5/16-9X1 5/8 A/F.428-.437 Head Hgt.200-.230 Unslot Indent Hexwash Lag Screw Full Thread Zinc 900 pcs

12-24X3/4 Phillips Flt Underct Full Thread Self Drill Scr Machine Sc Thread 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.

10-24X1/2 Unslotted Indented Hex Washer Thread Cutting Screw Type 23 Fully Threaded Zinc. Thread-Cutting Type-23 screws provide excellent chip clearance with minimum tightening torques. Steel: Used in cast iron and zinc, aluminum die castings, and plastics. Stainless: Material into which the screw is to cut threads should have a lower hardness. Indented hex washer head offers advantages of hex head, plus greater protection to mating surface.

3/8-16X1 Unslotted Indented Hex Washer Thread Cutting Screw Type F Fully Threaded Zinc. 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. Indented hex washer head offers advantages of hex head, plus greater protection to mating surface.

10-24X2 1/2 Phil Wafer Head #3 Point Self Drill Screw Machine Screw Thd Full Thread Zinc Bake. Self drilling screws have point to cut through material and eleiminate the need to drill a pilot hole. Wafer heads provide necessary bearing surface and flush fit in wood and softer materials.

12X1/2 Unslotted Indented Hex Washer High Low Screw Fully Threaded 18-8 Stainless Steel. High-Low thread for use in plastic, nylon, wood or other low-density materials. Thread design reduces driving torques, enhances resistance to thread stripping, improves pullout strength and lessens the risk of cracking the work piece. Indented hex washer head offers advantages of hex head, plus greater protection to mating surface.