Inserts - Self Tapping - For Aluminium - Stainless 303

Inserts -> Self Tapping -> For Aluminium -> Stainless 303

There are 3 products in the sub-categories of Inserts - Self Tapping - For Aluminium - Stainless 303. Browse the Inserts - Self Tapping - For Aluminium - Stainless 303 products table.

Category Details

A selection of Stainless 303 For Aluminium Self Tapping Inserts. Threaded inserts are screwed into preformed or predrilled holes and cut their own threads into the wall of permanent installations.

  • Threaded bushing with external threads that cuts its own internal threads into a pre-drilled hole.
  • Creates a permanent, wear-resistant, and strong machine thread in materials such as aluminum, brass, cast iron, and plastics, without the need for a pre-tapped hole.
  • Used for strengthening materials, providing durable fastening points for machine screws, and repairing damaged threads.
  • Provides a strong wear and vibration resistant thread.
  • Low volumes can be installed by winding in with a bolt through the threaded centre. Large volumes can be installed with hand installation tools (Sold Seperately)
  • Hole sizes are reference only. Can vary on batches. Optimum hole size is to be determinded through experimentation.
  • A 60o countersink is required for flush mounting.
  • Can be used in Aluminium, aluminium alloy or magnesium. Made from 303 stainless steel.

Small Parts & Bearings

Additional resources:


A more comprehensive listing may be found in the Inserts - Self Tapping - For Aluminium - Stainless 303 category on the MBA Minibearings main store.
Internal Thread Rec. Hole Diameter Length (L) Outside Diameter (B) Indicative
Image
Self Tapping Inserts - 6-32 UNC - 3.5mm - 5.486x5 mm For Aluminium - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Internal Thread
6-32 UNC (3.5mm)

Rec. Hole Diameter
5.486
mm

(Equiv. 0.216 in.)
Length (L)
5.0
mm

(Equiv. 0.197 in.)
Outside Diameter (B)
5.994
mm
Self Tapping Inserts - 6-32 UNC - 3.5mm - 5.486x5 mm For Aluminium - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80    Required Hole Depth: 7.010 mm    Material to be used in: Aluminium, Aluminium Alloy, Magnesium and Mild Steel   
Part Number: IN-TP-035C-05-A-S3 (Each)
2 Available Now | Further orders can be expected around Sun, Jan 18, 2026
$7.77 AUD
$9.33 AUD $7.77 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 2 available can be backordered.
Internal Thread Rec. Hole Diameter Length (L) Outside Diameter (B) Indicative
Image
Self Tapping Inserts - 6-32 UNC - 3.5mm - 5.486x5 mm For Aluminium - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Internal Thread
6-32 UNC (3.5mm)

Rec. Hole Diameter
5.486
mm

(Equiv. 0.216 in.)
Length (L)
5.0
mm

(Equiv. 0.197 in.)
Outside Diameter (B)
5.994
mm
Self Tapping Inserts - 6-32 UNC - 3.5mm - 5.486x5 mm For Aluminium - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80    Required Hole Depth: 7.010 mm    Material to be used in: Aluminium, Aluminium Alloy, Magnesium and Mild Steel   
Part Number: IN-TP-035C-05-A-S3 (Each)
2 Available Now | Further orders can be expected around Sun, Jan 18, 2026
$7.77 AUD
$9.33 AUD $7.77 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

2 Available Now. Backorder if more than 2.
Self Tapping Inserts - 8-32 UNC - 4.17mm - 5.994x8 mm For Aluminium - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Internal Thread
8-32 UNC (4.17mm)

Rec. Hole Diameter
5.994
mm

(Equiv. 0.236 in.)
Length (L)
8.0
mm

(Equiv. 0.315 in.)
Outside Diameter (B)
6.502
mm
Self Tapping Inserts - 8-32 UNC - 4.17mm - 5.994x8 mm For Aluminium - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80    Required Hole Depth: 10.008 mm    Material to be used in: Aluminium, Aluminium Alloy, Magnesium and Mild Steel   
Part Number: IN-TP-042C-08-A-S3 (Each)
2 Available Now | Further orders can be expected around Sun, Jan 18, 2026
$9.32 AUD
$11.18 AUD $9.32 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

Larger quantities than the 2 available can be backordered.
Self Tapping Inserts - 8-32 UNC - 4.17mm - 5.994x8 mm For Aluminium - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Internal Thread
8-32 UNC (4.17mm)

Rec. Hole Diameter
5.994
mm

(Equiv. 0.236 in.)
Length (L)
8.0
mm

(Equiv. 0.315 in.)
Outside Diameter (B)
6.502
mm
Self Tapping Inserts - 8-32 UNC - 4.17mm - 5.994x8 mm For Aluminium - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80    Required Hole Depth: 10.008 mm    Material to be used in: Aluminium, Aluminium Alloy, Magnesium and Mild Steel   
Part Number: IN-TP-042C-08-A-S3 (Each)
2 Available Now | Further orders can be expected around Sun, Jan 18, 2026
$9.32 AUD
$11.18 AUD $9.32 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

2 Available Now. Backorder if more than 2.
Self Tapping Inserts - 5/16-18 UNC - 7.94mm - 11.1x13.7 mm For Aluminium - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Internal Thread
5/16-18 UNC (7.94mm)

Rec. Hole Diameter
11.100
mm

(Equiv. 0.437 in.)
Length (L)
13.7
mm

(Equiv. 0.539 in.)
Outside Diameter (B)
12.014
mm
Self Tapping Inserts - 5/16-18 UNC - 7.94mm - 11.1x13.7 mm For Aluminium - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80    Required Hole Depth: 10.998 mm    Material to be used in: Aluminium, Aluminium Alloy, Magnesium and Mild Steel   
Deleted Item. Available while stocks last.
Part Number: IN-TP-079C-13-A-S3 (Each)
10 Available Now | Item Discontinued - Up to 10 may be ordered online. No backorders. Please contact us if you need a larger quantity
$7.76 AUD
$9.32 AUD $7.76 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

10 Available Now. These are priced to quit. Please contact us for a quote if you require more.
Self Tapping Inserts - 5/16-18 UNC - 7.94mm - 11.1x13.7 mm For Aluminium - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Internal Thread
5/16-18 UNC (7.94mm)

Rec. Hole Diameter
11.100
mm

(Equiv. 0.437 in.)
Length (L)
13.7
mm

(Equiv. 0.539 in.)
Outside Diameter (B)
12.014
mm
Self Tapping Inserts - 5/16-18 UNC - 7.94mm - 11.1x13.7 mm For Aluminium - Stainless Steel 303/304 Similar to A2, 18-8 HRB80 Insert
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80    Required Hole Depth: 10.998 mm    Material to be used in: Aluminium, Aluminium Alloy, Magnesium and Mild Steel   
Deleted Item. Available while stocks last.
Part Number: IN-TP-079C-13-A-S3 (Each)
10 Available Now | Item Discontinued - Up to 10 may be ordered online. No backorders. Please contact us if you need a larger quantity
$7.76 AUD
$9.32 AUD $7.76 AUD
Each
Excludes GST and overseas Taxes & Duties
Quantity Required

10 Available Now. These are priced to quit. Please contact us for a quote if you require more.