Truss Head

4-40X3/8 Phillips Pan Thread Cutting Screw Type F Fully Threaded 18 8 Stainless Steel. Thread-Cutting Type-F threaded screws are used in heavy gauge sheet metal, aluminum, zinc and lead die castings, cast iron, brass and plastic. In stainless steel, material into which the screw is to cut threads should have a lower hardness by 10-20 Rockwell hardness. Pan head screws are a common style that can substituted in most applications for round, truss or binding heads.

8X1 1/4 Phillips Bugle Head Full Thread Self Drilling Drywall Screw Black Phosphate. Concrete screws cut their own threads when used in concrete, block or brick. Carbide bits are recommended for use in masonry. Bugle head screws are commonly used for drywall because it distributes bearing stress over a wider area than a flat head.

Phillips Pan Head Self Tapping Screws provide a common style that can be substituted in most applications for round, truss or binding heads. Fasteners feature Type A thread for self starting in thin metal or resin-filled plywood and for long lasting durability.

Phillips Flat Head Self Tapping/Sheet Metal Screws provide large threads for high versatility, and are designed for use when protrusion of the fastener above the mating surface is unacceptable for long lasting durability.

8X3/4 Phillips Modified Truss Head Full Thread Self Drilling Screw Black Phos. Self drilling screws have point to cut through material and eleiminate the need to drill a pilot hole. Truss head screws are weaker than pan or round heads but preferred in applications where minimal clearance exists above the head. Modified truss heads offer low clearance and an extra large bearing surface. Commonly used to attach metal lathe to metal studs.