Sea-Dog Nylon Deck Hinge - Black. Concave Hinges are designed to rail mount on 7/8 tubing. Angled Hinges are used for mounting items on slanted surfaces like sloped gunwales. 3/16 pin size. Constructed of UV stabilized injection molded nylon. Installs with two #10 FH fasteners (not included). Available in black or white. Features of Sea-Dog Nylon Deck Hinge Injection Molded Nylon Installs with two #10 FH fasteners (not included) Pin Size: 3/16" Quick and easy installation Package Contents: Sea-Dog Nylon Deck Hinge Sea-Dog 273200-1: Nylon Deck Hinge - Black