Attwood Marine Stainless Steel Thru-Hull Fitting 1-1/8" Inner Diameter, Straight Barbed Design

Stainless Steel Thru-Hull Standard Straight Barbed - 1-1/8" 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) 1-1/8" inner diameter


• Flange Diameter: (inch) 2-1/4"


• Thread O.D. (outside diameter): (inch) 1-3/8"


• Thread Length: (inch) 2-3/8"


• Barb Length: (inch) 1-1/4"


• Total Length: (inch) 3-7/8"


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


• Thread NPSM: (inch) 1"


• Max Hull Thickness: (inch) 1-3/4"

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

Enhance your marine vessel with the durable and corrosion-resistant Attwood Marine Stainless Steel Thru-Hull Fitting, part number 66549-3. Crafted from certified Enhanced 316 stainless steel, this fitting offers exceptional strength and long-lasting performance in harsh marine environments. Its polished mirror finish not only provides an attractive appearance but also adds an extra layer of passivation for improved corrosion protection. Designed to withstand continuous stress and hose flexing, the thick steel sidewalls ensure reliable operation over the lifespan of your boat.
Installation is faster and more straightforward with features like a silicone gasket option, a channel beneath the flange for sealant application, and wrench flats or end notches for easy gripping. The barbed tail ends allow for multiple hose clamps, ensuring a secure connection. The full-length thread model accommodates thicker hulls and simplifies tightening, making it suitable for a variety of boat constructions. This fitting is intended for above-water-line installation and is compatible with 1-1/8" inner diameter hoses.
With a flange diameter of 2-1/4 inches, a thread length of 2-3/8 inches, and a barb length of 1-1/4 inches, this thru-hull offers a reliable, professional-grade solution for marine plumbing needs. The design includes a 1-inch NPSM thread and an install hole saw size of 1-1/4 inches, fitting hulls up to 1-3/4 inches thick. Whether for new installations or replacements, this stainless steel thru-hull ensures a secure, corrosion-free connection that will last the lifetime of your boat.

Features:

• Constructed from certified Enhanced 316 stainless steel for strength and corrosion resistance

• Mirror polished finish with passivation for enhanced durability

• Thick steel sidewalls withstand stress and hose flexing

• Includes silicone gasket option for easier sealing

• Channel under flange for bead of sealant, ensuring trouble-free installation

• Wrench flats and end notches for easy tightening from inside the hull

• Barbed tail ends provide ample room for multiple clamps

• Full-length thread suitable for thick hulls and secure tightening

• Designed for above water line installation only