RECOMMENDED TAP DRILL HOLE SIZE FOR HELICAL COIL WIRE INSERT
|
Nominalsize |
Hole dia |
Drill dia |
|
|
Max |
Min |
||
|
M2.5×0.45 |
2.65 |
2.60 |
2.6 |
|
M2.6×0.45 |
2.80 |
2.70 |
2.7 |
|
M3×0.5 |
3.20 |
3.12 |
3.1 |
|
M4×0.7 |
4.30 |
4.17 |
4.2 |
|
M5×0.8 |
5.33 |
5.16 |
5.2 |
|
M6×1.0 |
6.42 |
6.25 |
6.3 |
|
M8×1.25 |
8.52 |
8.31 |
8.4 |
|
M10×1.5 |
10.62 |
10.37 |
10.5 |
|
M12×1.75 |
12.73 |
12.43 |
12.5 |
|
M14×2.0 |
14.83 |
14.49 |
14.5 |
|
M16×2.0 |
16.83 |
16.49 |
16.5 |
|
M18×2.5 |
19.04 |
18.58 |
19.0 |
|
M20×2.5 |
21.04 |
20.58 |
21.0 |
|
M22×2.5 |
23.04 |
22.58 |
23.0 |
|
M24×3.0 |
25.25 |
24.70 |
25.0 |
|
Nominalsize |
Hole dia |
Drill dia |
|
|
Max |
Min |
||
|
M10×1.0 |
10.42 |
10.25 |
10.3 |
|
M10×1.25 |
10.52 |
10.31 |
10.4 |
|
M12×1.25 |
12.52 |
12.31 |
12.5 |
|
M12×1.5 |
12.62 |
12.37 |
12.5 |
|
M14×1.5 |
14.62 |
14.37 |
14.5 |
|
M16×1.5 |
16.62 |
16.37 |
16.5 |
|
M18×1.5 |
18.62 |
18.37 |
18.5 |
|
M20×1.5 |
20.62 |
20.37 |
20.5 |
|
M20×2.0 |
20.83 |
20.47 |
20.5 |
|
M22×1.5 |
22.62 |
22.37 |
22.5 |
|
M24×1.5 |
24.62 |
24.37 |
24.5 |
|
M24×2.0 |
24.83 |
24.47 |
24.5 |
|
M30×1.5 |
30.62 |
30.37 |
30.5 |
|
Nominalsize |
Hole dia |
Drill dia |
|
|
Max |
Min |
||
|
No.2-56UNC |
2.39 |
2.29 |
2.3 |
|
No.3-48UNC |
2.74 |
2.64 |
2.7 |
|
No.4-40UNC |
3.07 |
2.95 |
3.0 |
|
No.5-40UNC |
3.38 |
3.25 |
3.3 |
|
No.6-32UNC |
3.81 |
3.66 |
3.7 |
|
No.8-32UNC |
4.47 |
4.32 |
4.4 |
|
No.10-24UNC |
5.21 |
5.05 |
5.1 |
|
No.12-24UNC |
5.77 |
5.61 |
5.7 |
|
1/4-20UNC |
6.78 |
6.63 |
6.7 |
|
5/16-18UNC |
8.48 |
8.33 |
8.4 |
|
3/8-16UNC |
10.11 |
9.91 |
10.0 |
|
7/16-14UNC |
11.76 |
11.51 |
11.5 |
|
1/2-13UNC |
13.34 |
13.08 |
13.1 |
|
9/16-12UNC |
14.94 |
14.68 |
14.7 |
|
Nominalsize |
Hole dia |
Drill dia |
|
|
Max |
Min |
||
|
No.4-48UNF |
3.05 |
2.97 |
3.0 |
|
No.6-40UNF |
3.78 |
3.66 |
3.7 |
|
No.8-36UNF |
4.44 |
4.32 |
4.4 |
|
No.10-32UNF |
5.13 |
4.98 |
5.0 |
|
1/4-28UNF |
6.71 |
6.53 |
6.6 |
|
5/16-24UNF |
8.38 |
8.20 |
8.2 |
|
3/8-24UNF |
9.96 |
9.78 |
9.8 |
|
7/16-20UNF |
11.63 |
11.43 |
11.5 |
|
1/2-20UNF |
13.26 |
13.03 |
13.1 |
|
9/16-18UNF |
14.88 |
14.66 |
14.7 |
|
5/8-18UNF |
16.48 |
16.26 |
16.3 |
|
3/4-16UNF |
19.68 |
19.43 |
15.9 |
|
7/8-14UNF |
22.86 |
22.61 |
22.7 |
|
1-12UNF |
26.04 |
25.76 |
26.0 |