|
UNC Thread Size |
Diameter Inch |
Diameter Metric |
Allen Key Size mm |
TPI |
Thread Pitch mm |
|
8 - 32 UNC |
0.164" |
4.166 |
9/64" |
32 |
0.794 |
|
10 - 24 UNC |
0.190" |
4.826 |
5/32" |
24 |
1.058 |
|
12 - 24 UNC |
0.216" |
5.486 |
5/32" |
24 |
1.058 |
|
1/4" - 20 UNC |
0.250" |
6.350 |
3/16" |
20 |
1.270 |
|
5/16" - 18 UNC |
0.313" |
7.938 |
1/4" |
18 |
1.411 |
|
3/8" - 16 UNC |
0.375" |
9.525 |
5/16" |
16 |
1.587 |
|
7/16" - 14 UNC |
0.438" |
11.112 |
3/8" |
14 |
1.814 |
|
1/2" - 13 UNC |
0.500" |
12.700 |
3/8" |
13 |
1.954 |