attwoodmarine.com WATER SYSTEMS & VENTILATION 31 68555 68576 68557 Designed for the value conscious customer, these fittings provide the look of a Stainless Steel thru-hull at a fraction of the cost Corrosion Resistance Manufactured with high quality stainless steel caps and engineered composite bodies, these thru-hulls are designed to resist degradation as a result of chemical and saltwater exposure. Consistent Look To create a uniform look, Attwood has designed its 5/8" thru 1-1/2" barbed thru-hulls with a common exterior surface. Improved Installation Always keeping the builder in mind, each fitting incorporates several different types of assembly features that allow for “single operator” installation. Caution: Stainless Steel Thru-Hull Connectors are designed for installation above the water line only. A Hose Size B Flange Dia. C Thread O.D. D Thread Length E Barb Length F Total Length Installation Hole Saw Size Max Hull Thickness OEM Part # Part # Thru-Hulls, Straight 5/8" I.D. 1-7/8" 1.27" 1.54" 1" 3.39" 1-3/8" 1.30" 68555-1 — 3/4" I.D. 1-7/8" 1.27" 1.54" 1" 3.36" 1-5/16" 1.30" 68554-1 — 1" I.D. 1-7/8" 1.27" 1.54" 1" 3.39" 1-5/16" 1.30" 68556-1 — 1-1/8" I.D. 1-7/8" 1.27" 1.54" 1.3" 3.36" 1-5/16" 1.30" 68557-1 — 1-1/2" I.D. 2-3/8" 1.5" 1.54" 1.6" 3" 1-1/2" 1.40" 68551-1 — Thru-Hulls, 90º 5/8" I.D. 1-7/8" 1.27" 1.54" 0.875" 3.48" 1-5/16" 1.30" 68576-1 — 3/4" I.D. 1-7/8" 1.27" 1.54" 1" 3.48" 1-5/16" 1.30" 68577-1 — 1" I.D. 1-7/8" 1.27" 1.54" 1.125" 3.75" 1-5/16" 1.30" 68578-1 — 1-1/8" I.D. 1-7/8" 1.27" 1.54" 1.5" 3.75" 1-5/16" 1.30" 68579-1 — 1-1/2" I.D. 2-3/8" 1.5" 1.54" 1.5" 4.45" 1-1/2" 1.30" 68581-1 — B D Dia. B F E C A D F Dia. B A E C B Straight 90° Stainless Steel Capped Composite Thru-Hulls
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