Square
Square countersunk head
T-head with shoulder
Square taper
Reduced shank
Normal shank
Increased shank
Full thread
GOST 21249-2-1996
60°Square head blunt bolts-Table2
45°Square head blunt bolts-Table2
ASME/ANSI B18.2.1-1-1972
Square head bolts-Table1
ASME/ANSI B18.2.1-1-1965
GB/T 8-2021
Square head bolts