6-20 x 1 Square Drive Pan Self Drilling Screw Full Thread Zinc NHHG They have a hex washer

They have a hex washer head with an indented drive for a secure hold

this lag screw is perfect for framing

Made of alloy steel and heat-treated for superior strength

These screws are made of zinc and bake for added durability and corrosion resistance

The bolt is designed to be used with a nut and washer to fasten two pieces of metal together

6-20 x 1 Square Drive Pan Self Drilling Screw Full Thread Zinc NHHG They have a hex washerThese 6 20 x 1" Square Drive Pan Self Drilling Screws are designed for a variety of applications. They are made of zinc plated steel for corrosion resistance and feature a square drive for easy installation. The self drilling tip eliminates the need for pre drilling, making them ideal for use in metal, plastic, and wood. These screws are full thread, providing maximum holding power. With a length of 1 inch and a diameter of 6 20, they are suitable for