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Table 311 - Ground Thread
Pipe Tap Dimensions
Tolerances
NOMINAL
SIZE
INCHES |
DIMENSIONS - INCHES |
LENGTH
OVERALL
A |
LENGTH OF
THREAD
B |
LENGTH OF
SQUARE
C |
DIAM. OF
SHANK
D |
SIZE OF
SQUARE
E |
| 1/16 |
2-1/8 |
11/16 |
3/8 |
.3125 |
.234 |
| 1/8 |
2-1/8 |
3/4 |
3/8 |
.3125 |
.234 |
| 1/8 |
2-1/8 |
3/4 |
3/8 |
.4375 |
.328 |
| 1/4 |
2-7/16 |
1-1/16 |
7/16 |
.5625 |
.421 |
| 3/8 |
2-9/16 |
1-1/16 |
1/2 |
.7000 |
.531 |
| 1/2 |
3-1/8 |
1-3/8 |
5/8 |
.6875 |
.515 |
| 3/4 |
3-1/4 |
1-3/8 |
11/16 |
.9063 |
.679 |
| 1 |
3-3/4 |
1-3/4 |
13/16 |
1.1250 |
.843 |
| 1-1/4 |
4 |
1-3/4 |
15/16 |
1.3125 |
.984 |
| 1-1/2 |
4-1/4 |
1-3/4 |
1 |
1.5000 |
1.125 |
| 2 |
4-1/2 |
1-3/4 |
1-1/8 |
1.8750 |
1.406 |
| 2-1/2 |
5-1/2 |
2-9/16 |
1-1/4 |
2.2500 |
1.687 |
| 3 |
6 |
2-5/8 |
1-3/8 |
2.6250 |
1.968 |
| 3-1/2 |
6-1/2 |
2-11/16 |
1-1/2 |
2.8125 |
2.108 |
| 4 |
6-3/4 |
2-3/4 |
1-5/8 |
3.0000 |
2.250 |
Tolerances
| ELEMENT |
RANGE |
DIRECTION |
TOLERANCES |
| Length Overall - A |
1/16" to 3/4" incl. |
Plus or Minus |
1/32" |
|
1" to 4" incl. |
Plus or Minus |
1/16" |
| Length of Thread - B |
1/16" to 3/4" incl. |
Plus or Minus |
1/16" |
|
1" to 1-1/4" incl. |
Plus or Minus |
3/32" |
|
1-1/2" to 4" incl. |
Plus or Minus |
1/8" |
| Length of Square - C |
1/16" to 3/4" incl. |
Plus or Minus |
1/32" |
|
1" to 4" incl. |
Plus or Minus |
1/16" |
| Diameter of Shank - D |
1/16" to 1/8" incl. |
Minus |
.0015 |
|
1/4" to 1/2" incl. |
Minus |
.0020 |
|
3/4" to 1" incl. |
Minus |
.0020 |
|
1-1/4" to 4" incl. |
Minus |
.0030 |
| Size of Square - E |
1/16" to 1/8" incl. |
Minus |
.0040 |
|
1/8" to 3/4" incl. |
Minus |
.0060 |
|
1" to 4" incl. |
Minus |
.0080 |
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