Collection: Bearings - Single Row Ball - Unflanged

Bearings -> Single Row Ball -> Unflanged
ID (d) OD (D) Width (B) Inner Ring Width (Bn) Flange Diameter (DF) Flange Width (BF) Indicative
Image
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (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 - Precision
Part Number: S684-MC3-R-AF12
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Stainless Steel AISI 440C Bearing
369 Available Now | Further orders can be expected around Tue, Nov 25, 2025
Regular price $8.95 AUD
Regular price Sale price $8.95 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

369 Available Now. Backorder if more than 369.
ID (d) OD (D) Width (B) Inner Ring Width (Bn) Indicative
Image
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (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 - Precision
Part Number: S684-MC3-R-AF12
Single Row Ball Bearings - 4x9x2.5 mm Unflanged - Stainless Steel AISI 440C Bearing
369 Available Now | Further orders can be expected around Tue, Nov 25, 2025
Regular price $8.95 AUD
Regular price Sale price $8.95 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

369 Available Now. Backorder if more than 369.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
3.000
mm

(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x9x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged - Precision
Part Number: 684D-ZZS-ECO
Single Row Ball Bearings - 4x9x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
100 Available Now | Further orders can be expected around Tue, Nov 25, 2025
Regular price $3.86 AUD
Regular price Sale price $3.86 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

100 Available Now. Backorder if more than 100.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
3.000
mm

(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x9x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged - Precision
Part Number: 684D-ZZS-ECO
Single Row Ball Bearings - 4x9x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
100 Available Now | Further orders can be expected around Tue, Nov 25, 2025
Regular price $3.86 AUD
Regular price Sale price $3.86 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

100 Available Now. Backorder if more than 100.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (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 - Precision
Non ISO Width
Part Number: 684B-ZZ-MC3
Single Row Ball Bearings - 4x9x3.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
262 Available Now | Further orders can be expected around Mon, Dec 01, 2025
Regular price $5.68 AUD
Regular price Sale price $5.68 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

262 Available Now. Backorder if more than 262.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (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 - Precision
Non ISO Width
Part Number: 684B-ZZ-MC3
Single Row Ball Bearings - 4x9x3.5 mm Unflanged - Chrome Steel SAE 52100 Bearing
262 Available Now | Further orders can be expected around Mon, Dec 01, 2025
Regular price $5.68 AUD
Regular price Sale price $5.68 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

262 Available Now. Backorder if more than 262.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (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 - Precision
Non ISO Width
Part Number: S684B-ZZ-MC3
Single Row Ball Bearings - 4x9x3.5 mm Unflanged - Stainless Steel AISI 440C Bearing
97 Available Now | Further orders can be expected around Mon, Dec 01, 2025
Regular price $5.14 AUD
Regular price Sale price $5.14 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

97 Available Now. Backorder if more than 97.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (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 - Precision
Non ISO Width
Part Number: S684B-ZZ-MC3
Single Row Ball Bearings - 4x9x3.5 mm Unflanged - Stainless Steel AISI 440C Bearing
97 Available Now | Further orders can be expected around Mon, Dec 01, 2025
Regular price $5.14 AUD
Regular price Sale price $5.14 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

97 Available Now. Backorder if more than 97.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged - Precision
Part Number: 684A-2RS-ECO
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
Out of Stock | Backorder Now | Orders can be expected around Thu, Dec 04, 2025
Regular price $4.14 AUD
Regular price Sale price $4.14 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged - Precision
Part Number: 684A-2RS-ECO
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
Out of Stock | Backorder Now | Orders can be expected around Thu, Dec 04, 2025
Regular price $4.14 AUD
Regular price Sale price $4.14 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged - Precision
Deleted Item. Available while stocks last.
Part Number: 684A-ZZS-ECO (5 Pcs)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
4 units (20 pcs) Available Now | Item Discontinued - Up to 4 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $3.49 AUD
Regular price $6.02 AUD Sale price $3.49 AUD
5 Per Sell Unit
Excludes GST and overseas Taxes & Duties
Quantity Required

