Sea-Dog Steel 90 Deck Hinge Stainless. Corrosion resistant investment cast 316 stainless steel construction these hinges install with two #10 FH fasteners (not included). Concave hinges are designed to rail mount on 1 tubing. Angled hinges are used for mounting items on slanted surfaces like sloped gunwales. 180 adjustable hinge allows universal mounting at almost any angle including vertical mounting. Removable pin versions feature a spring loaded quick release pin for easy top removal. 1/4 or 5/16 pin size. Specifications for Sea-Dog Stainless Steel 90 Deck Hinge: Manufacturer: Sea-Dog Color: Silver Features of Sea-Dog Stainless Steel 90 Deck Hinge Investment Cast 316 Stainless Steel 90 Deck Hinge Base: 3/4" x 2-1/4" Pin Size: 1/4" Package Contents: Sea-Dog Stainless Steel 90 Deck Hinge Sea-Dog 270200-1: Steel 90 Deck Hinge Stainless