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| UNC - Unified Coarse Thread. The old definition NC is comparable with the metric thread. The new term UNC is comparable with the ISO metric thread. NC and UNC threads are interchangeable, in an analogous manner like the metric and the ISO metric thread. |
N 1 - 64 UNC |
0,073 |
1,854 |
1,50 |
64 |
0,397 |
N 2 - 56 UNC |
0,086 |
2,184 |
1,80 |
56 |
0,453 |
N 3 - 48 UNC |
0,099 |
2,515 |
2,10 |
48 |
0,529 |
N 4 - 40 UNC |
0,112 |
2,845 |
2,35 |
40 |
0,635 |
N 5 - 40 UNC |
0,125 |
3,175 |
2,65 |
40 |
0,635 |
N 6 - 32 UNC |
0,138 |
3,505 |
2,85 |
32 |
0,794 |
N 8 - 32 UNC |
0,164 |
4,166 |
3,50 |
32 |
0,794 |
N 10 - 24 UNC |
0,190 |
4,826 |
4,00 |
24 |
1,058 |
N 12 - 24 UNC |
0,216 |
5,486 |
4,65 |
24 |
1,058 |
1/4" - 20 UNC |
0,250 |
6,350 |
5,35 |
20 |
1,270 |
5/16" - 18 UNC |
0,313 |
7,938 |
6,80 |
18 |
1,411 |
3/8" - 16 UNC |
0,375 |
9,525 |
8,25 |
16 |
1,587 |
7/16" - 14 UNC |
0,438 |
11,112 |
9,65 |
14 |
1,814 |
1/2" - 13 UNC |
0,500 |
12,700 |
11,15 |
13 |
1,954 |
9/16" - 12 UNC |
0,563 |
14,288 |
12,60 |
12 |
2,117 |
5/8" - 11 UNC |
0,625 |
15,875 |
14,05 |
11 |
2,309 |
3/4" - 10 UNC |
0,750 |
19,050 |
17,00 |
10 |
2,540 |
7/8" - 9 UNC |
0,875 |
22,225 |
20,00 |
9 |
2,822 |
1" - 8 UNC |
1,000 |
25,400 |
22,25 |
8 |
3,175 |
1 1/8" - 7 UNC |
1,125 |
28,575 |
25,65 |
7 |
3,628 |
1 1/4" - 7 UNC |
1,250 |
31,750 |
28,85 |
7 |
3,628 |
1 3/8" - 6 UNC |
1,375 |
34,925 |
31,55 |
6 |
4,233 |
1 1/2" - 6 UNC |
1,500 |
38,100 |
34,70 |
6 |
4,233 |
1 3/4" - 5 UNC |
1,750 |
44,450 |
40,40 |
5 |
5,080 |
2" - 4 1/2 UNC |
2,000 |
50,800 |
46,30 |
4,5 |
5,644 |
2 1/4" - 4 1/2 UNC |
2,250 |
57,150 |
52,65 |
4,5 |
5,644 |
2 1/2" - 4 UNC |
2,500 |
63,500 |
58,50 |
4 |
6,350 |
2 3/4" - 4 UNC |
2,750 |
69,850 |
64,75 |
4 |
6,350 |
3" - 4 UNC |
3,000 |
76,200 |
71,10 |
4 |
6,350 |
3 1/4" - 4 UNC |
3,250 |
82,550 |
77,45 |
4 |
6,350 |
3 1/2" - 4 UNC |
3,500 |
88,900 |
83,80 |
4 |
6,350 |
3 3/4" - 4 UNC |
3,750 |
95,250 |
90,15 |
4 |
6,350 |
4" - 4 UNC |
4,000 |
101,600 |
96,50 |
4 |
6,350 |
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