4 units (20 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged - Precision
Deleted Item. Available while stocks last.
Part Number: 684A-ZZS-ECO (5 Pcs)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
4 units (20 pcs) Available Now | Item Discontinued - Up to 4 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $3.49 AUD
Regular price $6.02 AUD Sale price $3.49 AUD
5 Per Sell Unit
Excludes GST and overseas Taxes & Duties
Quantity Required

4 units (20 pcs) Available Now. These are priced to quit. Please contact us for a quote if you require more.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (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 - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged - Precision
Part Number: 684A-2RS-MC3
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
73 Available Now | Further orders can be expected around Mon, Dec 01, 2025
Regular price $6.23 AUD
Regular price Sale price $6.23 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

73 Available Now. Backorder if more than 73.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (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 - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged - Precision
Part Number: 684A-2RS-MC3
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
73 Available Now | Further orders can be expected around Mon, Dec 01, 2025
Regular price $6.23 AUD
Regular price Sale price $6.23 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

73 Available Now. Backorder if more than 73.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (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 - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged - Precision
Part Number: 684A-ZZ-MC3 (2 Pcs)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
264 units (528 pcs) Available Now | Further orders can be expected around Mon, Dec 01, 2025
Regular price $6.68 AUD
Regular price Sale price $6.68 AUD
2 Per Sell Unit
Excludes GST and overseas Taxes & Duties
Quantity Required

264 units (528 pcs) Available Now. Backorder if more than 264.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (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 - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged - Precision
Part Number: 684A-ZZ-MC3 (2 Pcs)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
264 units (528 pcs) Available Now | Further orders can be expected around Mon, Dec 01, 2025
Regular price $6.68 AUD
Regular price Sale price $6.68 AUD
2 Per Sell Unit
Excludes GST and overseas Taxes & Duties
Quantity Required

264 units (528 pcs) Available Now. Backorder if more than 264.
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
OD (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 - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: P6   
Category: Bearings - Single Row Ball - Unflanged - Precision
Part Number: 684A-ZZ-MC3-JP6 (100 Pcs)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
Out of Stock | Backorder Now | Orders can be expected around Mon, Dec 01, 2025
Regular price $453.23 AUD
Regular price $543.87 AUD Sale price $453.23 AUD
100 Per Sell Unit
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
OD (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 - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: P6   
Category: Bearings - Single Row Ball - Unflanged - Precision
Part Number: 684A-ZZ-MC3-JP6 (100 Pcs)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
Out of Stock | Backorder Now | Orders can be expected around Mon, Dec 01, 2025
Regular price $453.23 AUD
Regular price $543.87 AUD Sale price $453.23 AUD
100 Per Sell Unit
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged - Precision
Part Number: 684A-2RB-ECO
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
750 Available Now | Further orders can be expected around Tue, Nov 25, 2025
Regular price $2.05 AUD
Regular price Sale price $2.05 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

750 Available Now. Backorder if more than 750.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged - Precision
Part Number: 684A-2RB-ECO
Single Row Ball Bearings - 4x9x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
750 Available Now | Further orders can be expected around Tue, Nov 25, 2025
Regular price $2.05 AUD
Regular price Sale price $2.05 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

750 Available Now. Backorder if more than 750.
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
OD (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 - Precision
Part Number: S684A-ZZ-MC3-JP6
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C Bearing
26 Available Now | Further orders can be expected around Mon, Dec 01, 2025
Regular price $4.05 AUD
Regular price Sale price $4.05 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

26 Available Now. Backorder if more than 26.
ID (d)
4.000
mm
+ 0.000 / - 0.007
(Equiv. 0.157 in.)
OD (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 - Precision
Part Number: S684A-ZZ-MC3-JP6
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C Bearing
26 Available Now | Further orders can be expected around Mon, Dec 01, 2025
Regular price $4.05 AUD
Regular price Sale price $4.05 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

