Inserts - Expansion - Press In - Brass - Flanged

8 Products in this selection

A selection of Flanged Brass 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 : Brass.
  • 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. Not as strong as wind-in inserts.
Small Parts & Bearings

Additional resources:
Assortment Kits

A more comprehensive listing may be found on the MBA Minibearings main store at Inserts - Expansion - Press In - Brass - Flanged.
Internal Thread Rec. Hole Diameter Length (L) Recommended Hole Diameter (A) Knurled OD (B) Indicative
Image
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 - Brass Insert
Material: Brass    Flange OD (A): 4.750   
Part Number: IN-EP-022C-039-FB (PK-5) Expansion Inserts - 2-56 UNC - 2.18mm - 3.175x3.96 mm Press In - Brass Insert
11 units (55 pcs) Available Now | Further orders can be expected around Wed, Jul 22, 2026
$2.50 AUD
$2.50 AUD
Per 5
Internal Thread Rec. Hole Diameter Length (L) Recommended Hole Diameter (A) Indicative
Image
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 - Brass Insert
Material: Brass    Knurled OD (B): 3.429 mm    Flange OD (A): 4.750   
Part Number: IN-EP-022C-039-FB (PK-5) Expansion Inserts - 2-56 UNC - 2.18mm - 3.175x3.96 mm Press In - Brass Insert
11 units (55 pcs) Available Now | Further orders can be expected around Wed, Jul 22, 2026
$2.50 AUD
$2.50 AUD
Per 5
View the product page first if you are unsure.
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 - Brass Insert
Material: Brass    Flange OD (A): 5.537   
Part Number: IN-EP-029C-048-FB (PK-5) Expansion Inserts - 4-40 UNC - 2.85mm - 3.962x4.78 mm Press In - Brass Insert
11 units (55 pcs) Available Now | Further orders can be expected around Wed, Jul 22, 2026
$5.68 AUD
$5.68 AUD
Per 5
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 - Brass Insert
Material: Brass    Knurled OD (B): 4.216 mm    Flange OD (A): 5.537   
Part Number: IN-EP-029C-048-FB (PK-5) Expansion Inserts - 4-40 UNC - 2.85mm - 3.962x4.78 mm Press In - Brass Insert
11 units (55 pcs) Available Now | Further orders can be expected around Wed, Jul 22, 2026
$5.68 AUD
$5.68 AUD
Per 5
View the product page first if you are unsure.
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 - Brass Insert
Material: Brass    Flange OD (A): 6.325   
Part Number: IN-EP-035C-064-FB (PK-2) Expansion Inserts - 6-32 UNC - 3.5mm - 4.75x6.35 mm Press In - Brass Insert
38 units (76 pcs) Available Now | Further orders can be expected around Wed, Jul 22, 2026
$6.23 AUD
$6.23 AUD
Per 2
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 - Brass Insert
Material: Brass    Knurled OD (B): 5.055 mm    Flange OD (A): 6.325   
Part Number: IN-EP-035C-064-FB (PK-2) Expansion Inserts - 6-32 UNC - 3.5mm - 4.75x6.35 mm Press In - Brass Insert
38 units (76 pcs) Available Now | Further orders can be expected around Wed, Jul 22, 2026
$6.23 AUD
$6.23 AUD
Per 2
View the product page first if you are unsure.
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 - Brass Insert
Material: Brass    Flange OD (A): 7.112   
Part Number: IN-EP-042C-079-FB (PK-10) Expansion Inserts - 8-32 UNC - 4.17mm - 5.537x7.95 mm Press In - Brass Insert
1 pack (10 pcs) Available Now | Further orders can be expected around Wed, Jul 22, 2026
$13.32 AUD
$13.32 AUD
Per 10
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 - Brass Insert
Material: Brass    Knurled OD (B): 5.842 mm    Flange OD (A): 7.112   
Part Number: IN-EP-042C-079-FB (PK-10) Expansion Inserts - 8-32 UNC - 4.17mm - 5.537x7.95 mm Press In - Brass Insert
1 pack (10 pcs) Available Now | Further orders can be expected around Wed, Jul 22, 2026
$13.32 AUD
$13.32 AUD
Per 10
