Our various head style and their names are listed below for your reference.
Flange - A nut/bolt/screw with a fixed washer. Removes the need to use seperate washers. Also applies to rivets with a larger than standard head.
Grub Screw - A screw with no head, usually with a socket drive on one end.
Countersunk Security (Pin T Drive)
Countersunk Socket (Allen Key)
Hexagon with Captive Washer
Pan Security (Pin T Drive)
Raised Countersunk Philips
Raised Countersunk Pozi
Raised Countersunk Slotted
Socket Button (Allen Key)
Socket Cap (Allen Key)