Snap Cap, Socket 1/2? Machine Screw Stud w/ Lock Nut. Great for new installation or replacement this set offers high quality Fasnap Brand stainless steel snap fasteners. Designed for salt or fresh water environment these fasteners will not corrode or rust. These snap are the real deal. No crap here. You can buy snaps for a much lower price but you will not find a better quality snap set. Guaranteed. If you don?t like them for any reason simply return any unused portion for a refund. Northwest Tarp Canvas - Mount Vernon, Washington. Trusted for more than 17 years in the Pacific Northwest and around the world.