4-40 x 3/8 Phil Flat Taptite Alternative Thread Rolling Scrw Fully Thread Black Oxide & Wax 1 1/2-6 N1610 It has a hex head

It has a hex head for easy driving and a 3 1/4-inch length

1/4-20 x 1/2 Serrated Hex Flanged Washer Full Thread Screw

These 6-20 x 3/4 Phillips oval self-drilling screws are designed for quick and easy installation into metal

These 2 x 5/16 Round Head Type U Drive Screws are made of zinc-plated steel for durability and corrosion resistance

The split lock washer integrated into the design prevents loosening due to vibration or movement

4-40 x 3/8 Phil Flat Taptite Alternative Thread Rolling Scrw Fully Thread Black Oxide & Wax 1 1/2-6 N1610 It has a hex headThe 4 40 x 3 8 Phil Flat Taptite Alternative Thread Rolling Screw is a fully threaded screw with a black oxide and wax finish. It is designed for use in metal applications and has a Phillips flat head. The screw is self tapping, which means it can create its own threads in the material it is being inserted into. The black oxide finish provides corrosion resistance, while the wax finish helps to reduce friction during installation. The screw is 3 8