3/8" Diam, Round with Flats Shank, Carbide-Tipped Rotary & Hammer Drill Bit MPN:DW5231

7/16 inch screw, grade 18-8 stainless steel split lock washer offers premium corrosion resistance and durability suitable for marine or chemical applications exposed to harsh environments. The washer's wave spring locks securely tightens against the fastener preventing loosening due to vibrations providing optimal holding power on pan-head screws ensuring stability without damage when used with hex nuts, locknuts or threaded rods for rigid assemblies within industries such as construction, automotive or machinery manufacturing. Its 18-8 material resists rust even in saltwater conditions meeting international standard SS316/ASTM A276.