6-13 x 1 Square Phil Drive Flat w/Nibs Deep Thread Wood Screw Full Thrd 17point Zinc 10-24-2B this screw features a self-piercing

this screw features a self-piercing tip that allows it to penetrate thin metal without the need for pre-drilling

The screws are 4-20 x 7/32 inches in size

These 6-18 x 1 Phillips flat self-tapping screws are Type A screws with a fully threaded design

which means it is designed to be used with screws that have a #3 thread size

6-13 x 1 Square Phil Drive Flat w/Nibs Deep Thread Wood Screw Full Thrd 17point Zinc 10-24-2B this screw features a self-piercingThese 6 13 x 1 Square Phil Drive Flat w Nibs Deep Thread Wood Screw Full Thrd 17point Zinc are designed for use in a variety of woodworking applications. They feature a square Phil drive, which provides a secure grip for driving, and a deep thread that ensures a strong hold in wood. The flat head sits flush with the surface of the wood, making them ideal for use in applications where a clean, finished look is desired. The nibs on the screw help to