ST4.2-18 X 19 Hex Head Self-Drilling Screw Washer Faced 304 Stainless Steel DIN7504K (5000pcs/Pkg) Package:5000 Fender washers have a larger

Fender washers have a larger outer diameter to improve load distribution on thin surfaces

Keps lock nuts feature an integrated washer with small teeth that grip the surface to prevent loosening

Nylon insert lock nuts are designed with a nylon insert that grips the threads of the bolt

while the serrated edges increase friction

making them ideal for securing bolts and nuts in dynamic applications

ST4.2-18 X 19 Hex Head Self-Drilling Screw Washer Faced 304 Stainless Steel DIN7504K (5000pcs/Pkg) Package:5000 Fender washers have a largerFender 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.