LITTLE KNOWN FACTS ABOUT KINDS OF SCREW HEADS.

This can be the traditional, straight-line slot that a flat-blade screwdriver suits into. While not as well-liked as they was once, slotted screws remain made use of for his or her simplicity and universal accessibility.Also referred to as Robertson’s screws, square recess screw heads Possess a square center stage that helps you avoid cam-outs. T