6-20 x 5/16 Phillips Pan Self Tapping Screw Type AB Fully Threaded Black Oxide NF8C The nut has a castellated

The nut has a castellated design

The split lock washer creates a spring-like tension between the nut and the surface

The bolt's 5/8-11 thread size and 8 1/2-inch length provide a secure and versatile connection

8-18 x 3/4 Slotted Indented Hex Washer Self Drilling Screw Full Thread Zinc & Bake are designed for use in metal applications

This 1/4-20 x 1 3/4" slotted indented hex washer head machine screw is fully threaded and made of zinc-plated steel

6-20 x 5/16 Phillips Pan Self Tapping Screw Type AB Fully Threaded Black Oxide NF8C The nut has a castellatedThese 6 20 x 5 16 Phillips Pan Self Tapping Screw Type AB Fully Threaded Black Oxide are designed for use in a variety of applications. They are made of steel and have a black oxide finish for corrosion resistance. The pan head provides a low profile, while the Phillips drive allows for easy installation. These screws are self tapping, which means they can create their own threads in metal or plastic. They are fully threaded for maximum holding power.