6-20 x 3/8 Phillips Flat Self Tapping Screw Type B Fully Threaded Black Oxide WC188 The hex washer head provides

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

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

Its 1 1/8" inner diameter fits snugly around standard bolts and screws

which helps to prevent the nut from loosening

The heavy hex shape provides increased strength and durability

6-20 x 3/8 Phillips Flat Self Tapping Screw Type B Fully Threaded Black Oxide WC188 The hex washer head providesThese 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.