|
| |
| Tap
Specifications |
| USCTI
Table 302 Standard Tap Dimensions for Ground Thread
|
|
Nominal
Diameter Range (inches) |
Machine
Screw Size Number |
Nominal
Fractional Diameter (inches) |
Nominal
Metric Diameter (mm) |
Style
|
Tap
Dimensions (inches) |
|
Over
|
Through
|
Over-all
Length
A
|
Thread
Length
B
|
Square
Length
C
|
Shank
Diameter D |
Size
of Square
E
|
| .052 |
.065 |
0 |
1/16 |
M1.6 |
1 |
1-5/8 |
5/16 |
3/16 |
.141 |
.110 |
| .065 |
.078 |
1 |
- |
M1.8 |
1 |
1-11/16 |
3/8 |
3/16 |
.141 |
.110 |
| .078 |
.091 |
2 |
- |
M2,M2.2 |
1 |
1-3/4 |
7/16 |
3/16 |
.141 |
.110 |
| .091 |
.104 |
3 |
3/32 |
M2.5 |
1 |
1-13/16 |
1/2 |
3/16 |
.141 |
.110 |
| .104 |
.117 |
4 |
- |
- |
1 |
1-7/8 |
9/16 |
3/16 |
.141 |
.110 |
| .117 |
.130 |
5 |
1/8 |
M3,
M3.15 |
1 |
1-15/16 |
5/8 |
3/16 |
.141 |
.110 |
| .130 |
.145 |
6 |
- |
M3.5 |
1 |
2 |
11/16 |
3/16 |
.141 |
.110 |
| .145 |
.171 |
8 |
5/32 |
M4 |
1 |
2-1/8 |
3/4 |
1/4 |
.168 |
.131 |
| .171 |
.197 |
10 |
3/16 |
M4.5,
M5 |
1 |
2-3/8 |
7/8 |
1/4 |
.194 |
.152 |
| .197 |
.223 |
12 |
7/32 |
- |
1 |
2-3/8 |
15/16 |
9/32 |
.220 |
.165 |
| .223 |
.260 |
14 |
1/4 |
M6,
M6.3 |
2 |
2-1/2 |
1 |
5/16 |
.255 |
.191 |
| .260 |
.323 |
- |
5/16 |
M7,
M8 |
2 |
2-23/32 |
1-1/8 |
3/8 |
.318 |
.238 |
| .323 |
.395 |
- |
3/8 |
M10 |
2 |
2-15/16 |
1-1/4 |
7/16 |
.381 |
.286 |
| .395 |
.448 |
- |
7/16 |
- |
3 |
3-5/32 |
1-7/16 |
13/32 |
.323 |
.242 |
| .448 |
.510 |
- |
1/2 |
M12,M12.5 |
3 |
3-3/8 |
1-21/32 |
7/16 |
.367 |
.275 |
| .510 |
.573 |
- |
9/16 |
M14 |
3 |
3-19/32 |
1-21/32 |
1/2 |
.429 |
.322 |
| .573 |
.635 |
- |
5/8 |
M16 |
3 |
3-13/16 |
1-13/16 |
9/16 |
.480 |
.360 |
| .635 |
.709 |
- |
11/16 |
M18 |
3 |
4-1/32 |
1-13/16 |
5/8 |
.542 |
.406 |
| .709 |
.760 |
- |
3/4 |
- |
3 |
4-1/4 |
2 |
11/16 |
.590 |
.442 |
|
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|
