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 B18.6.3-19-2013
6-Lobe pan head screws-Table 19
ASME/ANSI B18.6.3-25-2013
6-Lobe truss head screws-Table 25