-MC2-AF12 (PK-100)
Out of Stock | Backorder Now | Backorder now for delivery around Thu, Aug 13, 2026
Regular price $352.14 AUD
Regular price $422.56 AUD Sale price $352.14 AUD
Priced, Stocked and Sold Per 100 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Stainless Steel AISI 440C - Ribbon Retainer Low Torque Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.005
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.040
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C - Ribbon Retainer Low Torque
Material: Stainless Steel AISI 440C - Ribbon Retainer Low Torque    Precision Grade: Abec 5   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684-MC34-GR5-L23 (PK-40)
Out of Stock | Backorder Now | Backorder now for delivery around Sat, Sep 05, 2026
Regular price $1,056.86 AUD
Regular price Sale price $1,056.86 AUD
Priced, Stocked and Sold Per 40 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Stainless Steel AISI 440C - Ribbon Retainer Low Torque Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.005
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.040
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C - Ribbon Retainer Low Torque
Material: Stainless Steel AISI 440C - Ribbon Retainer Low Torque    Precision Grade: Abec 5   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684-MC34-GR5-L23 (PK-40)
Out of Stock | Backorder Now | Backorder now for delivery around Sat, Sep 05, 2026
Regular price $1,056.86 AUD
Regular price Sale price $1,056.86 AUD
Priced, Stocked and Sold Per 40 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.125
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684-MC3-AF12 (Each)
Out of Stock | Backorder Now | Backorder now for delivery around Thu, Aug 13, 2026
Regular price $5.77 AUD
Regular price Sale price $5.77 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.125
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684-MC3-AF12 (Each)
Out of Stock | Backorder Now | Backorder now for delivery around Thu, Aug 13, 2026
Regular price $5.77 AUD
Regular price Sale price $5.77 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Stainless Steel AISI 440C - Ribbon Retainer Low Torque Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.004
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.040
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C - Ribbon Retainer Low Torque
Material: Stainless Steel AISI 440C - Ribbon Retainer Low Torque    Precision Grade: Abec 7   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684-MC34-GR7-R-L23 (PK-68)
Out of Stock | Backorder Now | Backorder now for delivery around Sat, Sep 05, 2026
Regular price $2,550.95 AUD
Regular price $3,061.15 AUD Sale price $2,550.95 AUD
Priced, Stocked and Sold Per 68 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Stainless Steel AISI 440C - Ribbon Retainer Low Torque Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.004
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.040
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C - Ribbon Retainer Low Torque
Material: Stainless Steel AISI 440C - Ribbon Retainer Low Torque    Precision Grade: Abec 7   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684-MC34-GR7-R-L23 (PK-68)
Out of Stock | Backorder Now | Backorder now for delivery around Sat, Sep 05, 2026
Regular price $2,550.95 AUD
Regular price $3,061.15 AUD Sale price $2,550.95 AUD
Priced, Stocked and Sold Per 68 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.125
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684-MC3-R-AF12 (Each)
75 Available Now | Further orders can be expected around Fri, Aug 07, 2026
Regular price $8.95 AUD
Regular price Sale price $8.95 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 75 available can be backordered.
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.125
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684-MC3-R-AF12 (Each)
75 Available Now | Further orders can be expected around Fri, Aug 07, 2026
Regular price $8.95 AUD
Regular price Sale price $8.95 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

75 Available Now. Backorder if more than 75.
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.005
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.040
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 5   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684-MC4-GR5-R-AF12 (PK-1000)
Out of Stock | Backorder Now | Backorder now for delivery around Fri, Nov 13, 2026
Regular price $8,620.50 AUD
Regular price Sale price $8,620.50 AUD
Priced, Stocked and Sold Per 1000 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.005
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.040
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 5   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684-MC4-GR5-R-AF12 (PK-1000)
Out of Stock | Backorder Now | Backorder now for delivery around Fri, Nov 13, 2026
Regular price $8,620.50 AUD
Regular price Sale price $8,620.50 AUD
Priced, Stocked and Sold Per 1000 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
O.D. (D)
9.000
mm
Width (B)
2.500
mm
Single Row Ball Bearings - 4x9x2.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Part Number: 684-ZZS-ECO (Each)
19 Available Now | Further orders can be expected around Fri, Aug 07, 2026
Regular price $1.86 AUD
Regular price Sale price $1.86 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 19 available can be backordered.
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
O.D. (D)
9.000
mm
Width (B)
2.500
mm
Single Row Ball Bearings - 4x9x2.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Part Number: 684-ZZS-ECO (Each)
19 Available Now | Further orders can be expected around Fri, Aug 07, 2026
Regular price $1.86 AUD
Regular price Sale price $1.86 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

