Standard: ISO (Coarse) |
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Nominal Thread (D) |
Pitch |
Wrench Size (S) |
M2 |
0.40 |
4.0 |
M2.5 |
0.45 |
5.0 |
M3 |
0.50 |
5.5 |
M3.5 |
0.60 |
6.0 |
M4 |
0.70 |
7.0 |
M5 |
0.75 |
8.0 |
M6 |
0.80 |
10.0 |
M7 |
1.00 |
11.0 |
M8 |
1.25 |
13.0 |
M10 |
1.50 |
16.0 |
M12 |
1.75 |
18.0 |
M14 |
2.00 |
21.0 |
M16 |
2.00 |
24.0 |
M18 |
2.50 |
27.0 |
M20 |
2.50 |
30.0 |
M22 |
2.50 |
34.0 |
M24 |
3.00 |
36.0 |
M27 |
3.00 |
41.0 |
M30 |
3.50 |
46.0 |
M33 |
3.50 |
50.0 |
M36 |
4.00 |
55.0 |
M39 |
4.00 |
60.0 |
M42 |
4.50 |
65.0 |
M45 |
4.50 |
70.0 |
M48 |
5.00 |
75.0 |
M52 |
5.00 |
80.0 |
Standard: ISO (Fine) |
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Nominal Thread (D) |
Pitch |
Wrench Size (S) |
M8 |
1.00 |
13.0 |
M10 |
1.00 |
16.0 |
M10 |
1.25 |
16.0 |
M12 |
1.25 |
18.0 |
M12 |
1.50 |
18.0 |
M14 |
1.50 |
21.0 |
M16 |
1.50 |
24.0 |
M18 |
1.50 |
27.0 |
M18 |
2.00 |
27.0 |
M20 |
1.50 |
30.0 |
M20 |
2.00 |
30.0 |
M22 |
1.50 |
34.0 |
M22 |
2.00 |
34.0 |
M24 |
2.00 |
36.0 |
M27 |
2.00 |
41.0 |
M30 |
2.00 |
46.0 |
M33 |
2.00 |
50.0 |
M36 |
3.00 |
55.0 |
M39 |
3.00 |
60.0 |
M42 |
3.00 |
65.0 |
M45 |
3.00 |
70.0 |
M48 |
3.00 |
75.0 |
M52 |
4.00 |
80.0 |
Standard: UNC |
||
Nominal Thread (D) |
TPI |
Wrench Size (S) |
1/4'' |
20 |
1/2'' |
5/16'' |
18 |
9/16'' |
3/8'' |
16 |
11/16'' |
7/16'' |
14 |
3/4'' |
1/2'' |
13 |
7/8'' |
9/16'' |
12 |
15/16'' |
5/8'' |
11 |
1-1/16'' |
3/4'' |
10 |
1-1/4'' |
7/8'' |
9 |
1-7/16'' |
1'' |
8 |
1-5/8'' |
1-1/8'' |
7 |
1-13/16'' |
1-1/4'' |
7 |
2'' |
1-3/8'' |
6 |
2-3/16'' |
1-1/2'' |
6 |
2-3/8'' |
1-3/4'' |
5 |
2-3/4'' |
2'' |
4.5 |
3-1/8'' |
Standard: UNF |
||
Nominal Thread (D) |
TPI |
Wrench Size (S) |
1/4'' |
28 |
1/2'' |
5/16'' |
24 |
9/16'' |
3/8'' |
24 |
11/16'' |
7/16'' |
20 |
3/4'' |
1/2'' |
20 |
7/8'' |
9/16'' |
18 |
15/16'' |
5/8'' |
18 |
1-1/16'' |
3/4'' |
16 |
1-1/4'' |
7/8'' |
14 |
1-7/16'' |
1'' |
12 |
1-5/8'' |
1-1/8'' |
12 |
1-13/16'' |
1-1/4'' |
12 |
2'' |
1-3/8'' |
12 |
2-3/16'' |
1-1/2'' |
12 |
2-3/8'' |
Standard: BSW |
||
Nominal Thread (D) |
TPI |
Wrench Size (S) |
1/4'' |
20 |
7/16'' |
5/16'' |
18 |
1/2'' |
3/8'' |
16 |
9/16'' |
7/16'' |
14 |
11/16'' |
1/2'' |
12 |
3/4'' |
9/16'' |
12 |
7/8'' |
5/8'' |
11 |
15/16'' |
3/4'' |
11 |
1-1/8'' |
7/8'' |
10 |
1-5/16'' |
1'' |
9 |
1-1/2'' |
1-1/8'' |
8 |
1-11/16'' |
1-1/4'' |
7 |
1-7/8'' |
1-3/8'' |
6 |
2-1/16'' |
1-1/2'' |
6 |
2-1/4'' |
1-5/8'' |
5 |
2-7/16'' |
1-3/4'' |
5 |
2-5/8'' |