Inserts - Expansion - Press In - 303 Stainless - Flanged

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

There are 6 products in the sub-categories of Inserts - Expansion - Press In - 303 Stainless - Flanged. Browse the Inserts - Expansion - Press In - 303 Stainless - Flanged products table.

Category Details

A selection of Flanged 303 Stainless 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.

  • Used to create a reusable threaded hole in a material by expanding once it is in place.
  • Installed by being pressed into a pre-drilled hole, and a subsequent tightening of a screw or bolt causes it to expand and grip the material's interior, providing a strong, stable connection.
  • Common types are for wood, plastic, and masonry, with different designs tailored to the material's properties.
  • 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

Additional resources:


A more concise listing may be found in the Inserts - Expansion - Press In - 303 Stainless - Flanged category on the Small Parts & Bearings online store.
Internal Thread Rec. Hole Diameter Length (L) Recommended Hole Diameter (A) Knurled OD (B) Indicative
Image
Expansion Inserts - 2-56 UNC - 2.18mm - 3.175x3.96 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Internal Thread
2-56 UNC (2.18mm)
Rec. Hole Diameter
3.175
mm
Length (L)
3.96
mm
Knurled OD (B)
3.429
mm
Expansion Inserts - 2-56 UNC - 2.18mm - 3.175x3.96 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80    Flange OD (A): 4.750   
Part Number: IN-EP-022C-039-FS3 (PK-2)
10 units (20 pcs) Available Now | Further orders can be expected around Sun, Aug 02, 2026
$6.77 AUD
$8.13 AUD $6.77 AUD
Priced, Stocked and Sold Per 2 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 10 available can be backordered.
Internal Thread Rec. Hole Diameter Length (L) Recommended Hole Diameter (A) Indicative
Image
Expansion Inserts - 2-56 UNC - 2.18mm - 3.175x3.96 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Internal Thread
2-56 UNC (2.18mm)
Rec. Hole Diameter
3.175
mm
Length (L)
3.96
mm
Expansion Inserts - 2-56 UNC - 2.18mm - 3.175x3.96 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80    Knurled OD (B): 3.429 mm    Flange OD (A): 4.750   
Part Number: IN-EP-022C-039-FS3 (PK-2)
10 units (20 pcs) Available Now | Further orders can be expected around Sun, Aug 02, 2026
$6.77 AUD
$8.13 AUD $6.77 AUD
Priced, Stocked and Sold Per 2 Units
Excludes GST and overseas Taxes & Duties
Quantity Required

10 units (20 pcs) Available Now. Backorder if more than 10.
Expansion Inserts - 4-40 UNC - 2.85mm - 3.962x4.78 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Internal Thread
4-40 UNC (2.85mm)
Rec. Hole Diameter
3.962
mm
Length (L)
4.78
mm
Knurled OD (B)
4.216
mm
Expansion Inserts - 4-40 UNC - 2.85mm - 3.962x4.78 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80    Flange OD (A): 5.537   
Part Number: IN-EP-029C-048-FS3 (Each)
10 Available Now | Further orders can be expected around Sun, Aug 02, 2026
$6.86 AUD
$6.86 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 10 available can be backordered.
Expansion Inserts - 4-40 UNC - 2.85mm - 3.962x4.78 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Internal Thread
4-40 UNC (2.85mm)
Rec. Hole Diameter
3.962
mm
Length (L)
4.78
mm
Expansion Inserts - 4-40 UNC - 2.85mm - 3.962x4.78 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80    Knurled OD (B): 4.216 mm    Flange OD (A): 5.537   
Part Number: IN-EP-029C-048-FS3 (Each)
10 Available Now | Further orders can be expected around Sun, Aug 02, 2026
$6.86 AUD
$6.86 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

10 Available Now. Backorder if more than 10.
Expansion Inserts - 6-32 UNC - 3.5mm - 4.75x6.35 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Internal Thread
6-32 UNC (3.5mm)
Rec. Hole Diameter
4.750
mm
Length (L)
6.35
mm
Knurled OD (B)
5.055
mm
Expansion Inserts - 6-32 UNC - 3.5mm - 4.75x6.35 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80    Flange OD (A): 6.325   
Part Number: IN-EP-035C-064-FS3 (Each)
10 Available Now | Further orders can be expected around Sun, Aug 02, 2026
$6.59 AUD
$6.59 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 10 available can be backordered.
Expansion Inserts - 6-32 UNC - 3.5mm - 4.75x6.35 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Internal Thread
6-32 UNC (3.5mm)
Rec. Hole Diameter
4.750
mm
Length (L)
6.35
mm
Expansion Inserts - 6-32 UNC - 3.5mm - 4.75x6.35 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80    Knurled OD (B): 5.055 mm    Flange OD (A): 6.325   
Part Number: IN-EP-035C-064-FS3 (Each)
10 Available Now | Further orders can be expected around Sun, Aug 02, 2026
$6.59 AUD
$6.59 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

