WATER SYSTEMS 29
attwoodmarine.com
Stainless Steel Capped Composite Thru-Hulls
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.
B
C
B
C
A
E
Dia. B
D
E
Dia. B
F
A
D
Straight
90°
F
68555
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"
68555-1 68554-1 68556-1 68557-1 68551-1 68576-1 68577-1 68578-1 68579-1 68581-1
1.27" 1.27" 1.27" 1.27"
1.54" 1.54" 1.54" 1.54" 1.54" 1.54" 1.54" 1.54" 1.54" 1.54"
1" 1" 1"
3.39" 3.36" 3.39" 3.36"
1-3/8"
1.30" 1.30" 1.30" 1.30" 1.40" 1.30" 1.30" 1.30" 1.30" 1.30"
— — — — — — — — — —
3/4" I.D.
1-7/8" 1-7/8"
1-5/16" 1-5/16" 1-5/16"
1" I.D.
1-1/8" I.D. 1-7/8" 1-1/2" I.D. 2-3/8" Thru-Hulls, 90º 5/8" I.D.
1.3" 1.6"
1.5"
3"
1-1/2"
1-7/8" 1-7/8" 1-7/8"
1.27" 1.27" 1.27" 1.27"
0.875" 3.48"
1-5/16" 1-5/16" 1-5/16" 1-5/16"
68557
3/4" I.D.
1"
3.48"
1" I.D.
1.125" 3.75"
1-1/8" I.D. 1-7/8" 1-1/2" I.D. 2-3/8"
1.5" 1.5"
3.75" 4.45"
1.5"
1-1/2"
68576
CA WARNING: Handling recreational marine vessel parts can expose you to chemicals such as phthalates and lead, which can cause cancer and reproductive harm. To minimize exposure, service the vessel outdoors or in a well-ventilated area, wear gloves, and wash your hands. For more information see www.P65Warnings.ca.gov/marine-vessel-parts.
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