Nominal Size
Screw
Dimension (mm)
304
Inventory
B (inch)
A (mm)
d1
L
Hezagon W
Octagon W
1/4B
8A
R1/4
19
14
－
●
3/8B
10A
R3/8
22
17
－
●
1/2B
15A
R1/2
24
22
－
●
3/4B
20A
R3/4
27
－
27
●
1B
25A
R1
30
－
34
●