Whitecap Butt Hinge - 304 Stainless Steel - 3" x 3"

The Whitecap Butt Hinge – 304 Stainless Steel – 3" x 3" is a marine-grade deck and cabinet hinge engineered for corrosion-resistant performance in saltwater, freshwater, and outdoor environments. Designed for boat builders, RV manufacturers, and coastal property owners, this hinge serves applications where standard steel hardware would fail due to moisture and salt exposure. The 3" x 3" footprint provides substantial mounting surface area, making it ideal for access panels, hatches, lockers, and storage compartments that demand reliable operation under harsh conditions.

Manufactured from 304 stainless steel, this butt hinge resists rust, pitting, and galvanic corrosion even in high-salinity environments. The #8 FH (flat head) fastener specification ensures a smooth, flush-mounted installation that won't snag lines, canvas, or personnel. The butt hinge design—where both leaves meet in a single plane—distributes load evenly across the pivot pin and allows full 180-degree opening without binding. Its compact weight of 0.2 lbs makes it practical for applications where every ounce matters, such as offshore vessels and weight-sensitive marine systems.

This hinge benefits marine professionals, boat owners, and tactical operators who operate equipment in unforgiving environments. It performs equally well on commercial fishing vessels, military craft, sailboats, and land-based installations exposed to coastal spray. Installation requires #8 fasteners (commonly available stainless steel machine screws or self-tapping varieties), and proper pilot holes in 304 stainless material are recommended to prevent cross-threading. The Whitecap S-3421 is also suitable for truck bed covers, weatherproof storage boxes, and any outdoor application where durability and corrosion resistance are non-negotiable.