19 Available Now. Backorder if more than 19.
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.125
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Part Number: 684-MC3-AF12 (Each)
22 Available Now | More stock due: 200 around Thu, Jul 16, 2026 | Further orders can be expected around Thu, Aug 13, 2026
Regular price $3.68 AUD
Regular price Sale price $3.68 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 22 available can be backordered.
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.125
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Part Number: 684-MC3-AF12 (Each)
22 Available Now | More stock due: 200 around Thu, Jul 16, 2026 | Further orders can be expected around Thu, Aug 13, 2026
Regular price $3.68 AUD
Regular price Sale price $3.68 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

22 Available Now. Backorder if more than 22.
Single Row Ball Bearings - 4x9x2.5 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.125
(Equiv. 0.098 in.)
Flange Diameter (DF)
10.300
Flange Width (BF)
0.600
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Flanged
Open flanged stainless steel bearing
Part Number: SF684-MC3-AF12 (Each)
200 Available Now | Item Discontinued - Up to 200 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $2.59 AUD
Regular price $7.11 AUD Sale price $2.59 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

200 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x9x2.5 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.125
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Flange Diameter (DF): 10.300    Flange Width (BF): 0.600    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Flanged
Open flanged stainless steel bearing
Part Number: SF684-MC3-AF12 (Each)
200 Available Now | Item Discontinued - Up to 200 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $2.59 AUD
Regular price $7.11 AUD Sale price $2.59 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

200 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x9x2.5 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.005
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.040
(Equiv. 0.098 in.)
Flange Diameter (DF)
10.300
Flange Width (BF)
0.600
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 5   
Category: Bearings - Single Row Ball - Flanged
Part Number: SF684-MC34-GR5-R-L23 (PK-40)
Out of Stock | Backorder Now | Backorder now for delivery around Sat, Sep 05, 2026
Regular price $1,658.59 AUD
Regular price Sale price $1,658.59 AUD
Priced, Stocked and Sold Per 40 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x2.5 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.005
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.040
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Flange Diameter (DF): 10.300    Flange Width (BF): 0.600    Precision Grade: Abec 5   
Category: Bearings - Single Row Ball - Flanged
Part Number: SF684-MC34-GR5-R-L23 (PK-40)
Out of Stock | Backorder Now | Backorder now for delivery around Sat, Sep 05, 2026
Regular price $1,658.59 AUD
Regular price Sale price $1,658.59 AUD
Priced, Stocked and Sold Per 40 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x2.5 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.004
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.040
(Equiv. 0.098 in.)
Flange Diameter (DF)
10.300
Flange Width (BF)
0.600
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 7   
Category: Bearings - Single Row Ball - Flanged
Part Number: SF684-MC34-GR7-R-L23 (PK-57)
Out of Stock | Backorder Now | Backorder now for delivery around Sat, Sep 05, 2026
Regular price $2,582.05 AUD
Regular price $3,098.45 AUD Sale price $2,582.05 AUD
Priced, Stocked and Sold Per 57 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x2.5 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.004
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.040
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Flange Diameter (DF): 10.300    Flange Width (BF): 0.600    Precision Grade: Abec 7   
Category: Bearings - Single Row Ball - Flanged
Part Number: SF684-MC34-GR7-R-L23 (PK-57)
Out of Stock | Backorder Now | Backorder now for delivery around Sat, Sep 05, 2026
Regular price $2,582.05 AUD
Regular price $3,098.45 AUD Sale price $2,582.05 AUD
Priced, Stocked and Sold Per 57 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x2.5 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.007
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.120
(Equiv. 0.098 in.)
Flange Diameter (DF)
10.300
Flange Width (BF)
0.600
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: P6   
Category: Bearings - Single Row Ball - Flanged
Part Number: SF684-MC3-JP6-AF12 (PK-50)
Out of Stock | Backorder Now | Backorder now for delivery around Thu, Aug 13, 2026
Regular price $332.50 AUD
Regular price $702.36 AUD Sale price $332.50 AUD
Priced, Stocked and Sold Per 50 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x2.5 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.007
(Equiv. 0.354 in.)
Width (B)
2.500
mm
+ 0.000 / - 0.120
(Equiv. 0.098 in.)
Single Row Ball Bearings - 4x9x2.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Flange Diameter (DF): 10.300    Flange Width (BF): 0.600    Precision Grade: P6   
Category: Bearings - Single Row Ball - Flanged
Part Number: SF684-MC3-JP6-AF12 (PK-50)
Out of Stock | Backorder Now | Backorder now for delivery around Thu, Aug 13, 2026
Regular price $332.50 AUD
Regular price $702.36 AUD Sale price $332.50 AUD
Priced, Stocked and Sold Per 50 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
O.D. (D)
9.000
mm
Width (B)
3.000
mm
Single Row Ball Bearings - 4x9x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Part Number: 684D-ZZS-ECO (Each)
88 Available Now | Further orders can be expected around Fri, Aug 07, 2026
Regular price $3.59 AUD
Regular price Sale price $3.59 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 88 available can be backordered.
Single Row Ball Bearings - 4x9x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
O.D. (D)
9.000
mm
Width (B)
3.000
mm
Single Row Ball Bearings - 4x9x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Part Number: 684D-ZZS-ECO (Each)
88 Available Now | Further orders can be expected around Fri, Aug 07, 2026
Regular price $3.59 AUD
Regular price Sale price $3.59 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

