Inserts - Self Tapping - For Aluminium - Stainless 303

6 Products in this selection
  • Threaded inserts are screwed into preformed or predrilled holes and cut their own threads into the wall of permanent installations.
  • 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.
Miniature Bearings Australia (Minibearings)

Additional resources:
Assortment Kits
A more concise listing may be found on the Smallparts store at Inserts - Self Tapping - For Aluminium - Stainless 303. Smallparts promote the most popular MBA products.
Internal Thread Rec. Hole Diameter Length (L) Outside Diameter (B) Indicative
Image
Internal Thread
6-32 UNC (3.5mm)
Rec. Hole Diameter
5.486
mm

(0.216 in.)
Length (L)
5.0
mm

(0.197 in.)
Outside Diameter (B)
5.994
mm
Self Tapping Inserts - 6-32 UNC -3.5mm- 5.486x5 mm - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
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-0350C-050-A-S3 Self Tapping Inserts - 6-32 UNC - 3.5mm - 5.486x5 mm - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
2 Available Immediately | Item Discontinued - Up to 2 may be ordered online. No backorders. Please contact us if you need a larger quantity
$6.14 AUD
$10.48 AUD $6.14 AUD
Each
Internal Thread Rec. Hole Diameter Length (L) Outside Diameter (B) Indicative
Image
Internal Thread
6-32 UNC (3.5mm)
Rec. Hole Diameter
5.486
mm

(0.216 in.)
Length (L)
5.0
mm

(0.197 in.)
Outside Diameter (B)
5.994
mm
Self Tapping Inserts - 6-32 UNC -3.5mm- 5.486x5 mm - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
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-0350C-050-A-S3 Self Tapping Inserts - 6-32 UNC - 3.5mm - 5.486x5 mm - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
2 Available Immediately | Item Discontinued - Up to 2 may be ordered online. No backorders. Please contact us if you need a larger quantity
$6.14 AUD
$10.48 AUD $6.14 AUD
Each
Internal Thread
8-32 UNC (4.17mm)
Rec. Hole Diameter
5.994
mm

(0.236 in.)
Length (L)
6.0
mm

(0.236 in.)
Outside Diameter (B)
6.502
mm
Self Tapping Inserts - 8-32 UNC -4.17mm- 5.994x6 mm - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80    Required Hole Depth: 8.001 mm    Material to be used in: Aluminium, Aluminium Alloy, Magnesium and Mild Steel   
Part Number: IN-TP-0417C-060-A-S3 (100 Pcs) Self Tapping Inserts - 8-32 UNC - 4.17mm - 5.994x6 mm For Aluminium - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
Out of Stock | Backorder Now | Orders can be expected around Tue, Jul 15, 2025
$1,102.59 AUD
$1,323.11 AUD $1,102.59 AUD
Per 100
Internal Thread
8-32 UNC (4.17mm)
Rec. Hole Diameter
5.994
mm

(0.236 in.)
Length (L)
6.0
mm

(0.236 in.)
Outside Diameter (B)
6.502
mm
Self Tapping Inserts - 8-32 UNC -4.17mm- 5.994x6 mm - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80    Required Hole Depth: 8.001 mm    Material to be used in: Aluminium, Aluminium Alloy, Magnesium and Mild Steel   
Part Number: IN-TP-0417C-060-A-S3 (100 Pcs) Self Tapping Inserts - 8-32 UNC - 4.17mm - 5.994x6 mm For Aluminium - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
Out of Stock | Backorder Now | Orders can be expected around Tue, Jul 15, 2025
$1,102.59 AUD
$1,323.11 AUD $1,102.59 AUD
Per 100
View the product page first if you are unsure.
Internal Thread
8-32 UNC (4.17mm)
Rec. Hole Diameter
5.994
mm

(0.236 in.)
Length (L)
8.0
mm

(0.315 in.)
Outside Diameter (B)
6.502
mm
Self Tapping Inserts - 8-32 UNC -4.17mm- 5.994x8 mm - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
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-0417C-080-A-S3 Self Tapping Inserts - 8-32 UNC - 4.17mm - 5.994x8 mm - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
2 Available Immediately | Item Discontinued - Up to 2 may be ordered online. No backorders. Please contact us if you need a larger quantity
$7.32 AUD
$12.58 AUD $7.32 AUD
Each
Internal Thread
8-32 UNC (4.17mm)
Rec. Hole Diameter
5.994
mm

