ST6.3-14 X 55 Hex Head Self-Drilling Screw Washer Faced 316 Stainless Steel DIN7504K (1000pcs/Pkg) BOLTS provide a unique spring action

provide a unique spring action that compensates for bolt relaxation and thermal expansion

making them ideal for applications requiring vibration resistance

They maintain consistent pressure in assemblies

Their countersunk shape allows for flush mounting

Flange nuts feature a washer-like base that distributes pressure over a larger area

ST6.3-14 X 55 Hex Head Self-Drilling Screw Washer Faced 316 Stainless Steel DIN7504K (1000pcs/Pkg) BOLTS provide a unique spring actionFender 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.