Machine Screw - Slotted Pan Head - Black Zinc Steel - 4-40 Thread - 1/2" Long - Pack of 500

Machine screws are generally used to fasten metal parts together in various types of machinery, automotive, and construction applications. Machine screws are typically used with a pre-tapped hole or with a nut. The pan head features a disc with chamfered outer edge and short cylindrical sides that resembles a frying pan. Pan heads protrude above the fastening surface. The slotted drive has a straight-line notch grooved into the surface the head and is designed to be used with flat-headed screwdrivers. Black zinc-plated steel offers good corrosion resistance in applications not exposed to excessive moisture and provides anti-galling properties.