Attwood Stainless Steel Thru-Hull Standard Straight Barbed - 1-1/2" Inner Diameter is a rugged, corrosion-resistant thru-hull fitting designed for reliable, above-waterline use on boats. Cast from certified Enhanced 316 stainless steel and polished for a mirror-like finish, it delivers strength, long-lasting corrosion resistance, and a clean, professional look.
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Material & Finish: Cast from certified Enhanced 316 stainless steel, polished to a mirror finish and passivated for extra protection.
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Durability & Corrosion Resistance: Built to withstand harsh marine conditions with lifetime corrosion resistance.
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Sealing Design: Includes a new silicone gasket on every thru-hull and a sealant channel under the flange for a reliable, leak-free seal.
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Installation Features: Thick sidewalls resist continual stress and hose flex; wrench flats or end notch provide gripping surfaces for single-installer tightening from inside the hull.
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Barbed Tail & Clamps: Barbed tail ends accommodate multiple clamps for secure hose connections.
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Thread & Fit: Standard NPSM thread with full-length thread for thick hulls; Hose size 1-1/2" ID; Thread O.D. 1-7/8"; Thread Length 2-1/2"; Barb Length 1-1/4".
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Flange & Hole Size: Flange Diameter 3"; Install Hole Saw Size 2"; Max Hull Thickness 1-7/8".
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Compatibility: Installations above the water line only.
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Brand & Part: Attwood Marine, Part No 66551-3; UPC 022697665515.
With its corrosion-resistant construction, precise sizing, and practical installation features, this thru-hull provides a reliable, leak-resistant connection for above-waterline plumbing on boats. The built-in seal channel and gasket reduce assembly steps, while the wrench-accessible surfaces enable quick, single-technician installation from inside the hull, helping you complete installations efficiently and maintain a clean, professional appearance on your vessel.
