6-Lobe
6-Lobe with pin
Round head
Countersunk head
Raised countersunk head
Cheese
Round head with collar
Low cheese head
Raised cheese
Straight-knurl
Reduced shank
Normal shank
Shoulder
Full thread
ASME/ANSI B18.3-III.2-1976
6-Lobe cap head shoulder screws-Table III-2