Collection: Inserts - Expansion - Press In - 303 Stainless Steel

Inserts -> Expansion -> Press In -> 303 Stainless Steel

There are 8 products in the sub-categories of Inserts - Expansion - Press In - 303 Stainless Steel. Browse the Inserts - Expansion - Press In - 303 Stainless Steel products table.

Category Details

A selection of 303 Stainless Steel Press In Expansion Inserts. Use for cored or drilled holes in plastics. Designed to replace molded in inserts and threads in plastic casings. Also known as threaded inserts.

Material : 303 Stainless Steel
Easiest inserts to install - simply push into a pre-moulded hole.
Used with plastics or other materials. Material must be strong enough to withstand the expansion of the insert.
The insertion of the screw locks the external knurls into the wall of the hole.
Provides excellent thread durability but where maximum strength is required other inserts shown in this catalogue should be preferred.

Miniature Bearings Australia - MBA Minibearings

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Assortment Kits

A more concise listing may be found in the Inserts - Expansion - Press In - 303 Stainless Steel category on the Small Parts & Bearings online store.

Internal Thread	Rec. Hole Diameter	Length (L)	Recommended Hole Diameter (A)	Knurled OD (B)
Internal Thread 2-56 UNC (2.18mm)	Rec. Hole Diameter 3.17 mm _{+ 0.000 / - 0.254} (Equiv. 0.125 in.)	Length (L) 3.96 mm _{+/ - 0.25} (Equiv. 0.156 in.)		Knurled OD (B) 3.18 mm
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80
Part Number: IN-EP-022C-039-S3 Expansion Inserts - 2-56 UNC - 2.18mm - 3.17x3.96 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert 20 Available Now \| Further orders can be expected around Mon, Sep 29, 2025 Regular price $4.50 AUD Regular price ~~$5.40 AUD~~ Sale price $4.50 AUD Unit price per Excludes GST and overseas Taxes & Duties Each Quantity Required 20 Available Now. Backorder if more than 20.
Internal Thread	Rec. Hole Diameter	Length (L)	Recommended Hole Diameter (A)	Indicative Image
Internal Thread 2-56 UNC (2.18mm)	Rec. Hole Diameter 3.17 mm _{+ 0.000 / - 0.254} (Equiv. 0.125 in.)	Length (L) 3.96 mm _{+/ - 0.25} (Equiv. 0.156 in.)
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80 Knurled OD (B): 3.18 mm
Part Number: IN-EP-022C-039-S3 Expansion Inserts - 2-56 UNC - 2.18mm - 3.17x3.96 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert 20 Available Now \| Further orders can be expected around Mon, Sep 29, 2025 Regular price $4.50 AUD Regular price ~~$5.40 AUD~~ Sale price $4.50 AUD Unit price per Excludes GST and overseas Taxes & Duties Each Quantity Required 20 Available Now. Backorder if more than 20.
IN-EP-022C-039-S3 --- Expansion Inserts - 2-56 UNC - 2.18mm - 3.17x3.96 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert Sale IN-EP-022C-039-S3 --- Expansion Inserts - 2-56 UNC - 2.18mm - 3.17x3.96 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert Regular price $4.50 AUD Regular price ~~$5.40 AUD~~ Sale price $4.50 AUD Unit price per Excludes GST and overseas Taxes & Duties 20 Available Now Sale
Internal Thread 4-40 UNC (2.85mm)	Rec. Hole Diameter 3.96 mm _{+ 0.000 / - 0.254} (Equiv. 0.156 in.)	Length (L) 4.78 mm _{+/ - 0.25} (Equiv. 0.188 in.)		Knurled OD (B) 3.97 mm
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80
Part Number: IN-EP-029C-048-S3 Expansion Inserts - 4-40 UNC - 2.85mm - 3.96x4.78 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert 20 Available Now \| Further orders can be expected around Mon, Sep 29, 2025 Regular price $4.23 AUD Regular price Sale price $4.23 AUD Unit price per Excludes GST and overseas Taxes & Duties Each Quantity Required 20 Available Now. Backorder if more than 20.
