ArmaCoil Technical Information - Screw Thread Insert Drill Sizes
METRIC |
||||||
Insert Size |
Drill Size |
Screw Thread Insert Length |
||||
1D |
1.5D |
2D |
2.5D |
3D |
||
M2 x 0.4 |
2.10 |
2.00 |
3.00 |
4.00 |
5.00 |
6.00 |
M2.2 x 0.45 |
2.30 |
2.20 |
3.30 |
4.40 |
5.50 |
6.60 |
M2.5 x 0.45 |
2.60 |
2.50 |
3.75 |
5.00 |
6.25 |
7.50 |
M3 x 0.5 |
3.10 |
3.00 |
4.50 |
6.00 |
7.50 |
9.00 |
M3.5 x 0.6 |
3.60 |
3.50 |
5.25 |
7.00 |
8.75 |
10.50 |
M4 x 0.7 |
4.10 |
4.00 |
6.00 |
8.00 |
10.00 |
12.00 |
M4.5 x 0.75 |
4.70 |
4.50 |
6.75 |
9.00 |
11.25 |
13.50 |
M5 x 0.8 |
5.20 |
5.00 |
7.50 |
10.00 |
12.50 |
15.00 |
M6 x 1.0 |
6.20 |
6.00 |
9.00 |
12.00 |
15.00 |
18.00 |
M7 x 1.0 |
7.20 |
7.00 |
10.50 |
14.00 |
17.50 |
21.00 |
M8 x 1.0 |
8.20 |
8.00 |
12.00 |
16.00 |
20.00 |
24.00 |
M8 x 1.25 |
8.30 |
8.00 |
12.00 |
16.00 |
20.00 |
24.00 |
M9 x 1.25 |
9.30 |
9.00 |
13.50 |
18.00 |
22.50 |
27.00 |
M10 x 1.0 |
10.30 |
10.00 |
15.00 |
20.00 |
25.00 |
30.00 |
M10 x 1.25 |
10.30 |
10.00 |
15.00 |
20.00 |
25.00 |
30.00 |
M10 x 1.5 |
10.30 |
10.00 |
15.00 |
20.00 |
25.00 |
30.00 |
M11 x 1.5 |
11.30 |
11.00 |
16.50 |
22.00 |
27.50 |
33.00 |
M12 x 1.25 |
12.30 |
12.00 |
18.00 |
24.00 |
30.00 |
36.00 |
M12 x 1.5 |
12.40 |
12.00 |
18.00 |
24.00 |
30.00 |
36.00 |
M12 x 1.75 |
12.40 |
12.00 |
18.00 |
24.00 |
30.00 |
36.00 |
M14 x 1.25 |
14.30 |
14.00 |
21.00 |
28.00 |
35.00 |
42.00 |
M14 x 1.5 |
14.30 |
14.00 |
21.00 |
28.00 |
35.00 |
42.00 |
M14 x 2.0 |
14.30 |
14.00 |
21.00 |
28.00 |
35.00 |
42.00 |
M16 x 1.5 |
16.25 |
16.00 |
24.00 |
32.00 |
40.00 |
48.00 |
M16 x 2.0 |
16.50 |
16.00 |
24.00 |
32.00 |
40.00 |
48.00 |
M18 x 1.5 |
18.25 |
18.00 |
27.00 |
36.00 |
45.00 |
54.00 |
M18 x 2.0 |
18.50 |
18.00 |
27.00 |
36.00 |
45.00 |
54.00 |
M18 x 2.5 |
18.50 |
18.00 |
27.00 |
36.00 |
45.00 |
54.00 |
M20 x 1.5 |
20.25 |
20.00 |
30.00 |
40.00 |
50.00 |
60.00 |
M20 x 2.0 |
20.50 |
20.00 |
30.00 |
40.00 |
50.00 |
60.00 |
M20 x 2.5 |
20.50 |
20.00 |
30.00 |
40.00 |
50.00 |
60.00 |
M22 x 1.5 |
22.50 |
22.00 |
33.00 |
44.00 |
55.00 |
66.00 |
M22 x 2.0 |
22.50 |
22.00 |
33.00 |
44.00 |
55.00 |
66.00 |
M22 x 2.5 |
22.50 |
22.00 |
33.00 |
44.00 |
55.00 |
66.00 |
M24 x 1.5 |
24.25 |
24.00 |
36.00 |
48.00 |
60.00 |
72.00 |
M24 x 2.0 |
24.25 |
24.00 |
36.00 |
48.00 |
60.00 |
72.00 |
M24 x 3.0 |
24.75 |
24.00 |
36.00 |
48.00 |
60.00 |
72.00 |
M27 x 2 |
27.50 |
27.00 |
40.50 |
54.00 |
67.50 |
81.00 |
M27 x 3.0 |
27.50 |
27.00 |
40.50 |
54.00 |
67.50 |
81.00 |
M30 x 1.5 |
30.50 |
30.00 |
45.00 |
60.00 |
75.00 |
90.00 |
M30 x 2.0 |
30.50 |
30.00 |
45.00 |
60.00 |
75.00 |
90.00 |
M30 x 3.5 |
30.50 |
30.00 |
45.00 |
60.00 |
75.00 |
90.00 |
M33 x 2.0 |
33.50 |
33.00 |
49.50 |
66.00 |
82.50 |
99.00 |
M36 x 2.0 |
36.50 |
36.00 |
54.00 |
72.00 |
90.00 |
108.00 |
M36 x 4.0 |
36.50 |
36.00 |
54.00 |
72.00 |
90.00 |
108.00 |
M39 x 2.0 |
39.50 |
