types of screw head drives - An Overview
Frequently puzzled with a hex bolt, However they’re not the exact same. A hex bolt works by using a nut, although a hex head cap screw is mounted in the tapped hole. Uncomplicated change the head to tighten. They’re available with or without a slotted generate.The Lox recess screw head is a design and style of 4 overlapping squares that are rec