Nominal Size Screw Dimension (mm) 304
Inventory
B (inch) A (mm) d2 A L T Hexagon S Octagon S
1/4B 8A Rc1/4 19 42.50 13.50 32
3/8B 10A Rc3/8 23 49 15 38
1/2B 15A Rc1/2 27 54.50 16 41
3/4B 20A Rc3/4 32 66.50 18 50
1B 25A Rc1 38 72.50 20 59