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

The Attwood Stainless Steel Thru-Hull Short Straight Barbed fitting with 5/8" inner diameter is a critical through-hull penetration component for any serious boater or marine technician. This fitting handles the wet-exhaust discharge, raw-water cooling intake, or livewell circulation on your vessel—functions that demand absolute reliability and corrosion resistance. Whether you're running a center console, cabin cruiser, or commercial workboat, a properly installed thru-hull fitting prevents leaks, maintains watertight integrity, and keeps your systems operating efficiently mile after mile.

Built from marine-grade stainless steel, this Attwood thru-hull resists saltwater corrosion and galvanic attack far better than brass or bronze alternatives—critical when your fitting sits below the waterline or in a spray environment. The short straight configuration minimizes turbulence and pressure loss in discharge or intake lines, while the barbed design provides a positive mechanical grip on reinforced hose without requiring hose clamps alone. The 5/8" inner diameter accommodates standard marine hose sizes and integrates seamlessly with common exhaust manifolds, seawater cooling systems, and livewell plumbing on mid-sized recreational and commercial hulls.

Install this fitting wherever your boat's through-hull penetration demands a no-nonsense, corrosion-proof connection—exhaust discharge, raw-water cooling returns, and livewell drains are the most common applications. Use two-part epoxy bedding compound or marine sealant during installation to achieve a watertight seal; the barbed design secures hose from the inside while the hull-side flange sits flush with your transom or hull side. Attwood's reputation for durability means this fitting will outlast multiple seasons of hard use, making it a smart investment for anyone serious about system reliability and long-term vessel uptime.