316 Stainless Steel Mooring Spring - Heavy-Duty Shock Absorbing Dock Line

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Sale price$16.98
Size: 6*300
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Advanced Marine Shock Absorption

Protect your vessel's structural integrity with the AirowMarine 316 Stainless Steel Mooring Spring. Engineered for high-stress marine environments, this heavy-duty shock absorber significantly reduces the kinetic energy transferred to your boat's cleats and dock lines during heavy surges.

  • AISI 316 Marine Grade: Superior corrosion resistance for saltwater environments compared to 304 stainless steel.
  • Silent Operation: Integrated internal polymer mufflers eliminate the metal-on-metal squeaking common in traditional springs.
  • Precision Engineering: CNC-formed coils provide consistent compression and rebound cycles for long-term durability.
  • Universal Compatibility: Designed for use with nylon, polyester, or polypropylene dock lines.
Comprehensive specification chart mapping mooring spring model sizes to recommended boat tonnage ratings from 10 to 40+ tons.

Frequently Asked Questions

Will this mooring spring create annoying squeaking noises at night?
No. Our design features internal high-density polymer mufflers that prevent metal-on-metal contact, ensuring completely silent operation and a peaceful night at the marina.
Is 316 stainless steel really necessary for saltwater use?
Yes. Unlike 304 stainless or galvanized steel, our 316 marine-grade alloy contains molybdenum, providing essential resistance to chloride pitting and rust in harsh saltwater environments.
How do I choose the correct size for my boat?
Sizing is based on vessel displacement. For boats 10-16 tons, we recommend the 7x400mm variant. Larger vessels over 40 tons should utilize the 12x470mm heavy-duty model for optimal shock absorption.

Engineering Specs

REV: 2025.Q4 // TECH-STANDARD
Material_Grade
AISI 316 Stainless
Surface_Finish
Electropolished Mirror Finish
UV_Resistance
UV-Stabilized Elastomer Inserts
Corrosion_Rating
Salt Spray Tested 316 Stainless Steel
Compatibility
Yacht, Pontoon, Center Console, Bass Boat
Hull_Integration
Fiberglass, Aluminum, Wood
Standard_Ref
Universal Marine Snubber

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