Nominal Size Screw Dimension (mm) 304
Inventory
B (inch) A (mm) d1 L E B D d Hezagon S Octagon S
1/4B 8A R 1/4 27 12 8 11 7 14
3/8B 10A R 3/8 29 13 10 16 8.5 17
1/2B 15A R 1/2 36 16 12 20 12 22
3/4B 20A R 3/4 38 18 12 26 16 27
1B 25A R 1 40 20 13 33 22 34
11/4B 32A R 11/4 47 22 15 40 31 43.5
11/2B 40A R 11/2 49 23 16 48 34 49.5
2B 50A R 2 56 25.5 16 60 45 61.5