Self-Piercing Sheet Metal Screw - Indented Hex Washer Head Serrated - Zinc Plated & 1,000 Hour Coat Steel - 10-16 Thread - 3/4" Long - Needle Point

Also known as needlepoint screws and zip screws, self-piercing screws feature a sharpened point that quickly pierces through thin metal and wood. The hex washer serrated head 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 serrations provide teeth-like grooves underneath the washer that bites into the surface to resist vibration. The external hex drive is designed to be used with a ratchet. Also known as sharp point and speed point, needle points are sharp points that are standard to self-piercing screws. Zinc plated steel offers good corrosion resistance in applications not exposed to excessive moisture. This finish has been salt spray tested for up to 1,000 hours of corrosion resistance.