Nominal diameter | BSW (W) | UNC | UNF | UNEF | BSF | Thread diameter | Nominal diameter | BSP (G) | Thread diameter | |
Inch | TPI | TPI | TPI | TPI | TPI | mm | Inch | TPI | mm | |
No. 0 | - | - | 80 | - | - | 1,520 | G 1/8" | 28 | 9,728 | |
No. 1 | - | 64 | 72 | - | - | 1,850 | G 1/4" | 19 | 13,157 | |
No. 2 | - | 56 | 64 | - | - | 2,180 | G 3/8" | 19 | 16,662 | |
No. 3 | - | 48 | 56 | - | - | 2,520 | G 1/2" | 14 | 20,955 | |
No. 4 | - | 40 | 48 | - | - | 2,850 | G 5/8" | 14 | 22,911 | |
No. 5 | - | 40 | 44 | - | - | 3,170 | G 3/4" | 14 | 26,441 | |
No. 6 | - | 32 | 40 | - | - | 3,500 | G 7/8" | 14 | 30,201 | |
No. 8 | - | 32 | 36 | - | - | 4,160 | G 1" | 11 | 33,249 | |
No. 10 | - | 24 | 32 | - | - | 4,830 | G 1 1/8" | 11 | 37,897 | |
No. 12 | - | 24 | 28 | 32 | - | 5,490 | G 1 1/4" | 11 | 41,910 | |
1/16" | 60 | - | - | - | - | 1,587 | G 1 3/8" | 11 | 44,323 | |
3/32" | 48 | - | - | - | - | 2,381 | G 1 1/2" | 11 | 47,803 | |
1/8" | 40 | - | - | - | - | 3,175 | G 1 3/4" | 11 | 53,746 | |
5/32" | 32 | - | - | 3,969 | G 2" | 11 | 59,614 | |||
3/16" | 24 | - | - | - | 32 | 4,762 | G 2 1/4" | 11 | 65,710 | |
7/32" | 24 | - | - | - | 28 | 5,556 | G 2 1/2" | 11 | 75,184 | |
1/4" | 20 | 20 | 28 | 32 | 26 | 6,350 | G 2 3/4" | 11 | 81,534 | |
5/16" | 18 | 18 | 24 | 32 | 22 | 7,938 | G 3" | 11 | 87,884 | |
3/8" | 16 | 16 | 24 | 32 | 20 | 9,525 | G 3 1/4" | 11 | 93,980 | |
7/16" | 14 | 14 | 20 | 28 | 18 | 11,113 | G 3 1/2" | 11 | 100,330 | |
1/2" | 12 | 13 | 20 | 28 | 16 | 12,700 | G 3 3/4" | 11 | 106,680 | |
9/16" | 12 | 12 | 18 | 24 | 16 | 14,288 | G 4" | 11 | 113,030 | |
5/8" | 11 | 11 | 18 | 24 | 14 | 15,876 | ||||
11/16" | - | - | - | 24 | 14 | 17,463 | ||||
3/4" | 10 | 10 | 16 | 20 | 12 | 19,051 | ||||
13/16" | - | - | - | 20 | 12 | 20,638 | ||||
7/8" | 9 | 9 | 14 | 20 | 11 | 22,226 | ||||
15/16" | - | - | - | 20 | 11 | 23,813 | ||||
1" | 8 | 8 | 12 | 20 | 10 | 25,401 | ||||
11/16" | - | - | - | 18 | - | 26,988 | ||||
11/8" | 7 | 7 | 12 | 18 | 9 | 28,576 | ||||
13/16" | - | - | - | 18 | - | 30,163 | ||||
11/4" | 7 | 7 | 12 | 18 | 9 | 31,751 | ||||
15/16" | - | - | - | 18 | - | 33,338 | ||||
13/8" | 6 | 6 | 12 | 18 | 8 | 34,926 | ||||
17/16" | - | - | - | 18 | - | 36,512 | ||||
11/2" | 6 | 6 | 12 | 1 | 8 | 38,101 | ||||
15/8" | 5 | 5 | - | 18 | 8 | 41,277 | ||||
13/4" | 5 | 5 | - | 18 | 7 | 44,452 | ||||
17/8" | 4,5 | 4,5 | - | 18 | - | 47,627 | ||||
2" | 4,5 | 4,5 | - | 18 | 7 | 50,802 | ||||
2 1/4" | 4 | 4,5 | - | - | - | 57,152 | ||||
2 1/2" | 4 | 4 | - | - | - | 63,502 | ||||
2 3/4" | 3,5 | 4 | - | - | - | 69,853 | ||||
3" | 3,5 | 4 | - | - | - | 76,203 |