An exterior hex screw head is also known as a hex head cap screw. The screw head is built up of a six-sided fastener. Usually there are some mixture-kind screw heads which has a slotted screw head throughout the Center on the hex head cap. Handy in many materials, panhead https://edwingiifc.rimmablog.com/28926653/the-greatest-guide-to-kinds-of-screw-heads