col : whitworth size (in) | core diameter (in) | threads per inch | pitch (in) | tapping drill size row 1 : 1/16 | 0.0411 | 60.0 | 0.0167 | number drill 56 (1.2 mm) row 2 : 3/32 | 0.0672 | 48.0 | 0.0208 | number drill 49 (1.85 mm) row 3 : 1/8 | 0.093 | 40.0 | 0.025 | number drill 39 (2.55 mm) row 4 : 5/32 | 0.1162 | 32.0 | 0.0313 | number drill 30 (3.2 mm) row 5 : 3/16 | 0.1341 | 24.0 | 0.0417 | number drill 26 (3.7 mm) row 6 : 7/32 | 0.1654 | 24.0 | 0.0417 | number drill 16 (4.5 mm) row 7 : 1/4 | 0.186 | 20.0 | 0.05 | number drill 9 (5.1 mm) row 8 : 5/16 | 0.2414 | 18.0 | 0.0556 | letter drill f (6.5 mm) row 9 : 3/8 | 0.295 | 16.0 | 0.0625 | 5/16 in (7.94 mm) row 10 : 7/16 | 0.346 | 14.0 | 0.0714 | letter drill u (9.3 mm) row 11 : 1/2 | 0.3933 | 12.0 | 0.0833 | letter drill z (10.5 mm) row 12 : 9/16 | 0.4558 | 12.0 | 0.0833 | 12.1 mm (0.4764 in) row 13 : 5/8 | 0.5086 | 11.0 | 0.0909 | 13.5 mm (0.5315 in) row 14 : 11/16 | 0.5711 | 11.0 | 0.0909 | 15 mm (0.5906 in) row 15 : 3/4 | 0.6219 | 10.0 | 0.1 | 16.27 mm (0.6406 in) row 16 : 13/16 | 0.6845 | 10.0 | 0.1 | 18 mm (0.7087 in) row 17 : 7/8 | 0.7327 | 9.0 | 0.1111 | 19.25 mm (0.7579 in) row 18 : 15/16 | 0.7953 | 9.0 | 0.1111 | 20.75 mm (0.8169 in) row 19 : 1 | 0.8399 | 8.0 | 0.125 | 22 mm (0.8661 in) row 20 : 1 1/8 | 0.942 | 7.0 | 0.1429 | nan row 21 : 1 1/4 | 1.067 | 7.0 | 0.1429 | nan row 22 : 1 1/2 | 1.2866 | 6.0 | 0.1667 | nan row 23 : 1 3/4 | 1.4939 | 5.0 | 0.2 | nan row 24 : 2 | 1.7154 | 4.5 | 0.2222 | nan row 25 : 2 1/2 | 2.18 | 4.0 | 0.25 | nan
what are the sizes of threads per inch?
60, 48, 40, 32, 24, 24, 20, 18, 16, 14, 12, 12, 11, 11, 10, 10, 9, 9, 8, 7, 7, 6, 5, 4.5, 4
Whitworth size (in) Core diameter (in) Threads per inch Pitch (in) Tapping drill size
what are the sizes of threads per inch?
1/16 0.0411 60.0 0.0167 Number Drill 56 (1.2 mm)
3/32 0.0672 48.0 0.0208 Number Drill 49 (1.85 mm)
1/8 0.093 40.0 0.025 Number Drill 39 (2.55 mm)
5/32 0.1162 32.0 0.0313 Number Drill 30 (3.2 mm)
3/16 0.1341 24.0 0.0417 Number Drill 26 (3.7 mm)
7/32 0.1654 24.0 0.0417 Number Drill 16 (4.5 mm)
1/4 0.186 20.0 0.05 Number Drill 9 (5.1 mm)
5/16 0.2414 18.0 0.0556 Letter Drill F (6.5 mm)
3/8 0.295 16.0 0.0625 5/16 in (7.94 mm)
7/16 0.346 14.0 0.0714 Letter Drill U (9.3 mm)
1/2 0.3933 12.0 0.0833 Letter Drill Z (10.5 mm)
9/16 0.4558 12.0 0.0833 12.1 mm (0.4764 in)
5/8 0.5086 11.0 0.0909 13.5 mm (0.5315 in)
11/16 0.5711 11.0 0.0909 15 mm (0.5906 in)
3/4 0.6219 10.0 0.1 16.27 mm (0.6406 in)
13/16 0.6845 10.0 0.1 18 mm (0.7087 in)
7/8 0.7327 9.0 0.1111 19.25 mm (0.7579 in)
15/16 0.7953 9.0 0.1111 20.75 mm (0.8169 in)
1 0.8399 8.0 0.125 22 mm (0.8661 in)
1 1/8 0.942 7.0 0.1429 nan
1 1/4 1.067 7.0 0.1429 nan
1 1/2 1.2866 6.0 0.1667 nan
1 3/4 1.4939 5.0 0.2 nan
2 1.7154 4.5 0.2222 nan
2 1/2 2.18 4.0 0.25 nan
60 48 40 32 24 24 20 18 16 14 12 12 11 11 10 10 9 9 8 7 7 6 5 4.5 4
what are the sizes of threads per inch? || 