US
(inches) Metric
(mm)
1/8 3.18
5/32 3.97
4
3/16 4.76
5
13/64 5.16
7/32 5.56
15/64 6.05
6
1/4 6.35
17/64 6.75
7
9/32 7.14
5/16 7.94
8
11/32 8.73
9
3/8 9.53
10
11
7/16 11.11
15/32 11.91
12
1/2 12.7
13
17/32 13.49
14
9/16 14.29
15
19/32 15.08
5/8 15.88
16
21/32 16.67
17
11/16 17.46
18
19
3/4 19.05
25/32 19.84
20
13/16 20.64
21
22
7/8 22.23
23
29/32 23.02
15/16 23.81
24
31/32 24.61
25
1 25.40
26
1 1/16 26.99
27
28
1 1/8 28.58
29
30
1 3/16 30.16
31
1 1/4 31.75
32
33
1 5/16 33.34
34
1 3/8 34.93
35
36
1 7/16 36.51
38
1 1/2 38.10
39
1 9/16 39.69
40
41
1 5/8 41.28
1 11/16 42.86
1 3/4 44.45
46
1 13/16 46.04
1 7/8 47.63
1 15/16 49.21
50
2 50.80
51
2 1/8 53.96
54
2 1/4 57.15
2 3/8 60.33
2 1/2 63.5

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