Internal Thread 4-40 UNC (2.85mm)	Rec. Hole Diameter 3.96 mm _{+ 0.000 / - 0.254} (Equiv. 0.156 in.)	Length (L) 4.78 mm _{+/ - 0.25} (Equiv. 0.188 in.)
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80 Knurled OD (B): 3.97 mm
Part Number: IN-EP-029C-048-S3 Expansion Inserts - 4-40 UNC - 2.85mm - 3.96x4.78 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert 20 Available Now \| Further orders can be expected around Mon, Sep 29, 2025 Regular price $4.23 AUD Regular price Sale price $4.23 AUD Unit price per Excludes GST and overseas Taxes & Duties Each Quantity Required 20 Available Now. Backorder if more than 20.
IN-EP-029C-048-S3 --- Expansion Inserts - 4-40 UNC - 2.85mm - 3.96x4.78 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert IN-EP-029C-048-S3 --- Expansion Inserts - 4-40 UNC - 2.85mm - 3.96x4.78 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert Regular price $4.23 AUD Regular price Sale price $4.23 AUD Unit price per Excludes GST and overseas Taxes & Duties 20 Available Now
Internal Thread 6-32 UNC (3.5mm)	Rec. Hole Diameter 4.75 mm _{+ 0.000 / - 0.254} (Equiv. 0.187 in.)	Length (L) 6.35 mm _{+/ - 0.25} (Equiv. 0.25 in.)		Knurled OD (B) 4.77 mm
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80
Part Number: IN-EP-035C-064-S3 Expansion Inserts - 6-32 UNC - 3.5mm - 4.75x6.35 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert 30 Available Now \| Further orders can be expected around Mon, Sep 29, 2025 Regular price $3.05 AUD Regular price Sale price $3.05 AUD Unit price per Excludes GST and overseas Taxes & Duties Each Quantity Required 30 Available Now. Backorder if more than 30.
Internal Thread 6-32 UNC (3.5mm)	Rec. Hole Diameter 4.75 mm _{+ 0.000 / - 0.254} (Equiv. 0.187 in.)	Length (L) 6.35 mm _{+/ - 0.25} (Equiv. 0.25 in.)
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80 Knurled OD (B): 4.77 mm
Part Number: IN-EP-035C-064-S3 Expansion Inserts - 6-32 UNC - 3.5mm - 4.75x6.35 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert 30 Available Now \| Further orders can be expected around Mon, Sep 29, 2025 Regular price $3.05 AUD Regular price Sale price $3.05 AUD Unit price per Excludes GST and overseas Taxes & Duties Each Quantity Required 30 Available Now. Backorder if more than 30.
IN-EP-035C-064-S3 --- Expansion Inserts - 6-32 UNC - 3.5mm - 4.75x6.35 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert IN-EP-035C-064-S3 --- Expansion Inserts - 6-32 UNC - 3.5mm - 4.75x6.35 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert Regular price $3.05 AUD Regular price Sale price $3.05 AUD Unit price per Excludes GST and overseas Taxes & Duties 30 Available Now
Internal Thread 8-32 UNC (4.17mm)	Rec. Hole Diameter 5.53 mm _{+ 0.000 / - 0.254} (Equiv. 0.218 in.)	Length (L) 7.95 mm _{+/ - 0.25} (Equiv. 0.313 in.)		Knurled OD (B) 5.54 mm
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80
Part Number: IN-EP-042C-079-S3 Expansion Inserts - 8-32 UNC - 4.17mm - 5.53x7.95 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert 10 Available Now \| Further orders can be expected around Mon, Sep 29, 2025 Regular price $8.41 AUD Regular price Sale price $8.41 AUD Unit price per Excludes GST and overseas Taxes & Duties Each Quantity Required 10 Available Now. Backorder if more than 10.
Internal Thread 8-32 UNC (4.17mm)	Rec. Hole Diameter 5.53 mm _{+ 0.000 / - 0.254} (Equiv. 0.218 in.)	Length (L) 7.95 mm _{+/ - 0.25} (Equiv. 0.313 in.)
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80 Knurled OD (B): 5.54 mm