26 Available Now. Backorder if more than 26.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (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 - Precision
Part Number: S684A-TTS-MC3 (100 Pcs)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C Bearing
Out of Stock | Backorder Now | Orders can be expected around Mon, Dec 01, 2025
Regular price $809.14 AUD
Regular price $970.96 AUD Sale price $809.14 AUD
100 Per Sell Unit
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (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 - Precision
Part Number: S684A-TTS-MC3 (100 Pcs)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C Bearing
Out of Stock | Backorder Now | Orders can be expected around Mon, Dec 01, 2025
Regular price $809.14 AUD
Regular price $970.96 AUD Sale price $809.14 AUD
100 Per Sell Unit
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (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 - Precision
Part Number: S684A-ZZ-MC3
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C Bearing
200 Available Now | Further orders can be expected around Mon, Dec 01, 2025
Regular price $4.32 AUD
Regular price Sale price $4.32 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

200 Available Now. Backorder if more than 200.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (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 - Precision
Part Number: S684A-ZZ-MC3
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C Bearing
200 Available Now | Further orders can be expected around Mon, Dec 01, 2025
Regular price $4.32 AUD
Regular price Sale price $4.32 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

200 Available Now. Backorder if more than 200.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (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 - Precision
Part Number: S684A-ZZ-MC3-DRY (100 Pcs)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C Bearing
Out of Stock | Backorder Now | Orders can be expected around Mon, Dec 01, 2025
Regular price $453.23 AUD
Regular price $543.87 AUD Sale price $453.23 AUD
100 Per Sell Unit
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (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 - Precision
Part Number: S684A-ZZ-MC3-DRY (100 Pcs)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C Bearing
Out of Stock | Backorder Now | Orders can be expected around Mon, Dec 01, 2025
Regular price $453.23 AUD
Regular price $543.87 AUD Sale price $453.23 AUD
100 Per Sell Unit
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged - Precision
Part Number: S684A-ZZS-ECO
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C Bearing
95 Available Now | Further orders can be expected around Tue, Nov 25, 2025
Regular price $4.14 AUD
Regular price Sale price $4.14 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

95 Available Now. Backorder if more than 95.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
9.000
mm

(Equiv. 0.354 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x9x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged - Precision
Part Number: S684A-ZZS-ECO
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C Bearing
95 Available Now | Further orders can be expected around Tue, Nov 25, 2025
Regular price $4.14 AUD
Regular price Sale price $4.14 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

95 Available Now. Backorder if more than 95.
ID (d)
4.000
mm
+ 0.000 / - 0.005
(Equiv. 0.157 in.)
OD (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 - High Precision
Part Number: S684A-ZZS-MC34-GR5-R-G48 (22 Pcs)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C - Ribbon Retainer Low Torque Bearing
Out of Stock | Backorder Now | Orders can be expected around Wed, Dec 24, 2025
Regular price $1,142.41 AUD
Regular price Sale price $1,142.41 AUD
22 Per Sell Unit
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.005
(Equiv. 0.157 in.)
OD (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 - High Precision
Part Number: S684A-ZZS-MC34-GR5-R-G48 (22 Pcs)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C - Ribbon Retainer Low Torque Bearing
Out of Stock | Backorder Now | Orders can be expected around Wed, Dec 24, 2025
Regular price $1,142.41 AUD
Regular price Sale price $1,142.41 AUD
22 Per Sell Unit
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.004
(Equiv. 0.157 in.)
OD (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 - High Precision
Part Number: S684A-ZZS-MC34-GR7-R-G48 (40 Pcs)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C - Ribbon Retainer Low Torque Bearing
Out of Stock | Backorder Now | Orders can be expected around Wed, Dec 24, 2025
Regular price $2,354.50 AUD
Regular price Sale price $2,354.50 AUD
40 Per Sell Unit
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.004
(Equiv. 0.157 in.)
OD (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 - High Precision
Part Number: S684A-ZZS-MC34-GR7-R-G48 (40 Pcs)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C - Ribbon Retainer Low Torque Bearing
Out of Stock | Backorder Now | Orders can be expected around Wed, Dec 24, 2025
Regular price $2,354.50 AUD
Regular price Sale price $2,354.50 AUD
40 Per Sell Unit
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (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 - Precision
Part Number: S684A-ZZ-MC34-NMB (100 Pcs)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C Bearing
Out of Stock | Backorder Now | Orders can be expected around Mon, Dec 01, 2025
Regular price $467.86 AUD
Regular price $561.44 AUD Sale price $467.86 AUD
100 Per Sell Unit
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (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 - Precision
Part Number: S684A-ZZ-MC34-NMB (100 Pcs)
Single Row Ball Bearings - 4x9x4 mm Unflanged - Stainless Steel AISI 440C Bearing
Out of Stock | Backorder Now | Orders can be expected around Mon, Dec 01, 2025
Regular price $467.86 AUD
Regular price $561.44 AUD Sale price $467.86 AUD
100 Per Sell Unit
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
10.000
mm

