ST4.2-18 X 32 Hex Head Self-Drilling Screw Washer Faced 410 Stainless Steel DIN7504K (4000pcs/Pkg) Weight-Pound:26.4 These general-use flat washers are

These general-use flat washers are placed under the head of a bolt or nut to create a smooth bearing surface and distribute the load over a wider area

while the nylon insert grips the threads of the bolt

They distribute load over a larger area

External tooth lock washers feature serrated edges that grip both the fastener and the surface

SAE flat washers are standard flat washers designed to provide a smooth bearing surface and distribute load under bolts

ST4.2-18 X 32 Hex Head Self-Drilling Screw Washer Faced 410 Stainless Steel DIN7504K (4000pcs/Pkg) Weight-Pound:26.4 These general-use flat washers areFender washers have a larger outer diameter to improve load distribution on thin surfaces, such as sheet metal. This design helps prevent damage and enhances the stability of fastened connections.