Attwood Marine Stainless Steel Thru-Hull Fitting, 1-1/4" Inner Diameter, Straight Barbed Design

Stainless Steel Thru-Hull Standard Straight Barbed - 1-1/4" Inner Diameter

Polish your image with these beautiful, durable stainless steel fittings. Why specify plastic parts when these fittings will last the life of the boat

Rugged Stainless Construction:

• Cast from certified Enhanced 316 Stainless Steel alloy for strength and lifetime corrosion-resistance


• All visible areas are polished to a mirror finish, then passivate each part for additional protection


• Thick steel sidewalls withstand continual stress and hose flexing

Faster, Simpler Installation:

• Each Thru-Hull is available with a new silicone gasket


• 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


• The barbed tail ends provide plenty of room to hold multiple clamps

Stainless Steel Straight Thru-Hulls, Barbed

• Standard Thread model has a full-length thread for thick hulls and easy tightening

Specifications:

• Hose size: (inch) 1-1/4" inner diameter


• Flange Diameter: (inch) 2-1/4"


• Thread O.D. (outside diameter): (inch) 1-5/8"


• Thread Length: (inch) 2-1/2"


• Barb Length: (inch) 1-1/4"


• Total Length: (inch) 4-1/4"


• Install Hole Saw Size: (inch) 1-3/4"


• Thread NPSM: (inch) 1-1/4"


• Max Hull Thickness: (inch) 1-7/8"

*Stainless Steel Thru-Hull Connectors are designed for installation above the water line only

Enhance your boat's durability and appearance with the Attwood Marine Stainless Steel Thru-Hull Fitting, part number 66550-3. Crafted from certified Enhanced 316 stainless steel, this fitting offers exceptional strength and corrosion resistance, ensuring it will last the lifetime of your vessel. Its polished mirror finish not only provides a sleek look but also adds an extra layer of protection through passivation, making it ideal for marine environments. The thick steel sidewalls are designed to withstand constant stress and hose flexing, providing reliable performance over time.
Installation is quick and straightforward with features like a silicone gasket for a secure seal and a channel beneath the flange that holds sealant, reducing the risk of leaks. The wrench flats or end notches facilitate easy tightening with a single tool from inside the hull, saving time and effort during installation. The barbed tail ends are designed to accommodate multiple clamps, ensuring a secure connection with your hoses. The full-length thread on this model suits thick hulls, providing a firm and reliable fit for various vessel configurations.
Measuring 1-1/4 inches on the inner diameter, this through-hull fitting fits standard 1-1/4 inch NPSM threads with a flange diameter of 2-1/4 inches. It is suitable for hulls up to 1-7/8 inches thick, making it ideal for a range of boat applications. The total length of the fitting is approximately 4-1/4 inches, with a barb length of 1-1/4 inches, allowing for versatile and secure hose connections. This product is intended for installation above the waterline to ensure optimal performance and longevity.
Designed by Attwood Marine, this stainless steel thru-hull is a reliable choice for boat owners seeking durability, ease of installation, and a professional finish on their marine fittings.

Features:

• Rugged construction: Made from certified Enhanced 316 stainless steel with a mirror-polished finish and passivation for corrosion resistance

• Durable design: Thick sidewalls withstand continual stress and hose flexing

• Easy installation: Includes silicone gasket and a channel for sealant application, with wrench flats or end notches for tool grip

• Secure hose connection: Barbed tail ends accommodate multiple clamps for a tight fit

• Standard thread: Full-length thread suitable for thick hulls, with a flange diameter of 2-1/4 inches

• Versatile fit: Designed for hulls up to 1-7/8 inches thick and fits 1-1/4 inch inner diameter hoses

• Above waterline use only: Suitable for installation above the water surface to ensure longevity