88 Available Now. Backorder if more than 88.
Single Row Ball Bearings - 4x9x3.5 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
3.500
mm
+ 0.000 / - 0.125
(Equiv. 0.138 in.)
Single Row Ball Bearings - 4x9x3.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Non ISO Width
Part Number: S684B-ZZ-MC3 (Each)
97 Available Now | Further orders can be expected around Thu, Aug 13, 2026
Regular price $4.50 AUD
Regular price Sale price $4.50 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 97 available can be backordered.
Single Row Ball Bearings - 4x9x3.5 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
3.500
mm
+ 0.000 / - 0.125
(Equiv. 0.138 in.)
Single Row Ball Bearings - 4x9x3.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Non ISO Width
Part Number: S684B-ZZ-MC3 (Each)
97 Available Now | Further orders can be expected around Thu, Aug 13, 2026
Regular price $4.50 AUD
Regular price Sale price $4.50 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

97 Available Now. Backorder if more than 97.
Single Row Ball Bearings - 4x9x3.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
3.500
mm
+ 0.000 / - 0.125
(Equiv. 0.138 in.)
Single Row Ball Bearings - 4x9x3.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Non ISO Width
Part Number: 684B-ZZ-MC3 (Each)
258 Available Now | Further orders can be expected around Thu, Aug 13, 2026
Regular price $4.95 AUD
Regular price Sale price $4.95 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 258 available can be backordered.
Single Row Ball Bearings - 4x9x3.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
3.500
mm
+ 0.000 / - 0.125
(Equiv. 0.138 in.)
Single Row Ball Bearings - 4x9x3.5 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Non ISO Width
Part Number: 684B-ZZ-MC3 (Each)
258 Available Now | Further orders can be expected around Thu, Aug 13, 2026
Regular price $4.95 AUD
Regular price Sale price $4.95 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

258 Available Now. Backorder if more than 258.
Single Row Ball Bearings - 4x9x3.5 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
3.500
mm
+ 0.000 / - 0.125
(Equiv. 0.138 in.)
Flange Diameter (DF)
10.300
Flange Width (BF)
0.600
Single Row Ball Bearings - 4x9x3.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Flanged
Part Number: SF684B-ZZ-MC3 (Each)
73 Available Now | Item Discontinued - Up to 73 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $2.68 AUD
Regular price $7.33 AUD Sale price $2.68 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

73 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x9x3.5 mm Flanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
3.500
mm
+ 0.000 / - 0.125
(Equiv. 0.138 in.)
Single Row Ball Bearings - 4x9x3.5 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Flange Diameter (DF): 10.300    Flange Width (BF): 0.600    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Flanged
Part Number: SF684B-ZZ-MC3 (Each)
73 Available Now | Item Discontinued - Up to 73 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $2.68 AUD
Regular price $7.33 AUD Sale price $2.68 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

73 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C - Phenolic Retainer Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.005
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.040
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C - Phenolic Retainer Bearing
Material: Stainless Steel AISI 440C - Phenolic Retainer    Precision Grade: P5P   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684A-ZZS-MC3-GR5-KC-L23 (PK-20)
Out of Stock | Backorder Now | Backorder now for delivery around Sat, Sep 05, 2026
Regular price $1,504.05 AUD
Regular price Sale price $1,504.05 AUD
Priced, Stocked and Sold Per 20 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C - Phenolic Retainer Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.005
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.040
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C - Phenolic Retainer Bearing
Material: Stainless Steel AISI 440C - Phenolic Retainer    Precision Grade: P5P   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684A-ZZS-MC3-GR5-KC-L23 (PK-20)
Out of Stock | Backorder Now | Backorder now for delivery around Sat, Sep 05, 2026
Regular price $1,504.05 AUD
Regular price Sale price $1,504.05 AUD
Priced, Stocked and Sold Per 20 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Double shielded standard stainless steel bearing
Part Number: S684A-ZZ-MC3 (Each)
150 Available Now | Further orders can be expected around Thu, Aug 13, 2026
Regular price $3.77 AUD
Regular price Sale price $3.77 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 150 available can be backordered.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged
Double shielded standard stainless steel bearing
Part Number: S684A-ZZ-MC3 (Each)
150 Available Now | Further orders can be expected around Thu, Aug 13, 2026
Regular price $3.77 AUD
Regular price Sale price $3.77 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

