The Attwood Stainless Steel Thru-Hull Standard Straight Barbed fitting is a durable, above-waterline marine solution designed for 3/4" hose. Built from Enhanced 316 stainless steel with a mirror-polished finish and a gasket-assisted seal, it delivers reliable performance in harsh marine environments.
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Material: Cast from Enhanced 316 stainless steel alloy for outstanding strength and lifetime corrosion resistance.
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Finish: Mirror-polished visible surfaces, then passivated for added protection.
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Seal design: Gasket-assisted seal with a channel under the flange that holds a bead of sealant for a reliable, leak-resistant seal.
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Inside-hull installation: Interior-access design with wrench flats or an end notch for gripping; one installer can tighten all connections from inside the hull.
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Barb & clamps: Barbed tail ends provide ample room to secure multiple hose clamps for a secure connection.
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Threading: Standard straight thread with full-length thread for thick hulls (Thread O.D. 1", Thread Length 2", NPSM 3/4").
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Dimensions: Hose size 3/4" I.D.; Flange Diameter 1-7/8"; Barb Length 1-1/4"; Total Length 3-3/4"; Install Hole Saw Size 1-1/8"; Max Hull Thickness 1-5/8".
Designed for reliability above the water line, this thru-hull fitting reduces potential leaks with a silicone gasket and a sealant bead channel, and its interior-access design lets a single installer tighten connections from inside the hull. The 316 stainless steel construction resists corrosion in harsh marine environments, while the mirror finish maintains a clean, professional look. With large barbed tails and clamps, it supports secure hose attachment for a leak-free service life, delivering a durable, low-maintenance solution for critical boat plumbing.
