HWH ( HHWH ) ( High ) Hex Washer Head : Washer face provides a bearing surface for the driving sockets . |
PPH ( PPFH ) Phillips Pan ( Framing ) Head : Conventional head for general applications and provides low profile fastening . |
PFH Phillips Flat Head : Used primarily in wood to countersink and seat flush without splintering the wood . |
PWH Phillips Wafer Head : Large head provides the bearing surface necessary to seat flush in soft materials . |
||||||
PBH Phillips Bugle Head : Used primarily for fastening drywall , plywood or insulation board to steel studs . |
PTH ( MPTH ) ( Modified ) Phillips Truss Head : Large head and low profile provides surface area needed to attach wire lath to metal stud . |
PPCH Phillips Pancake Conventional Head : Head for general applications and provides low and flat profile . |
PFTH Phillips Flat Truss Head : Lowest profile head available for attaching metal to metal . |
||||||
PFHUC Pancake Framing Head Undercut : Used for countersinking where a full head taper would cause stand-off of the screw . |
SHWH Slotted Hex Washer Head : Hex washer head with slot in center to provide additional drive connection . |
TPCH Torx Pancake Head : Pancake head with a star drive to prevent strip during installation and provide a decorative drive finish . |
L |
MF MT |
L |
MF MT |