Machine screws, also sometimes referred to as machine bolts, usually can come in larger variations. Typically, machine screws are designed to be fastened to an existing tapped hole on a metal surface, usually in conjunction with a mating nut. Still, some machine screws have tapping ability to cut and thread a hole as they’re inserted. Thread Patch is permanently fused onto the screw thread of the fastener and increases the prevailing removal torque by acting as a wedge, allowing the screw to be locked physically or chemically in any position upon assembly.