Size |
Equivalent to mm |
BSW |
BSF |
UNC |
UNF |
||||||||
PITCH |
PITCH |
PITCH |
PITCH |
||||||||||
TPI |
INCH |
METRIC |
TPI |
INCH |
METRIC |
TPI |
INCH |
METRIC |
TPI |
INCH |
METRIC |
||
No. 1 |
1.854 |
- |
- |
- |
- |
- |
- |
64 |
0.016 |
0.397 |
72 |
0.014 |
0.353 |
No. 2 |
2.184 |
- |
- |
- |
- |
- |
- |
56 |
0.018 |
0.454 |
64 |
0.016 |
0.397 |
No. 3 |
2.515 |
- |
- |
- |
- |
- |
- |
48 |
0.021 |
0.529 |
56 |
0.018 |
0.454 |
No. 4 |
2.845 |
- |
- |
- |
- |
- |
- |
40 |
0.025 |
0.635 |
48 |
0.021 |
0.529 |
No. 5 |
3.175 |
- |
- |
- |
- |
- |
- |
40 |
0.025 |
0.635 |
44 |
0.023 |
0.577 |
No. 6 |
3.505 |
- |
- |
- |
- |
- |
- |
32 |
0.031 |
0.794 |
40 |
0.025 |
0.635 |
No. 8 |
4.166 |
- |
- |
- |
- |
- |
- |
32 |
0.031 |
0.794 |
36 |
0.028 |
0.706 |
No. 10 |
4.826 |
- |
- |
- |
- |
- |
- |
24 |
0.041 |
1.058 |
32 |
0.031 |
0.794 |
No. 12 |
5.486 |
- |
- |
- |
- |
- |
- |
24 |
0.041 |
1.058 |
28 |
0.036 |
0.907 |
1/8" |
3.175 |
40 |
0.025 |
0.635 |
- |
- |
- |
- |
- |
- |
- |
- |
- |
3/16" |
4.762 |
24 |
0.041 |
1.058 |
32 |
0.031 |
0.794 |
- |
- |
- |
- |
- |
- |
1/4" |
6.350 |
20 |
0.050 |
1.270 |
26 |
0.038 |
0.977 |
20 |
0.050 |
1.270 |
28 |
0.036 |
0.907 |
5/16" |
7.938 |
18 |
0.055 |
1.411 |
22 |
0.045 |
1.154 |
18 |
0.055 |
1.411 |
24 |
0.041 |
1.058 |
3/8" |
9.525 |
16 |
0.062 |
1.588 |
20 |
0.050 |
1.270 |
16 |
0.062 |
1.588 |
24 |
0.041 |
1.058 |
7/16" |
11.112 |
14 |
0.071 |
1.814 |
18 |
0.055 |
1.411 |
14 |
0.071 |
1.814 |
20 |
0.050 |
1.270 |
1/2" |
12.700 |
20 |
0.083 |
2.117 |
16 |
0.062 |
1.588 |
13 |
0.077 |
1.954 |
20 |
0.050 |
1.270 |
9/16" |
14.288 |
12 |
0.083 |
2.117 |
16 |
0.062 |
1.588 |
12 |
0.083 |
2.117 |
18 |
0.055 |
1.411 |
5/8" |
15.875 |
11 |
0.091 |
2.309 |
14 |
0.071 |
1.814 |
11 |
0.091 |
2.309 |
18 |
0.055 |
1.411 |
11/16" |
17.462 |
11 |
0.091 |
2.309 |
14 |
0.071 |
1.814 |
- |
- |
- |
- |
- |
- |
3/4" |
19.050 |
10 |
0.100 |
2.540 |
12 |
0.083 |
2.117 |
10 |
0.100 |
2.540 |
16 |
0.062 |
1.588 |
7/8" |
22.225 |
9 |
0.111 |
2.822 |
11 |
0.091 |
2.309 |
9 |
0.111 |
2.822 |
14 |
0.071 |
1.814 |
1" |
25.400 |
8 |
0.125 |
3.175 |
10 |
0.100 |
2.540 |
8 |
0.125 |
3.175 |
12 |
0.083 |
2.117 |
1.1/8" |
28.575 |
7 |
0.143 |
3.629 |
9 |
0.111 |
2.872 |
7 |
0.143 |
3.629 |
12 |
0.083 |
2.117 |
1.1/4" |
31.750 |
7 |
0.143 |
3.629 |
9 |
0.111 |
2.872 |
7 |
0.143 |
3.629 |
12 |
0.083 |
2.117 |
1.3/8" |
34.925 |
6 |
0.166 |
4.233 |
8 |
0.125 |
3.175 |
6 |
0.166 |
4.233 |
12 |
0.083 |
2.117 |
1.1/2" |
38.100 |
6 |
0.166 |
4.233 |
8 |
0.125 |
3.175 |
6 |
0.166 |
4.233 |
12 |
0.083 |
2.117 |
1.5/8" |
41.275 |
5 |
0.200 |
5.080 |
8 |
0.125 |
3.175 |
- |
- |
- |
- |
- |
- |
1.3/4" |
44.450 |
5 |
0.200 |
5.080 |
7 |
0.143 |
3.629 |
5 |
0.200 |
5.080 |
- |
- |
- |
2" |
50.800 |
5 |
0.222 |
5.644 |
7 |
0.143 |
3.629 |
4.5 |
0.222 |
5.644 |
- |
- |
- |
2.1/4" |
57.150 |
4 |
0.250 |
6.350 |
6 |
0.166 |
4.233 |
4.5 |
0.222 |
5.644 |
- |
- |
- |
2.1/2" |
63.500 |
4 |
0.250 |
6.350 |
6 |
0.166 |
4.233 |
4 |
0.250 |
6.350 |
- |
- |
- |
2.3/4" |
69.850 |
4 |
0.285 |
7.257 |
5 |
0.166 |
4.233 |
4 |
0.250 |
6.350 |
- |
- |
- |
3" |
76.200 |
4 |
0.285 |
7.257 |
5 |
0.200 |
5.080 |
4 |
0.250 |
6.350 |
- |
- |
- |
3.1/2" |
88.900 |
3 |
0.308 |
7.832 |
- |
- |
- |
- |
- |
- |
- |
- |
- |
4" |
101.600 |
3 |
0.333 |
8.458 |
- |
- |
- |
- |
- |
- |
- |
- |
- |
5" |
127.000 |
3 |
0.363 |
9.220 |
- |
- |
- |
- |
- |
- |
- |
- |
- |
6" |
152.400 |
3 |
0.400 |
10.160 |
- |
- |
- |
- |
- |
- |
- |
- |
- |