1/4-20 x 1 Serrated Hex Flanged Washer Full Thread Screw 18-8 Stainless Steel KPUHC and the 4 1/2 refers

and the 4 1/2 refers to the length of the bolt

The 6-lobe pan head features a recessed drive that prevents cam-out and provides a clean

This 3/8-16 x 1" 6-lobe flat machine screw is fully threaded and made of zinc

* Available in a variety of sizes to fit your needs

It has a hexagonal head that allows for easy tightening and loosening with a wrench or socket

1/4-20 x 1 Serrated Hex Flanged Washer Full Thread Screw 18-8 Stainless Steel KPUHC and the 4 1/2 refersThe 1 4 20 x 1 Serrated Hex Flanged Washer Full Thread Screw 18 8 Stainless Steel is a versatile and durable fastener designed for a wide range of applications. Made from high quality 18 8 stainless steel, this screw offers excellent corrosion resistance and strength. The serrated hex flange washer head provides a secure grip and prevents the screw from loosening due to vibration or movement. The full thread design allows for maximum holding power and