12-11 x 1/2 Square Pan Self Tapping Screw Type A Fully Threaded Black Oxide 5/16-24 NE The washer's large diameter provides

The washer's large diameter provides additional support and stability

This 1 1/4-7 x 12 Hex Cap Screw is made of Grade 5 steel and has a zinc coating

The 10-32 x 1 Slotted Fillister Machine Screw Fully Threaded 18-8 Stainless Steel is a type of screw that is used in a variety of applications

which means it has a flat head with a slot for a screwdriver

12-11 x 1/2 Square Pan Self Tapping Screw Type A Fully Threaded Black Oxide 5/16-24 NE The washer's large diameter providesThis black oxide self tapping screw is designed for use in metal applications. It has a square pan head with a 1 2 inch diameter and a 12 11 thread size. The screw is fully threaded, providing maximum holding power. The black oxide finish provides corrosion resistance and a clean, finished look. This screw is ideal for use in a variety of metalworking applications, including automotive, construction, and manufacturing.