5 ESSENTIAL ELEMENTS FOR WHAT IS A LEAD SCREW

An exterior hex screw head is often called a hex head cap screw. The screw head is made up of a 6-sided fastener. There are numerous mixture-type screw heads by using a slotted screw head with the Center in the hex head cap.Often called pig nose or twin gap, this screw head has two round holes that happen to be opposite each other and resemble a pi