View the product page first if you are unsure.
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 - Brass Insert
Material: Brass    Flange OD (A): 7.925   
Part Number: IN-EP-048F-095-FB (PK-10) Expansion Inserts - 10-32 UNF - 4.76mm - 6.35x9.53 mm Press In - Brass Insert
Out of Stock | Backorder Now | More stock due: 2 (20 pcs) around Wed, Jul 08, 2026 | Further orders can be expected around Wed, Jul 22, 2026
$10.86 AUD
$10.86 AUD
Per 10
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 - Brass Insert
Material: Brass    Knurled OD (B): 6.655 mm    Flange OD (A): 7.925   
Part Number: IN-EP-048F-095-FB (PK-10) Expansion Inserts - 10-32 UNF - 4.76mm - 6.35x9.53 mm Press In - Brass Insert
Out of Stock | Backorder Now | More stock due: 2 (20 pcs) around Wed, Jul 08, 2026 | Further orders can be expected around Wed, Jul 22, 2026
$10.86 AUD
$10.86 AUD
Per 10
View the product page first if you are unsure.
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 - Brass Insert
Material: Brass    Flange OD (A): 9.525   
Part Number: IN-EP-064C-127-FB (PK-10) Expansion Inserts - 1/4-20 UNC - 6.35mm - 7.938x12.7 mm Press In - Brass Insert
3 units (30 pcs) Available Now | Further orders can be expected around Wed, Jul 22, 2026
$10.14 AUD
$10.14 AUD
Per 10
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 - Brass Insert
Material: Brass    Knurled OD (B): 8.280 mm    Flange OD (A): 9.525   
Part Number: IN-EP-064C-127-FB (PK-10) Expansion Inserts - 1/4-20 UNC - 6.35mm - 7.938x12.7 mm Press In - Brass Insert
3 units (30 pcs) Available Now | Further orders can be expected around Wed, Jul 22, 2026
$10.14 AUD
$10.14 AUD
Per 10
View the product page first if you are unsure.
Internal Thread
5/16-18 UNC (7.94mm)
Rec. Hole Diameter
9.525
mm
Length (L)
14.30
mm
Knurled OD (B)
9.881
mm
Expansion Inserts - 5/16-18 UNC - 7.94mm - 9.525x14.3 mm Press In - Brass Insert
Material: Brass    Flange OD (A): 11.100   
Part Number: IN-EP-079C-143-FB (Each) Expansion Inserts - 5/16-18 UNC - 7.94mm - 9.525x14.3 mm Press In - Brass Insert
1 Available Now | Further orders can be expected around Wed, Jul 22, 2026
$0.86 AUD
$1.45 AUD $0.86 AUD
Each
Internal Thread
5/16-18 UNC (7.94mm)
Rec. Hole Diameter
9.525
mm
Length (L)
14.30
mm
Expansion Inserts - 5/16-18 UNC - 7.94mm - 9.525x14.3 mm Press In - Brass Insert
Material: Brass    Knurled OD (B): 9.881 mm    Flange OD (A): 11.100   
Part Number: IN-EP-079C-143-FB (Each) Expansion Inserts - 5/16-18 UNC - 7.94mm - 9.525x14.3 mm Press In - Brass Insert
1 Available Now | Further orders can be expected around Wed, Jul 22, 2026
$0.86 AUD
$1.45 AUD $0.86 AUD
Each
View the product page first if you are unsure.
Internal Thread
3/8-16 UNC (9.53mm)
Rec. Hole Diameter
11.100
mm
Length (L)
15.88
mm
Knurled OD (B)
11.455
mm
Expansion Inserts - 3/8-16 UNC - 9.53mm - 11.1x15.88 mm Press In - Brass Insert
Material: Brass    Flange OD (A): 12.700   
Part Number: IN-EP-095C-159-FB (PK-5) Expansion Inserts - 3/8-16 UNC - 9.53mm - 11.1x15.88 mm Press In - Brass Insert
2 units (10 pcs) Available Now | Further orders can be expected around Wed, Jul 22, 2026
$8.77 AUD
$15.50 AUD $8.77 AUD
Per 5
Internal Thread
3/8-16 UNC (9.53mm)
Rec. Hole Diameter
11.100
mm
Length (L)
15.88
mm
Expansion Inserts - 3/8-16 UNC - 9.53mm - 11.1x15.88 mm Press In - Brass Insert
Material: Brass    Knurled OD (B): 11.455 mm    Flange OD (A): 12.700   
Part Number: IN-EP-095C-159-FB (PK-5) Expansion Inserts - 3/8-16 UNC - 9.53mm - 11.1x15.88 mm Press In - Brass Insert
2 units (10 pcs) Available Now | Further orders can be expected around Wed, Jul 22, 2026
$8.77 AUD
$15.50 AUD $8.77 AUD
Per 5
View the product page first if you are unsure.