Secure yet removable, this small but critical part helps keep your production running smoothly. General purpose threaded fastener is designed for insertion in pretapped holes or for use with nuts. Thick, hexagonal head with a washer face under the head provides an ample bearing surface for tightening with a wrench. Finding the right screw for your project is essential. Minimum thread length is calculated using the screw’s length. The formula is dia. X 2 + 1/4”.