(Equiv. 0.394 in.)
Width (B)
3.000
mm

(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x10x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged - Precision
Deleted Item. Available while stocks last. Non ISO Width
Part Number: MR104-2RB-ECO
Single Row Ball Bearings - 4x10x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
185 Available Now | Item Discontinued - Up to 185 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $4.00 AUD
Regular price $7.60 AUD Sale price $4.00 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

185 Available Now. These are priced to quit. Please contact us for a quote if you require more.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
10.000
mm

(Equiv. 0.394 in.)
Width (B)
3.000
mm

(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x10x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged - Precision
Deleted Item. Available while stocks last. Non ISO Width
Part Number: MR104-2RB-ECO
Single Row Ball Bearings - 4x10x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
185 Available Now | Item Discontinued - Up to 185 may be ordered online. No backorders. Please contact us if you need a larger quantity
Regular price $4.00 AUD
Regular price $7.60 AUD Sale price $4.00 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

185 Available Now. These are priced to quit. Please contact us for a quote if you require more.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
10.000
mm

(Equiv. 0.394 in.)
Width (B)
3.000
mm

(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x10x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged - Precision
Non ISO Width
Part Number: MR104-ZZS-ECO
Single Row Ball Bearings - 4x10x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
576 Available Now | Further orders can be expected around Tue, Nov 25, 2025
Regular price $2.59 AUD
Regular price Sale price $2.59 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

576 Available Now. Backorder if more than 576.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
10.000
mm

(Equiv. 0.394 in.)
Width (B)
3.000
mm

(Equiv. 0.118 in.)
Single Row Ball Bearings - 4x10x3 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged - Precision
Non ISO Width
Part Number: MR104-ZZS-ECO
Single Row Ball Bearings - 4x10x3 mm Unflanged - Chrome Steel SAE 52100 Bearing
576 Available Now | Further orders can be expected around Tue, Nov 25, 2025
Regular price $2.59 AUD
Regular price Sale price $2.59 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

576 Available Now. Backorder if more than 576.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
10.000
mm

(Equiv. 0.394 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged - Precision
Part Number: MR104A-2RS-ECO (2 Pcs)
Single Row Ball Bearings - 4x10x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
18 units (36 pcs) Available Now | Further orders can be expected around Tue, Nov 25, 2025
Regular price $1.23 AUD
Regular price $2.14 AUD Sale price $1.23 AUD
2 Per Sell Unit
Excludes GST and overseas Taxes & Duties
Quantity Required

18 units (36 pcs) Available Now. Backorder if more than 18.
ID (d)
4.000
mm

(Equiv. 0.157 in.)
OD (D)
10.000
mm

(Equiv. 0.394 in.)
Width (B)
4.000
mm

(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Chrome Steel SAE 52100
Material: Chrome Steel SAE 52100    Precision Grade: Economy   
Category: Bearings - Single Row Ball - Unflanged - Precision
Part Number: MR104A-2RS-ECO (2 Pcs)
Single Row Ball Bearings - 4x10x4 mm Unflanged - Chrome Steel SAE 52100 Bearing
18 units (36 pcs) Available Now | Further orders can be expected around Tue, Nov 25, 2025
Regular price $1.23 AUD
Regular price $2.14 AUD Sale price $1.23 AUD
2 Per Sell Unit
Excludes GST and overseas Taxes & Duties
Quantity Required

