The TA is a type of screw drive that uses a triangle-shaped recess in the screw head. Note that the sides of the triangle are straight, which differs from TP3 fasteners. Sizes include TA14, TA18, TA20, TA23 and TA27. These screws are often found in children's toys, particularly from fast food restaurants. Jun 15, 2009 This screw drive type is very popular – and again, you find them in a very wide range of applications. Common sizes are Phillips #1, #2 and #3. heremon Phillips size is #2. See our available Phillips bits. Phillips Tamper-resistant. Not very … Fastener Type Chart Fastener Categories. Screws with a smooth shank and tapered point for use in wood. Head Styles . A countersunk head with a flat top. A countersunk head with a rounded top. Drive Types . The standard drive type for most screws . Similar to Phillips. Nut Types . A six sided nut.

heremon Types of Screw Drives. It is often known as a hex head cap screw or a hex head machine screw. This head style can be driven with a wrench or with 6 or 12 point sockets. The Hex Socket Drive has a rounded head with a hexagonal recess and is driven by a hex wrench often referred to as an Allen Wrench. There are tamper resistant versions with a pin in the recess. BOLT SCREW HEAD TYPES . SLOT PHILLIPS hereBO SQUARE hereBO PHILLIPS HEX HEAD SLOTTED HEX SIX LOBE TYPES OF BOLT AND SCREW HEADS PAN HEAD : heremended for new designs to replace round, truss and binding heads.