Stainless Steel Straight Thru-Hull Fittings, Barbed

Polish your image with these beautiful, durable stainless steel fittings. Each Thru-Hull and Scupper Valve is available with a new silicone gasket and are backed by Attwood's trusted Lifetime Warranty! Why specify plastic parts when these fittings will last the life of the boat?

Rugged Stainless Construction

• Cast from certified enhanced #316 Stainless Steel allow for strength and lifetime corrosion-resistance
• We polish all visible areas to a mirror finish, then each part through a passivation for additional protection
• Thick steel sidewalls withstand continual stress and hose flexing

Solid Silicone Gasket

• Gasket is dimensionally stable--will not deteriorate or shrink over time
• Excellent resistance to UV & weather-aging
• Watertight, fool-proof, one-piece seal
• Eliminates the need to form and apply sealant or caulk
• No more chemicals, solvent-soaked rags, or cleanup
• More than pays for itself in saved labor and cleanup time
• Guaranteed good looks because the perfect fit and concealment is built in the gasket

Faster, Simpler Installation

• A channel under the flange holds a bead of sealant, making it easier to apply a trouble-free seal
• All models have wrench flats or an end notch to hold as a gripping surface. One installer can tighten all connections from inside the hull
• Barbed tail ends provide plenty of room to hold multiple clamps

Caution: Thru-Hull connectors are designed for installation above the water line only.

Lifetime Warranty

• Hose Size 1-1/8" I.D.
• Flage Dia. 2-1/4"
• Thread O.D. 1-3/8"
• Thresd Length 1-1/4"
• Barb Length 1"
• Total Length 2-1/2"
• Install Hole Saw Size 1-1/2"
• Thread NP SM 1"
• Max Hull Thick. (Short 5/8") (Standard 1-3/4")
• Bulk without gasket 66549-1
• Bulk with gasket 66549G1