Marine Thru-Hull Outlet Fitting - 316 Stainless Steel Mirror Polish (1/2"-1.25")

In stock
Sale price€6,95
Size: 1/2"
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Superior Marine Plumbing Engineering

Upgrade your vessel's drainage system with the AirowMarine 316 Stainless Steel Thru-Hull Outlet Fitting. Engineered for extreme maritime conditions, this fitting is cast from premium AISI 316 stainless steel, offering unparalleled resistance to pitting and crevice corrosion in high-salinity environments.

Technical Precision

  • Jewelry-Grade Finish: The electropolished mirror surface not only provides a high-end aesthetic but actively resists marine growth and grime buildup.
  • Watertight Integrity: Machined with exacting tolerances and supplied with a heavy-duty locking nut to ensure a fail-safe, leak-proof seal for your bilge and plumbing lines.
  • Versatile Application: Suitable for above or below waterline installation on fiberglass, aluminum, or composite hulls.

Whether you are performing a critical repair or a custom boat build, AirowMarine hardware provides the structural reliability required for the open sea.

Vertical infographic detailing AirowMarine brand values, key features including low maintenance, and material specifications for boat plumbing.

Frequently Asked Questions

Will this fitting rust in high-salinity saltwater environments?
No. This fitting is manufactured from AISI 316 Stainless Steel, which contains molybdenum. This specific alloy is designed to prevent pitting and corrosion even in the harshest saltwater conditions, unlike lower-grade 304 stainless.
Is the installation hardware included with the thru-hull?
Yes, each fitting comes with a heavy-duty, precision-machined locking nut to ensure a secure, watertight seal against the hull during installation.
Does the mirror finish serve a purpose beyond looks?
Absolutely. The 'Jewelry-Grade' electropolished finish creates a molecularly smooth surface that significantly reduces the ability of marine growth, algae, and grime to adhere to the fitting, making maintenance much easier.

Engineering Specs

REV: 2025.Q4 // TECH-STANDARD
Material_Grade
AISI 316 Stainless Steel
Surface_Finish
Jewelry-Grade Mirror Polish
UV_Resistance
High Reflectivity Electropolished Surface
Corrosion_Rating
316 Stainless Steel Salt Spray Tested
Compatibility
Yachts, Center Consoles, Bass Boats, Pontoons
Hull_Integration
Fiberglass, Aluminum, Composite, Wood
Standard_Ref
Universal Marine NPSM Standard

ESTABLISHED 2017

AirowMarine

Professional Marine Hardware for a Safer Voyage.

Design engineers and marine consultants reviewing technical blueprints and a stainless steel porthole window assembly in an office overlooking a container port.

Our Roots

Hong Kong Based, 8 Years of Expertise

The story of AirowMarine began eight years ago. Headquartered in Hong Kong, we have been dedicated to the global operation and brand building of marine accessories. These eight years of experience have taught us that on the unpredictable sea, every single component carries the trust and safety of the boat owner.

B2B marine hardware production: A massive mirror-polished 316 stainless steel boat anchor being hoisted for quality verification in AirowMarine’s industrial workshop in mainland China.

Supply Chain

Invested Factories in Mainland China

To ensure our products withstand extreme environments, we are more than just a bridge for trade. AirowMarine has invested in its own manufacturing facilities in Mainland China. Leveraging the region's mature and efficient industrial supply chain, we are deeply involved in the entire process—from raw material selection and precision machining to final assembly. We avoid exaggerated claims; instead, through professional logistics and rigorous quality control, we ensure every product delivered to you meets high nautical-grade standards.

Technical quality control inspection showing a Mitutoyo digital caliper measuring a polished marine fitting at 12.45mm precision.

Reliability

Strict QC & Global Logistics

As a provider of marine accessories, our business is intimately connected to the water. We believe that protecting the ocean is not just a slogan; it must be reflected in every detail of our business. Currently, AirowMarine is continuously optimizing our packaging solutions: we maximize the reduction of single-use plastics in our packaging and shipping processes, using recyclable paper-based cushioning materials whenever possible. Our products are built to power your voyage, while our packaging is designed to protect the purity of the blue sea.

Close-up of a 316 stainless steel circular louvered deck vent in eco-friendly honeycomb paper packaging with AirowMarine shipping label.

Our Mission

Protecting the Blue, Plastic-Free

We are aware that there is always room for improvement, but we have never stopped in our pursuit of excellence and environmental responsibility. AirowMarine is committed to providing you with durable, reliable, and eco-conscious marine accessories.

Expert Guidance

Technical help in 24 hours

International Delivery

Secure & Tracked Shipping

Custom Solutions

Tailored parts for your boat

Factory Direct

Invested supply, best value

Proven Quality

Tested for nautical safety