39.00 |
58.50 |
78.00 |
97.50 |
117.00 |
M39 x 4.0 |
39.50 |
39.00 |
58.50 |
78.00 |
97.50 |
117.00 |
UNC |
||||||
Insert Size |
Drill Size |
Wire Thread Insert Length |
||||
1D |
1.5D |
2D |
2.5D |
3D |
||
2-56 |
2.3 mm |
0.086 |
0.129 |
0.172 |
0.215 |
0.258 |
3-48 |
2.7 mm |
0.099 |
0.148 |
0.198 |
0.248 |
0.297 |
4-40 |
3.0 mm |
0.112 |
0.168 |
0.224 |
0.280 |
0.336 |
5-40 |
3.4 mm |
0.125 |
0.188 |
0.250 |
0.312 |
0.375 |
6-32 |
3.7 mm |
0.138 |
0.207 |
0.276 |
0.345 |
0.414 |
8-32 |
11/64 |
0.164 |
0.246 |
0.328 |
0.410 |
0.492 |
10-24 |
5.1 mm |
0.190 |
0.285 |
0.380 |
0.475 |
0.570 |
12-24 |
5.8 mm |
0.216 |
0.324 |
0.432 |
0.540 |
0.648 |
1/4-20 |
6.7 mm |
0.250 |
0.375 |
0.500 |
0.625 |
0.750 |
5/16-18 |
8.3 mm |
0.312 |
0.469 |
0.625 |
0.781 |
0.938 |
3/8-16 |
9.9 mm |
0.375 |
0.562 |
0.750 |
0.938 |
1.125 |
7/16-14 |
29/64 |
0.438 |
0.656 |
0.875 |
1.094 |
1.313 |
1/2-13 |
33/64 |
0.500 |
0.750 |
1.000 |
1.250 |
1.500 |
9/16-12 |
14.75 mm |
0.562 |
0.844 |
1.125 |
1.406 |
1.688 |
5/8-11 |
16.5 mm |
0.625 |
0.938 |
1.250 |
1.563 |
1.875 |
3/4-10 |
19.75 mm |
0.750 |
1.125 |
1.500 |
1.875 |
2.250 |
7/8-9 |
23.0 mm |
0.875 |
1.313 |
1.750 |
2.188 |
2.625 |
1-8 |
1-1/32 |
1.000 |
1.500 |
2.000 |
2.500 |
3.000 |
1.1/8-7 |
1-5/32 |
1.125 |
1.688 |
2.250 |
2.813 |
3.375 |
1.1/4-7 |
1-9/32 |
1.250 |
1.875 |
2.500 |
3.125 |
3.750 |
1.3/8-6 |
36.0 |
1.375 |
2.063 |
2.750 |
3.438 |
4.125 |
1.1/2-6 |
1-35/64 |
1.500 |
2.250 |
3.000 |
3.750 |
4.500 |
UNF |
||||||
Insert Size |
Drill Size |
Wire Thread Insert Length |
||||
1D |
1.5D |
2D |
2.5D |
3D |
||
2-64 |
2.3 mm |
0.086 |
0.129 |
0.172 |
0.215 |
0.258 |
3-56 |
2.65 mm |
0.099 |
0.148 |
0.198 |
0.248 |
0.297 |
4-48 |
3.0 mm |
0.112 |
0.168 |
0.224 |
0.280 |
0.336 |
5-44 |
3.3 mm |
0.125 |
0.188 |
0.250 |
0.312 |
0.375 |
6-40 |
3.7 mm |
0.138 |
0.207 |
0.276 |
0.345 |
0.414 |
8-36 |
11/64 |
0.164 |
0.246 |
0.328 |
0.410 |
0.492 |
10-32 |
5.1 mm |
0.190 |
0.285 |
0.380 |
0.475 |
0.570 |
1/4-28 |
6.6 mm |
0.250 |
0.375 |
0.500 |
0.625 |
0.750 |
5/16-24 |
8.2 mm |
0.312 |
0.469 |
0.625 |
0.781 |
0.938 |
3/8-24 |
9.8 mm |
0.375 |
0.562 |
0.750 |
0.938 |
1.125 |
7/16-20 |
29/64 |
0.438 |
0.656 |
0.875 |
1.094 |
1.313 |
1/2-20 |
33/64 |
0.500 |
0.750 |
1.000 |
1.250 |
1.500 |
9/16-18 |
37/64 |
0.562 |
0.844 |
1.125 |
1.406 |
1.688 |
5/8-18 |
41/64 |
0.625 |
0.938 |
1.250 |
1.563 |
1.875 |
3/4-16 |
49/64 |
0.750 |
1.125 |
1.500 |
1.875 |
2.250 |
7/8-14 |
22.75 mm |
0.875 |
1.313 |
1.750 |
2.188 |
2.625 |
1-12 |
26.0 mm |
1.000 |
1.500 |
2.000 |
2.500 |
3.000 |
1.1/8-12 |
29.25 mm |
1.125 |
1.688 |
2.250 |
2.813 |
3.375 |
1.1/4-12 |
1-17/64 |
1.250 |
1.875 |
2.500 |
3.125 |
3.750 |
1.3/8-12 |
35.5 mm |
1.375 |
2.063 |
2.750 |
3.438 |
4.125 |
1.1/2-12 |
38.5 mm |
1.500 |
2.250 |
3.000 |
3.750 |
4.500 |
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