18 units (36 pcs) Available Now. Backorder if more than 18.
ID (d)
4.000
mm
+ 0.000 / - 0.005
(Equiv. 0.157 in.)
OD (D)
10.000
mm
+ 0.000 / - 0.005
(Equiv. 0.394 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.040
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Stainless Steel AISI 440C - Ribbon Retainer Low Torque
Material: Stainless Steel AISI 440C - Ribbon Retainer Low Torque    Precision Grade: P5P   
Category: Bearings - Single Row Ball - Unflanged - High Precision
Part Number: SMR104A-FF-TR-P5P-MC34-G48 (21 Pcs)
Single Row Ball Bearings - 4x10x4 mm Unflanged - Stainless Steel AISI 440C - Ribbon Retainer Low Torque Bearing
Out of Stock | Backorder Now | Orders can be expected around Wed, Dec 24, 2025
Regular price $1,125.86 AUD
Regular price Sale price $1,125.86 AUD
21 Per Sell Unit
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.005
(Equiv. 0.157 in.)
OD (D)
10.000
mm
+ 0.000 / - 0.005
(Equiv. 0.394 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.040
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Stainless Steel AISI 440C - Ribbon Retainer Low Torque
Material: Stainless Steel AISI 440C - Ribbon Retainer Low Torque    Precision Grade: P5P   
Category: Bearings - Single Row Ball - Unflanged - High Precision
Part Number: SMR104A-FF-TR-P5P-MC34-G48 (21 Pcs)
Single Row Ball Bearings - 4x10x4 mm Unflanged - Stainless Steel AISI 440C - Ribbon Retainer Low Torque Bearing
Out of Stock | Backorder Now | Orders can be expected around Wed, Dec 24, 2025
Regular price $1,125.86 AUD
Regular price Sale price $1,125.86 AUD
21 Per Sell Unit
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
10.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.394 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged - Precision
Part Number: SMR104A-2RS-MC3 (100 Pcs)
Single Row Ball Bearings - 4x10x4 mm Unflanged - Stainless Steel AISI 440C Bearing
Out of Stock | Backorder Now | Orders can be expected around Mon, Dec 01, 2025
Regular price $477.59 AUD
Regular price $573.11 AUD Sale price $477.59 AUD
100 Per Sell Unit
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
10.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.394 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged - Precision
Part Number: SMR104A-2RS-MC3 (100 Pcs)
Single Row Ball Bearings - 4x10x4 mm Unflanged - Stainless Steel AISI 440C Bearing
Out of Stock | Backorder Now | Orders can be expected around Mon, Dec 01, 2025
Regular price $477.59 AUD
Regular price $573.11 AUD Sale price $477.59 AUD
100 Per Sell Unit
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
10.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.394 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged - Precision
Part Number: SMR104A-ZZ-MC3
Single Row Ball Bearings - 4x10x4 mm Unflanged - Stainless Steel AISI 440C Bearing
156 Available Now | Further orders can be expected around Tue, Nov 25, 2025
Regular price $6.68 AUD
Regular price Sale price $6.68 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

156 Available Now. Backorder if more than 156.
ID (d)
4.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.157 in.)
OD (D)
10.000
mm
+ 0.000 / - 0.0075
(Equiv. 0.394 in.)
Width (B)
4.000
mm
+ 0.000 / - 0.125
(Equiv. 0.157 in.)
Single Row Ball Bearings - 4x10x4 mm - Stainless Steel AISI 440C
Material: Stainless Steel AISI 440C    Precision Grade: Abec 1   
Category: Bearings - Single Row Ball - Unflanged - Precision
Part Number: SMR104A-ZZ-MC3
Single Row Ball Bearings - 4x10x4 mm Unflanged - Stainless Steel AISI 440C Bearing
156 Available Now | Further orders can be expected around Tue, Nov 25, 2025
Regular price $6.68 AUD
Regular price Sale price $6.68 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

156 Available Now. Backorder if more than 156.