A countersunk head with a flat top. Abreviated FH
A countersunk head with a rounded top. Abbreviated OH or OV
A slightly rounded head with short vrtical sides. Abbreviated PN
An extra wide head with a rounded top.
A domed head.
A hexagonal head.
Abbreviated HH or HX
A hex head with built in washer.
A hex head with built in
washer and a slot.
A small cylindrical head using a socket drive.
A low profile rounded head using a socket drive.