Description
Attwood 1" Thru-Hull Barbed Fitting - 316 SS | Boat Supply Store
Designed for above-waterline applications, this Attwood thru-hull fitting provides a robust connection for 1" inner diameter hoses in demanding marine environments. Constructed from certified Enhanced 316 Stainless Steel with a mirror-polished and passivated finish, it offers superior longevity against saltwater corrosion, unlike lesser materials. The 2-1/4" flange diameter and 1-1/8" thread length accommodate hull thicknesses up to 5/8", making it ideal for engine cooling or bilge pump discharge lines on offshore fishing vessels.
Key Features
- Superior Corrosion Resistance with certified Enhanced 316 Stainless Steel construction.
- Premium Aesthetics achieved through mirror polishing and passivation of all visible surfaces.
- Exceptional Durability with thick steel sidewalls engineered for continuous stress and hose movement.
- Reliable Sealing ensured by the inclusion of a new silicone gasket.
- Simplified Installation with integrated wrench flats for secure tightening from within the hull.
- Ample Hose Clamping Surface provided by the barbed tail end, accommodating multiple clamps.
- Space-Saving Design with a short thread for installation in tight compartments or near hull contours.
- Lifetime Protection against galvanic corrosion and pitting inherent in high-grade stainless steel.
Specifications
| Product Specifications | |
|---|---|
| Inner Diameter | 1" |
| Flange Diameter | 2-1/4" |
| Thread OD | 1-3/8" |
| Thread Length | 1-1/8" |
| Barb Length | 1" |
| Total Length | 2-1/2" |
| Hole Saw Size | 1-1/2" |
| Maximum Hull Thickness | 5/8" |
| Installation Location | Above Waterline Only |
| Thread Type | NPSM 1" |
Who This Is For
Boat owners and marine professionals who demand enduring performance and aesthetic appeal for above-waterline plumbing. This fitting is engineered for those prioritizing longevity and ease of installation in saltwater environments.
How It Compares
| Feature | Attwood 1" Thru-Hull Barbed Fitting - 316 SS | Competitor |
|---|---|---|
| Material | Enhanced 316 Stainless Steel | Bronze, Chrome-plated Brass |
| Hose Size (Inner Diameter) | 1" | 1-1/2", 1" |
| Thread Size | 1" NPSM | 1-1/2" NPSM, 1" NPSM |
| Finish | Mirror Polish & Passivated | Polished, Chrome-plated |
| Max Hull Thickness | 5/8" | 5/8", 3/4" |
| Installation Location | Above Waterline Only | Above Waterline Only, Above Waterline Only |
Common Concerns Answered
Why is this fitting more expensive than plastic alternatives?
The higher cost reflects the superior durability and longevity of certified Enhanced 316 Stainless Steel, which provides exceptional corrosion resistance and strength, outlasting plastic and lower-grade metals in harsh marine conditions.
Can I use this thru-hull fitting below the waterline?
No, this specific Attwood thru-hull fitting is designed and rated for above-waterline installations only. Using it below the waterline is a safety hazard and will void any warranty.
What makes Attwood's stainless steel different?
Attwood utilizes certified Enhanced 316 Stainless Steel, which offers superior resistance to pitting and crevice corrosion compared to standard 316 stainless steel, ensuring a longer service life in saltwater.
Frequently Asked Questions
What is the maximum hull thickness this Attwood thru-hull fitting can accommodate?
The Attwood Stainless Steel Thru-Hull Short Straight Barbed fitting is designed for a maximum hull thickness of 5/8".
What size hole saw is required for installation?
A 1-1/2" hole saw is required to drill the opening for this fitting.
What is the thread size of this Attwood thru-hull fitting?
This Attwood thru-hull fitting features a 1" NPSM thread.
Can this fitting be used for below-waterline applications?
No, this fitting is strictly rated and intended for above-waterline installations only.
What type of stainless steel alloy does Attwood use for this fitting?
Attwood uses certified Enhanced 316 Stainless Steel alloy for this thru-hull fitting, ensuring exceptional corrosion resistance and strength.
