NOT KNOWN FACTUAL STATEMENTS ABOUT TYPES OF SCREW HEADS

A slotted screw head was the first form of screw heads to be developed. It was The most cost effective to produce and was clear-cut. often known as pig nose or twin gap, this screw head has two round holes which might be opposite each other and resemble a pig’s nose. This is a security-style screw to stop tampering. you will require a Specific s