4-40 x 1/4 Six Lobe Pan Head External Tooth Sems Machine Screw Fully Threaded Zinc KPFB They have a square drive

They have a square drive and a pan head

and the fully threaded design allows for a secure connection

They are also zinc-plated

eliminating the need for tapping

this screw offers strength

4-40 x 1/4 Six Lobe Pan Head External Tooth Sems Machine Screw Fully Threaded Zinc KPFB They have a square driveThe 4 40 x 1 4 Six Lobe Pan Head External Tooth Sems Machine Screw Fully Threaded Zinc is a small, versatile screw that is commonly used in a variety of applications. It is made of zinc plated steel, which gives it excellent corrosion resistance. The six lobe pan head provides a secure grip, and the external teeth help to prevent the screw from loosening. The fully threaded design allows for maximum holding power. This screw is ideal for use in wood,