Part Number: IN-EP-042C-079-S3 Expansion Inserts - 8-32 UNC - 4.17mm - 5.53x7.95 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert 10 Available Now \| Further orders can be expected around Mon, Sep 29, 2025 Regular price $8.41 AUD Regular price Sale price $8.41 AUD Unit price per Excludes GST and overseas Taxes & Duties Each Quantity Required 10 Available Now. Backorder if more than 10.
IN-EP-042C-079-S3 --- Expansion Inserts - 8-32 UNC - 4.17mm - 5.53x7.95 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert IN-EP-042C-079-S3 --- Expansion Inserts - 8-32 UNC - 4.17mm - 5.53x7.95 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert Regular price $8.41 AUD Regular price Sale price $8.41 AUD Unit price per Excludes GST and overseas Taxes & Duties 10 Available Now
Internal Thread 10-32 UNF (4.76mm)	Rec. Hole Diameter 6.34 mm _{+ 0.000 / - 0.254} (Equiv. 0.25 in.)	Length (L) 9.53 mm _{+/ - 0.25} (Equiv. 0.375 in.)		Knurled OD (B) 6.35 mm
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80
Part Number: IN-EP-048F-095-S3 Expansion Inserts - 10-32 UNF - 4.76mm - 6.34x9.53 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert 10 Available Now \| Further orders can be expected around Mon, Sep 29, 2025 Regular price $3.77 AUD Regular price ~~$4.53 AUD~~ Sale price $3.77 AUD Unit price per Excludes GST and overseas Taxes & Duties Each Quantity Required 10 Available Now. Backorder if more than 10.
Internal Thread 10-32 UNF (4.76mm)	Rec. Hole Diameter 6.34 mm _{+ 0.000 / - 0.254} (Equiv. 0.25 in.)	Length (L) 9.53 mm _{+/ - 0.25} (Equiv. 0.375 in.)
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80 Knurled OD (B): 6.35 mm
Part Number: IN-EP-048F-095-S3 Expansion Inserts - 10-32 UNF - 4.76mm - 6.34x9.53 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert 10 Available Now \| Further orders can be expected around Mon, Sep 29, 2025 Regular price $3.77 AUD Regular price ~~$4.53 AUD~~ Sale price $3.77 AUD Unit price per Excludes GST and overseas Taxes & Duties Each Quantity Required 10 Available Now. Backorder if more than 10.
IN-EP-048F-095-S3 --- Expansion Inserts - 10-32 UNF - 4.76mm - 6.34x9.53 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert Sale IN-EP-048F-095-S3 --- Expansion Inserts - 10-32 UNF - 4.76mm - 6.34x9.53 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert Regular price $3.77 AUD Regular price ~~$4.53 AUD~~ Sale price $3.77 AUD Unit price per Excludes GST and overseas Taxes & Duties 10 Available Now Sale
Internal Thread 1/4-20 UNC (6.35mm)	Rec. Hole Diameter 7.93 mm _{+ 0.000 / - 0.254} (Equiv. 0.312 in.)	Length (L) 12.70 mm _{+/ - 0.25} (Equiv. 0.5 in.)		Knurled OD (B) 7.94 mm
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80
Part Number: IN-EP-064C-127-S3 Expansion Inserts - 1/4-20 UNC - 6.35mm - 7.93x12.7 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert 6 Available Now \| Further orders can be expected around Mon, Sep 29, 2025 Regular price $5.68 AUD Regular price ~~$6.82 AUD~~ Sale price $5.68 AUD Unit price per Excludes GST and overseas Taxes & Duties Each Quantity Required 6 Available Now. Backorder if more than 6.
Internal Thread 1/4-20 UNC (6.35mm)	Rec. Hole Diameter 7.93 mm _{+ 0.000 / - 0.254} (Equiv. 0.312 in.)	Length (L) 12.70 mm _{+/ - 0.25} (Equiv. 0.5 in.)
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80 Knurled OD (B): 7.94 mm
Part Number: IN-EP-064C-127-S3 Expansion Inserts - 1/4-20 UNC - 6.35mm - 7.93x12.7 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert 6 Available Now \| Further orders can be expected around Mon, Sep 29, 2025 Regular price $5.68 AUD Regular price ~~$6.82 AUD~~ Sale price $5.68 AUD Unit price per Excludes GST and overseas Taxes & Duties Each Quantity Required 6 Available Now. Backorder if more than 6.
