6-20 x 1 1/2 Square Drive Flat Head Fully Threaded Self Drilling Screw Zinc & Bake CH5OF and it has a square

and it has a square head for easy installation

Whether you're working on DIY projects

and the trim head design allows the screw to be countersunk below the surface of the drywall for a clean

a flat undercut head for a flush finish

The 6-32 x 11/16 Slotted Pan Machine Screw Fully Threaded Nylon is a versatile and reliable screw that can be used in a variety of applications

6-20 x 1 1/2 Square Drive Flat Head Fully Threaded Self Drilling Screw Zinc & Bake CH5OF and it has a squareThese 6 20 x 1 1 2 square drive flat head fully threaded self drilling screws are made of zinc and bake. They are designed for use in a variety of applications, including metal to metal, metal to wood, and wood to wood. The self drilling tip eliminates the need for pre drilling, making installation quick and easy. The square drive head provides a secure grip for driving, and the flat head sits flush with the surface for a clean, finished look. These