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Boat Parts and Maintenance Supplies

Deck and plumbing fittings, thru-hull fittings, engine and electrical parts, sterndrive locks and sailing gear for boat upkeep. 109 products from $3.99 to $807.99. Unique-Bargains, Scandvik, Taylor and more.

109 products from $3.99

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Marine-grade metals: stainless, bronze and what brass cannot do

Salt water attacks ordinary metals, so material is the first filter. Stainless steel (316 is the usual marine grade) and bronze are common for hull and deck parts, while chrome-plated brass suits taps and connectors above the waterline. Below the waterline use bronze or reinforced composite thru-hull fittings, not brass, which can lose its zinc in seawater. Size a thru-hull by the hose it serves and cut the hole to the maker's stated size. The boat care and deck hardware section covers taps, valves and fittings.

Engine, electrical and anti-theft parts: match the engine and the circuit

Engine parts must match the exact engine family, so work from the make, model and year or the part number. Couplers, brushes and bearings are sized by dimensions, and a sterndrive theft lock fits one drive type only. For power systems, see boat wiring and power systems. Use finely stranded tinned copper marine wire, because plain copper corrodes in damp, salty air, and protect every positive feed with a fuse or breaker close to the battery. Starters, ignition parts and coils are specific to the engine model.

Questions about Boat Parts and Maintenance Supplies

Why not use ordinary brass below the waterline?
Brass can lose its zinc in seawater, a process called dezincification that leaves a weak, porous fitting. Below the waterline use fittings made of marine-grade bronze or reinforced composite, and keep ordinary brass for above-water use.
What does 316 stainless steel mean?
316 is a stainless alloy with added molybdenum, which resists salt-water pitting better than the common 304 grade. It is the usual choice for marine hardware, though even 316 can stain or corrode in poorly ventilated, wet locations.
How do I choose marine wire?
Choose tinned copper, finely stranded cable sized for the current and the run length, with insulation rated for the heat and moisture on board. Plain copper corrodes at the ends in damp air, which raises resistance over time.