IN-EP-064C-127-S3 --- Expansion Inserts - 1/4-20 UNC - 6.35mm - 7.93x12.7 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert Sale IN-EP-064C-127-S3 --- Expansion Inserts - 1/4-20 UNC - 6.35mm - 7.93x12.7 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert Regular price $5.68 AUD Regular price ~~$6.82 AUD~~ Sale price $5.68 AUD Unit price per Excludes GST and overseas Taxes & Duties 6 Available Now Sale
Internal Thread 5/16-18 UNC (7.94mm)	Rec. Hole Diameter 9.52 mm _{+ 0.000 / - 0.254} (Equiv. 0.375 in.)	Length (L) 14.30 mm _{+/ - 0.25} (Equiv. 0.563 in.)		Knurled OD (B) 9.53 mm
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80
Part Number: IN-EP-079C-143-S3 Expansion Inserts - 5/16-18 UNC - 7.94mm - 9.52x14.3 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert 6 Available Now \| Further orders can be expected around Mon, Sep 29, 2025 Regular price $5.32 AUD Regular price ~~$6.38 AUD~~ Sale price $5.32 AUD Unit price per Excludes GST and overseas Taxes & Duties Each Quantity Required 6 Available Now. Backorder if more than 6.
Internal Thread 5/16-18 UNC (7.94mm)	Rec. Hole Diameter 9.52 mm _{+ 0.000 / - 0.254} (Equiv. 0.375 in.)	Length (L) 14.30 mm _{+/ - 0.25} (Equiv. 0.563 in.)
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80 Knurled OD (B): 9.53 mm
Part Number: IN-EP-079C-143-S3 Expansion Inserts - 5/16-18 UNC - 7.94mm - 9.52x14.3 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert 6 Available Now \| Further orders can be expected around Mon, Sep 29, 2025 Regular price $5.32 AUD Regular price ~~$6.38 AUD~~ Sale price $5.32 AUD Unit price per Excludes GST and overseas Taxes & Duties Each Quantity Required 6 Available Now. Backorder if more than 6.
IN-EP-079C-143-S3 --- Expansion Inserts - 5/16-18 UNC - 7.94mm - 9.52x14.3 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert Sale IN-EP-079C-143-S3 --- Expansion Inserts - 5/16-18 UNC - 7.94mm - 9.52x14.3 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert Regular price $5.32 AUD Regular price ~~$6.38 AUD~~ Sale price $5.32 AUD Unit price per Excludes GST and overseas Taxes & Duties 6 Available Now Sale
Internal Thread 3/8-16 UNC (9.53mm)	Rec. Hole Diameter 11.1 mm _{+ 0.000 / - 0.254} (Equiv. 0.437 in.)	Length (L) 15.88 mm _{+/ - 0.25} (Equiv. 0.625 in.)		Knurled OD (B) 11.11 mm
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80
Part Number: IN-EP-095C-159-S3 Expansion Inserts - 3/8-16 UNC - 9.53mm - 11.1x15.88 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert Out of Stock \| Backorder Now \| Orders can be expected around Mon, Sep 29, 2025 Regular price $9.32 AUD Regular price ~~$11.18 AUD~~ Sale price $9.32 AUD Unit price per Excludes GST and overseas Taxes & Duties Each Quantity Required Backorder: Out of Stock.
Internal Thread 3/8-16 UNC (9.53mm)	Rec. Hole Diameter 11.1 mm _{+ 0.000 / - 0.254} (Equiv. 0.437 in.)	Length (L) 15.88 mm _{+/ - 0.25} (Equiv. 0.625 in.)
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80 Knurled OD (B): 11.11 mm
Part Number: IN-EP-095C-159-S3 Expansion Inserts - 3/8-16 UNC - 9.53mm - 11.1x15.88 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert Out of Stock \| Backorder Now \| Orders can be expected around Mon, Sep 29, 2025 Regular price $9.32 AUD Regular price ~~$11.18 AUD~~ Sale price $9.32 AUD Unit price per Excludes GST and overseas Taxes & Duties Each Quantity Required Backorder: Out of Stock.
IN-EP-095C-159-S3 --- Expansion Inserts - 3/8-16 UNC - 9.53mm - 11.1x15.88 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert Sale IN-EP-095C-159-S3 --- Expansion Inserts - 3/8-16 UNC - 9.53mm - 11.1x15.88 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert Regular price $9.32 AUD Regular price ~~$11.18 AUD~~ Sale price $9.32 AUD Unit price per Excludes GST and overseas Taxes & Duties Out of stock! Backorder Now Sale

