Self-Drilling Screw - Hex Washer Head - 410 Stainless Steel - 12-24 Thread - 3" Long - #5 Drill Point - Pack of 250

Self-drilling screws are efficient because they eliminate the need for a pilot hole, tap their own threads, and fasten materials in a single operation. 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. The external hex drive is designed to be used with a ratchet. 410 stainless steel exhibits excellent corrosion and abrasion resistance.