The shaft is the prolonged steel rod from the screw that potential customers from The top to a degree. This really is threaded absolutely or partly which has a ridge to screw into resources or make pilot holes. You will also find types of screws with flat bottoms that are supposed to be tapped into holes in lieu of screwed. You can use a Robertson

Cheese Head. A cheese head has cylindrical sides by using a flat disc top rated (much like a wheel of cheese) in addition to a flat bearing floor. Binding screw heads are non-countersunk, which suggests that these heads don’t feature an angle and so are Evidently obvious about the task’s surface area, sitting earlier mentioned it. for that rea