6-20 x 3/8 Phillips Flat Self Tapping Screw Type B Fully Threaded Black Oxide WC188 while the pan head design

while the pan head design allows for a flush finish

They have a hex washer head with an indented drive that provides a secure grip and prevents cam-out

meaning they create their own threads as they are driven in

9 Metric Flange Bolt Screw is made of high-tensile steel and features a black phosphate finish for corrosion resistance

The hex washer head provides a wide bearing surface for increased torque and the serrated full thread provides excellent holding power

6-20 x 3/8 Phillips Flat Self Tapping Screw Type B Fully Threaded Black Oxide WC188 while the pan head designThese 6 20 x 3 8 Phillips flat self tapping screws are Type B screws, meaning they have a fully threaded body. They are made of steel and have a black oxide finish. These screws are designed for use in metal applications and are self tapping, meaning they can create their own threads as they are driven into the material. They have a Phillips drive, which requires a Phillips screwdriver to install.