#7 x 7/8 Phillips Flat Self Tapping Screw Type A Fully Threaded Zinc Bake -10000/PK

6X3/8 Phillips Full Contour Truss Self Tapping Screw Type B Fully Threaded Black Oxide. Type B thread for molded or through holes in thin metal, non-ferrous castings. 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.

1/4-20X1 Phillips Flat Thread Cutting Screw Type F Fully Threaded Zinc Bake. 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. Flat head screws are used when protrusion of the fastener above the mating surface is unacceptable. Typically 100 degree flat or for fastening softer materials, 82 degrees flat.

6X3/8 Phillips Pan Self Tapping Screw Type A B Fully Threaded Zinc Bake. Type AB thread for use in the thinner sheet metal like used in appliances. Pan head screws are a common style that can substituted in most applications for round, truss or binding heads.

8X5/8 Phillips Flat Undercut Full Thread Self Drilling Screw Zinc Bake. Self drilling screws have point to cut through material and eleiminate the need to drill a pilot hole. Flat undercut heads are used when a flat head is desired on shorter length screws.

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.