150 Available Now. Backorder if more than 150.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C - Ribbon Retainer Low Torque Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.004
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.040
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C - Ribbon Retainer Low Torque
Material: Stainless Steel AISI 440C - Ribbon Retainer Low Torque    Precision Grade: Abec 7   
Category: Bearings - Single Row Ball - Unflanged
Double shielded Abec 7 precision stainless steel bearing with low-torque ribbon retainer. Band around OD is a manufacturers precision marker.
Part Number: S684A-ZZS-MC34-GR7-R-G48 (Each)
2 Available Now | Further orders can be expected around Thu, Aug 20, 2026
Regular price $47.05 AUD
Regular price Sale price $47.05 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 2 available can be backordered.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C - Ribbon Retainer Low Torque Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.004
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.040
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C - Ribbon Retainer Low Torque
Material: Stainless Steel AISI 440C - Ribbon Retainer Low Torque    Precision Grade: Abec 7   
Category: Bearings - Single Row Ball - Unflanged
Double shielded Abec 7 precision stainless steel bearing with low-torque ribbon retainer. Band around OD is a manufacturers precision marker.
Part Number: S684A-ZZS-MC34-GR7-R-G48 (Each)
2 Available Now | Further orders can be expected around Thu, Aug 20, 2026
Regular price $47.05 AUD
Regular price Sale price $47.05 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

2 Available Now. Backorder if more than 2.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
O.D. (D)
9.000
mm
Width (B)
4.000
mm
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684A-ZZS-ECO (Each)
90 Available Now | Further orders can be expected around Fri, Aug 07, 2026
Regular price $3.77 AUD
Regular price Sale price $3.77 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 90 available can be backordered.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
O.D. (D)
9.000
mm
Width (B)
4.000
mm
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684A-ZZS-ECO (Each)
90 Available Now | Further orders can be expected around Fri, Aug 07, 2026
Regular price $3.77 AUD
Regular price Sale price $3.77 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

90 Available Now. Backorder if more than 90.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C - Ribbon Retainer Low Torque Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.005
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.040
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C - Ribbon Retainer Low Torque
Material: Stainless Steel AISI 440C - Ribbon Retainer Low Torque    Precision Grade: Abec 5   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684A-ZZS-MC34-GR5-R-G48 (PK-22)
Out of Stock | Backorder Now | Backorder now for delivery around Sat, Sep 05, 2026
Regular price $1,142.41 AUD
Regular price Sale price $1,142.41 AUD
Priced, Stocked and Sold Per 22 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C - Ribbon Retainer Low Torque Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.005
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.005
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.040
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C - Ribbon Retainer Low Torque
Material: Stainless Steel AISI 440C - Ribbon Retainer Low Torque    Precision Grade: Abec 5   
Category: Bearings - Single Row Ball - Unflanged
Part Number: S684A-ZZS-MC34-GR5-R-G48 (PK-22)
Out of Stock | Backorder Now | Backorder now for delivery around Sat, Sep 05, 2026
Regular price $1,142.41 AUD
Regular price Sale price $1,142.41 AUD
Priced, Stocked and Sold Per 22 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.007
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.120
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: P6   
Category: Bearings - Single Row Ball - Unflanged
Double shielded P6 precision stainless steel bearing
Part Number: S684A-ZZ-MC3-JP6 (Each)
4 Available Now | Further orders can be expected around Thu, Aug 13, 2026
Regular price $4.86 AUD
Regular price Sale price $4.86 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 4 available can be backordered.
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C Bearing
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
O.D. (D)
9.000
mm
+ 0.000 / - 0.007
(Equiv. 0.354 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.120
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: P6   
Category: Bearings - Single Row Ball - Unflanged
Double shielded P6 precision stainless steel bearing
Part Number: S684A-ZZ-MC3-JP6 (Each)
4 Available Now | Further orders can be expected around Thu, Aug 13, 2026
Regular price $4.86 AUD
Regular price Sale price $4.86 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

4 Available Now. Backorder if more than 4.