Hex washer heads are practically the same as hex head screws. The only variation is that a washer is featured on the hex washer head. We offer both equally metal and plastic screws. The steel tubes and steel screws are provided separately. You have the choice in between a screw https://rowanmoppn.vblogetin.com/34943397/not-known-details-about-types-of-screw-heads-list