Collection: Inserts - Expansion - Press In - 303 Stainless Steel

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IN-EP-022C-039-S3 --- Expansion Inserts - 2-56 UNC - 2.18mm - 3.17x3.96 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert

IN-EP-022C-039-S3 --- Expansion Inserts - 2-56 UNC - 2.18mm - 3.17x3.96 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert

IN-EP-029C-048-S3 --- Expansion Inserts - 4-40 UNC - 2.85mm - 3.96x4.78 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert

IN-EP-029C-048-S3 --- Expansion Inserts - 4-40 UNC - 2.85mm - 3.96x4.78 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert

IN-EP-035C-064-S3 --- Expansion Inserts - 6-32 UNC - 3.5mm - 4.75x6.35 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert

IN-EP-035C-064-S3 --- Expansion Inserts - 6-32 UNC - 3.5mm - 4.75x6.35 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert

IN-EP-042C-079-S3 --- Expansion Inserts - 8-32 UNC - 4.17mm - 5.53x7.95 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert

IN-EP-042C-079-S3 --- Expansion Inserts - 8-32 UNC - 4.17mm - 5.53x7.95 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert

IN-EP-048F-095-S3 --- Expansion Inserts - 10-32 UNF - 4.76mm - 6.34x9.53 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert

IN-EP-048F-095-S3 --- Expansion Inserts - 10-32 UNF - 4.76mm - 6.34x9.53 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert

IN-EP-064C-127-S3 --- Expansion Inserts - 1/4-20 UNC - 6.35mm - 7.93x12.7 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert

IN-EP-064C-127-S3 --- Expansion Inserts - 1/4-20 UNC - 6.35mm - 7.93x12.7 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert

IN-EP-079C-143-S3 --- Expansion Inserts - 5/16-18 UNC - 7.94mm - 9.52x14.3 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert

IN-EP-079C-143-S3 --- Expansion Inserts - 5/16-18 UNC - 7.94mm - 9.52x14.3 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert

IN-EP-095C-159-S3 --- Expansion Inserts - 3/8-16 UNC - 9.53mm - 11.1x15.88 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert

IN-EP-095C-159-S3 --- Expansion Inserts - 3/8-16 UNC - 9.53mm - 11.1x15.88 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert

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Collection: Inserts - Expansion - Press In - 303 Stainless Steel

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