Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 5/8" Inner Diameter

The Attwood Stainless Steel Thru-Hull Standard Straight Barbed with 5/8" inner diameter is a marine-grade through-hull fitting engineered for anglers and boaters who demand reliability where freshwater or saltwater meets hull. Whether you're running a cooling system, livewell intake, or raw water application, this fitting handles the job without compromise. Serious boaters know that plastic deteriorates under UV and thermal cycling—stainless steel fittings outlast the boat itself.

Constructed from premium stainless steel, this through-hull fitting resists corrosion in saltwater environments and maintains structural integrity across decades of use. The straight barbed design creates a positive mechanical lock when installed into hose, preventing slippage and leaks under pressure—critical for systems operating at cruising speeds or idle. The 5/8" inner diameter accommodates standard marine hose sizes commonly found in engine cooling circuits and livewell systems, making it a direct replacement or upgrade for original equipment on most mid-sized recreational vessels.

Installation is straightforward for anyone with basic through-hull experience—simply position the fitting from inside the hull, apply marine sealant or gasket material, and tighten with a wrench or hose clamp from the exterior. This fitting works seamlessly with standard marine hose and clamp assemblies found in livewell overflows, engine water intake systems, and bilge discharge lines. Anglers operating in saltwater regions or those maintaining older vessels will appreciate the superior longevity and corrosion resistance compared to brass or plastic alternatives—a single upgrade that pays dividends year after year on the water.