(0.236 in.)
Length (L)
8.0
mm

(0.315 in.)
Outside Diameter (B)
6.502
mm
Self Tapping Inserts - 8-32 UNC -4.17mm- 5.994x8 mm - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
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-0417C-080-A-S3 Self Tapping Inserts - 8-32 UNC - 4.17mm - 5.994x8 mm - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
2 Available Immediately | Item Discontinued - Up to 2 may be ordered online. No backorders. Please contact us if you need a larger quantity
$7.32 AUD
$12.58 AUD $7.32 AUD
Each
Internal Thread
1/4-20 UNC (6.35mm)
Rec. Hole Diameter
9.296
mm

(0.366 in.)
Length (L)
8.0
mm

(0.315 in.)
Outside Diameter (B)
10.008
mm
Self Tapping Inserts - 1/4-20 UNC -6.35mm- 9.296x8 mm - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
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-0635C-080-A-S3 Self Tapping Inserts - 1/4-20 UNC - 6.35mm - 9.296x8 mm - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
Out of Stock | Backorder Now | Orders can be expected around Tue, Jul 15, 2025
$10.23 AUD
$12.27 AUD $10.23 AUD
Each
Internal Thread
1/4-20 UNC (6.35mm)
Rec. Hole Diameter
9.296
mm

(0.366 in.)
Length (L)
8.0
mm

(0.315 in.)
Outside Diameter (B)
10.008
mm
Self Tapping Inserts - 1/4-20 UNC -6.35mm- 9.296x8 mm - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
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-0635C-080-A-S3 Self Tapping Inserts - 1/4-20 UNC - 6.35mm - 9.296x8 mm - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
Out of Stock | Backorder Now | Orders can be expected around Tue, Jul 15, 2025
$10.23 AUD
$12.27 AUD $10.23 AUD
Each
View the product page first if you are unsure.
Internal Thread
5/16-18 UNC (7.94mm)
Rec. Hole Diameter
11.100
mm

(0.437 in.)
Length (L)
13.7
mm

(0.539 in.)
Outside Diameter (B)
12.014
mm
Self Tapping Inserts - 5/16-18 UNC -7.94mm- 11.1x13.7 mm - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
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   
Part Number: IN-TP-0794C-137-A-S3 Self Tapping Inserts - 5/16-18 UNC - 7.94mm - 11.1x13.7 mm - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
10 Available Immediately | 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
Internal Thread
5/16-18 UNC (7.94mm)
Rec. Hole Diameter
11.100
mm

(0.437 in.)
Length (L)
13.7
mm

(0.539 in.)
Outside Diameter (B)
12.014
mm
Self Tapping Inserts - 5/16-18 UNC -7.94mm- 11.1x13.7 mm - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
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   
Part Number: IN-TP-0794C-137-A-S3 Self Tapping Inserts - 5/16-18 UNC - 7.94mm - 11.1x13.7 mm - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
10 Available Immediately | 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
Internal Thread
5/16-18 UNC (7.94mm)
Rec. Hole Diameter
11.100
mm

(0.437 in.)
Length (L)
14.0
mm

(0.551 in.)
Outside Diameter (B)
12.014
mm
Self Tapping Inserts - 5/16-18 UNC -7.94mm- 11.1x14 mm - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80    Required Hole Depth: 16.993 mm    Material to be used in: Aluminium, Aluminium Alloy, Magnesium and Mild Steel   
Part Number: IN-TP-0794C-140-A-S3 (100 Pcs) Self Tapping Inserts - 5/16-18 UNC - 7.94mm - 11.1x14 mm For Aluminium - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
Out of Stock | Backorder Now | Orders can be expected around Tue, Jul 15, 2025
$1,554.32 AUD
$1,865.18 AUD $1,554.32 AUD
Per 100
Internal Thread
5/16-18 UNC (7.94mm)
Rec. Hole Diameter
11.100
mm

(0.437 in.)
Length (L)
14.0
mm

(0.551 in.)
Outside Diameter (B)
12.014
mm
Self Tapping Inserts - 5/16-18 UNC -7.94mm- 11.1x14 mm - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
Material: Stainless Steel 303/304 (Similar to A2, 18-8) HRB80    Required Hole Depth: 16.993 mm    Material to be used in: Aluminium, Aluminium Alloy, Magnesium and Mild Steel   
Part Number: IN-TP-0794C-140-A-S3 (100 Pcs) Self Tapping Inserts - 5/16-18 UNC - 7.94mm - 11.1x14 mm For Aluminium - Stainless Steel 303/304 Similar to A2, 18-8 HRB80
Out of Stock | Backorder Now | Orders can be expected around Tue, Jul 15, 2025
$1,554.32 AUD
$1,865.18 AUD $1,554.32 AUD
Per 100
View the product page first if you are unsure.