Attwood Marine Short Straight Barbed Thru-Hull Fitting, 316 Stainless Steel
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Overview
The Attwood Marine Stainless Steel Thru-Hull Short Straight Barbed is a short-length stainless steel thru-hull fitting with a straight barbed hose tail for above-waterline plumbing connections on boats. It is made for installations where a hose needs to pass cleanly through the hull or transom, such as cockpit drains, baitwell drains, livewell plumbing, or other discharge points that sit above the waterline.
The fitting is cast from enhanced 316 stainless steel, with visible surfaces polished to a mirror finish and passivated for added protection in the marine environment. The short body helps in tighter spaces where there is limited room behind the hull, while the barbed end gives the hose a secure gripping surface for clamp installation.
Key features
- Enhanced 316 stainless steel construction helps resist corrosion in wet, salty, and washdown-prone areas.
- Short straight body suits tight behind-panel or transom spaces where a longer thru-hull would be harder to fit.
- Barbed hose tail supports a secure hose connection with marine hose clamps.
- Sealant channel under the flange helps hold bedding compound during installation.
- Silicone gasket adds a clean sealing surface between the flange and hull.
- Wrench flats and an end notch help the installer tighten the fitting from inside the hull.
Variants
This Attwood Marine thru-hull range varies by hose inner diameter, covering 5/8 inch, 3/4 inch, 1 inch, 1-1/8 inch, 1-1/4 inch, and 1-1/2 inch hose sizes. The matching size should be selected based on the hose already installed on the boat or the hose size specified for the drain, livewell, baitwell, or plumbing system being built.
Installation and fit
This fitting is intended for above-waterline use. Before drilling or replacing an existing thru-hull, confirm the hose inner diameter, hull thickness, available clearance behind the mounting surface, and access for tightening the nut and clamps. The polished flange sits on the outside of the hull, while the threaded body and barb pass through to the inside for connection to the hose.
Use a marine sealant suitable for the hull material and follow normal thru-hull bedding practices. The sealant channel under the flange helps keep sealant where it is needed, and the hose should be clamped securely after it is fully seated on the barb.
Use on board
This fitting is a practical match for boat owners replacing plastic thru-hulls with stainless steel hardware, or for builders and refit projects where the visible fitting needs a clean polished finish. It works well in exposed areas such as the transom, cockpit sides, or topsides where the fitting may see spray, sun, and regular washdowns.
Shipping
We ship worldwide from the United States. Rates are calculated at checkout based on destination and package weight. Some items include free shipping, which will show automatically. Not every product is eligible for international shipping; checkout will confirm eligibility. We do not ship to PO Boxes except through USPS, and not all packages qualify.
Processing and dispatch
Most orders are verified, packed, and handed to the carrier within 1 to 2 business days. Some products may need extra handling time or ship directly from the manufacturer. For certain international orders, inventory transfers between warehouses may add time. If any delay is expected, we will let you know the dispatch date.
Delivery and tracking
Deliveries are handled by trusted carriers such as USPS, UPS, FedEx, and DHL. Estimated arrival times appear at checkout and depend on your location and the service you choose. These are estimates and can be affected by customs or carrier disruptions. A shipping confirmation with a tracking link is emailed when your order ships, and tracking may take up to 24 hours to update. You can also view tracking in your account.
Duties, taxes, and support
International customers are responsible for any customs duties, taxes, and fees charged by the destination country. If these charges are refused and a shipment returns to us, the carrier’s return cost and any re-entry customs fees will be deducted from the refund. If your order is late or you need help, contact cs@qualityboatparts.com and we will assist you.
Quality Boat Parts is a reseller. Many items include a manufacturer’s warranty, and all warranty service is handled directly by the manufacturer. We do not manage or administer warranty claims on behalf of customers.
Warranty terms, coverage, and duration are set by each manufacturer. Issues involving defects, repairs, or replacements must be addressed with the manufacturer’s support team. When available, the warranty period is listed on the product page. If it is not shown, contact us or the manufacturer for details before purchasing.
To start a claim, the customer must contact the manufacturer and follow their process. Keep your proof of purchase and original packaging, and register the product if the manufacturer requires it, as these are often needed for warranty service.
We are happy to help you find the right contact or documentation, but we cannot decide outcomes or intervene in claim resolutions. For guidance, email cs@qualityboatparts.com.
