Round head
Countersunk head
Raised countersunk head
Cheese
Round head with collar
Low cheese head
Raised cheese
ASME/ANSI B18.3-III.2-2012
6-Lobe round head cap screws-Table III-2
ASME/ANSI B18.6.3-19-2013
6-Lobe pan head screws-Table 19
ASME/ANSI B18.6.3-25-2013
6-Lobe truss head screws-Table 25
ASME/ANSI B18.3-III.2-2017
6-Lobe round head screws-Table III-2
ASME/ANSI B18.3-III.2-1976
6-Lobe round head screws-Table III-2