5/16-18 x 3/8 Serrated Hex Flanged Washer Full Thread Screw Case Hard Zinc ABPR It has both external and

It has both external and internal teeth

This 1/4-20 x 1 1/8 Hex Cap Screw is made of steel and has a Grade 8 strength rating

these self-drilling screws eliminate the need for pre-drilling

while the black zinc coating offers excellent corrosion resistance

while the plain finish ensures a clean and professional appearance

5/16-18 x 3/8 Serrated Hex Flanged Washer Full Thread Screw Case Hard Zinc ABPR It has both external andThe 5 16 18 x 3 8 Serrated Hex Flanged Washer Full Thread Screw Case Hard Zinc is a versatile and durable fastener designed for a wide range of applications. It features a serrated hex flange head that provides a secure grip and prevents the screw from loosening due to vibration or movement. The full thread design allows for maximum holding power, while the case hardened zinc plating provides excellent corrosion resistance. This screw is ideal for use