Self-Tapping Inserts: Your Solution for Strong, Reliable Thread Connections
Why Choose Our Self-Tapping Inserts?
✅No Pre-Tapping Required: Integrated cutting edges eliminate the need for pre-threaded holes, slashing installation steps.
✅Superior Load-Bearing Capacity: Reinforces weak threads in soft materials (aluminum, plastic, die-cast parts) by distributing stress evenly.
✅Corrosion Resistance: Crafted from premium materials with advanced surface treatments for long-term durability in harsh environments.
✅Wide Compatibility: Works with standard bolts (metric/imperial) and fits diverse pilot hole sizes—no custom tools needed.
302 series Self tapping thread insert parameter
Table of dimensions for self-tapping threaded inserts
|
Metric size Type 302 Self-Tapping Thread Insert |
|||||
|
Internal thread |
External thread
|
Length |
Guideline values for receiving hole diameter |
Minimum borehole depth for blind holes |
|
|
A |
E |
P |
B |
L |
T |
|
M2 |
4.5 |
0.5 |
6 |
4.2 to 4.3 |
8 |
|
M2.5 |
4.5 |
0.5 |
6 |
4.2 to 4.3 |
8 |
|
M3 |
5 |
0.5 |
6 |
4.7 to 4.8 |
8 |
|
M3.5 |
6 |
0.75 |
8 |
5.6 to 5.7 |
10 |
|
M4 |
6.5 |
0.75 |
8 |
6.1 to 6.2 |
10 |
|
M5 |
8 |
1 |
10 |
7.5 to 7.6 |
13 |
|
M6(a) |
9 |
1 |
12 |
8.5 to 8.6 |
15 |
|
M6 |
10 |
1.5 |
14 |
9.2 to 9.4 |
17 |
|
M8 |
12 |
1.5 |
15 |
11.2 to11.4 |
18 |
|
M10 |
14 |
1.5 |
18 |
13.2 to13.4 |
22 |
|
M12 |
16 |
1.5 |
22 |
15.2 to15.4 |
26 |
|
M14 |
18 |
1.5 |
24 |
17.2 to17.4 |
28 |
|
M16 |
20 |
1.5 |
22 |
19.2 to19.4 |
26 |
|
M18 |
22 |
1.5 |
24 |
21.2 to21.4 |
29 |
|
M20 |
26 |
1.5 |
27 |
25.2 to25.4 |
32 |
|
M22 |
26 |
1.5 |
30 |
25.2 to25.4 |
36 |
|
M24 |
30 |
1.5 |
30 |
29.2 to29.4 |
36 |
|
M27 |
34 |
1.5 |
30 |
33.2 to33.4 |
36 |
|
M30 |
36 |
1.5 |
40 |
35.2 to35.4 |
46 |
|
Inch size Type 302 Self-Tapping Thread Insert |
|||||
|
Internal thread |
External thread
|
Length |
Minimum borehole depth |
||
|
UNC |
UNF |
E |
P |
B |
T |
|
4-40 |
4-48 |
5 |
0.5 |
6 |
8 |
|
6-32 |
6-40 |
6 |
0.75 |
8 |
10 |
|
8-32 |
8-36 |
6.5 |
0.75 |
8 |
10 |
|
10-24 |
10-32 |
8 |
1 |
10 |
13 |
|
1/4-20 |
1/4-28 |
10 |
1.5 |
14 |
17 |
|
5/16-18 |
5/16-24 |
12 |
1.5 |
15 |
18 |
|
3/8-16 |
3/8-24 |
14 |
1.5 |
18 |
22 |
|
7/16-14 |
7/16-20 |
16 |
1.5 |
22 |
26 |
|
1/2-13 |
1/2-20 |
18 |
1.5 |
22 |
28 |
|
5/8-11 |
5/8-18 |
20 |
1.5 |
22 |
27 |
How It Works: Simple 3-Step Installation
1. Drill Pilot Hole: Use a standard drill bit to create an unthreaded pilot hole (size matches insert size —see our size chart for details).
2. Drive the Insert: Use a standard wrench or driver to screw the insert into the pilot hole. The external cutting edges will form precise threads in the workpiece.
3. Secure Fastener: Thread your bolt or screw into the insert’s internal thread—done!
