5/16-18 x 1 Six Lobe Pan Floor Board Screw Type F Fully Threaded Black Phosphate FSF and the square drive helps

and the square drive helps to prevent cam-out during installation

and other large wood components

The indented hex head provides a secure grip for driving and prevents stripping

These 12-11 x 5/8 Phillips pan self-tapping screws are made of 18-8 stainless steel

5/16-18 x 1 Six Lobe Pan Floor Board Screw Type F Fully Threaded Black Phosphate FSF and the square drive helpsThe 5 16 18 x 1 Six Lobe Pan Floor Board Screw Type F Fully Threaded Black Phosphate is a high quality screw designed for use in a variety of applications. It is made of steel and has a black phosphate finish for corrosion resistance. The screw has a six lobe pan head with a Phillips drive and a fully threaded shank. It is 1 inch in length and has a diameter of 5 16 inches. The screw is designed to be used in wood and is ideal for use in flooring