10 Available Now. Backorder if more than 10.
Expansion Inserts - 8-32 UNC - 4.17mm - 5.537x7.95 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Internal Thread
8-32 UNC (4.17mm)
Rec. Hole Diameter
5.537
mm
Length (L)
7.95
mm
Knurled OD (B)
5.842
mm
Expansion Inserts - 8-32 UNC - 4.17mm - 5.537x7.95 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80    Flange OD (A): 7.112   
Part Number: IN-EP-042C-079-FS3 (Each)
10 Available Now | Further orders can be expected around Sun, Aug 02, 2026
$10.23 AUD
$10.23 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 10 available can be backordered.
Expansion Inserts - 8-32 UNC - 4.17mm - 5.537x7.95 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Internal Thread
8-32 UNC (4.17mm)
Rec. Hole Diameter
5.537
mm
Length (L)
7.95
mm
Expansion Inserts - 8-32 UNC - 4.17mm - 5.537x7.95 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80    Knurled OD (B): 5.842 mm    Flange OD (A): 7.112   
Part Number: IN-EP-042C-079-FS3 (Each)
10 Available Now | Further orders can be expected around Sun, Aug 02, 2026
$10.23 AUD
$10.23 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

10 Available Now. Backorder if more than 10.
Expansion Inserts - 10-32 UNF - 4.76mm - 6.35x9.53 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Internal Thread
10-32 UNF (4.76mm)
Rec. Hole Diameter
6.350
mm
Length (L)
9.53
mm
Knurled OD (B)
6.655
mm
Expansion Inserts - 10-32 UNF - 4.76mm - 6.35x9.53 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80    Flange OD (A): 7.925   
Part Number: IN-EP-048F-095-FS3 (Each)
10 Available Now | Further orders can be expected around Sun, Aug 02, 2026
$6.05 AUD
$7.25 AUD $6.05 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 10 available can be backordered.
Expansion Inserts - 10-32 UNF - 4.76mm - 6.35x9.53 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Internal Thread
10-32 UNF (4.76mm)
Rec. Hole Diameter
6.350
mm
Length (L)
9.53
mm
Expansion Inserts - 10-32 UNF - 4.76mm - 6.35x9.53 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80    Knurled OD (B): 6.655 mm    Flange OD (A): 7.925   
Part Number: IN-EP-048F-095-FS3 (Each)
10 Available Now | Further orders can be expected around Sun, Aug 02, 2026
$6.05 AUD
$7.25 AUD $6.05 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

10 Available Now. Backorder if more than 10.
Expansion Inserts - 1/4-20 UNC - 6.35mm - 7.938x12.7 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Internal Thread
1/4-20 UNC (6.35mm)
Rec. Hole Diameter
7.938
mm
Length (L)
12.70
mm
Knurled OD (B)
8.280
mm
Expansion Inserts - 1/4-20 UNC - 6.35mm - 7.938x12.7 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80    Flange OD (A): 9.525   
Part Number: IN-EP-064C-127-FS3 (Each)
Out of Stock | Backorder Now | Backorder now for delivery around Tue, Aug 18, 2026
$9.14 AUD
$10.96 AUD $9.14 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.
Expansion Inserts - 1/4-20 UNC - 6.35mm - 7.938x12.7 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Internal Thread
1/4-20 UNC (6.35mm)
Rec. Hole Diameter
7.938
mm
Length (L)
12.70
mm
Expansion Inserts - 1/4-20 UNC - 6.35mm - 7.938x12.7 mm Press In - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80    Knurled OD (B): 8.280 mm    Flange OD (A): 9.525   
Part Number: IN-EP-064C-127-FS3 (Each)
Out of Stock | Backorder Now | Backorder now for delivery around Tue, Aug 18, 2026
$9.14 AUD
$10.96 AUD $9.14 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Backorder: Out of Stock.