Self-Tapping Screw - High-Low - Indented Hex Washer Head - #3 Head - 410 Stainless Steel - 4-24 Thread - 1/2" Long - Blunt Point - Pack of 10000

Self-tapping screws create their own threads but require a pilot hole. The hex head washer has an external hex head with a washer-style flange attached underneath the head which creates a large surface connection area. Hex heads protrude above the surface. The externally driven head allows greater torque to be applied to the screw compared to other screws that are internally driven. Indentation on the surface of the head is preferred for applications involving power-driving tools. The external hex drive is designed to be used with a ratchet. 410 stainless steel exhibits excellent corrosion and abrasion resistance.