5-20 x 1/2 Phillips Flat Self Tapping Screw Type B Fully Threaded Zinc 22NCUP The hex washer head provides

The hex washer head provides a large bearing surface for increased torque and prevents the screw from over-tightening

This 1/4-20 x 3 ribbed neck carriage bolt is made of steel and has a partial thread

while the nylon insert provides a secure hold

The modified truss head provides a low profile and increased driving torque

The combination drive allows for use with either a Phillips or slotted screwdriver

5-20 x 1/2 Phillips Flat Self Tapping Screw Type B Fully Threaded Zinc 22NCUP The hex washer head providesThese 5 20 x 1 2 Phillips flat self tapping screws are Type B fully threaded screws made of zinc. They are designed for use in a variety of applications, including metal, wood, and plastic. The screws have a sharp point that helps them to penetrate the material easily, and the self tapping threads create a strong hold. The Phillips drive head allows for easy installation and removal. These screws are zinc plated for corrosion resistance.