Different types of Head Style Screws:
- Flat - A countersunk head with a flat top. Abbreviated FH.
- Oval - A countersunk head with a rounded top. Abbreviated OH or OV.
- Plan - A slightly rounded head with short vertical sides. Abbreviated PN.
- Truss - An extra wide head with a rounded top.
- Round - A domed head. Abbreviated RH.
- Hex - A hexagonal Head. Abbreviated HH or HX.
- Hex Washer - A hex head with built in washer.
- Slotted Hex Washer - A hex head with built in washer and a slot.
- Socket Cap - A small cylindrical head using a socket drive.
- Button - A low-profile rounded head using a socket drive.