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Attwood Marine SL34-40-5 Gas Spring 20" Extended 12" Compressed 40 lbs

Manufacturer

Attwood Marine

<h3>About Attwood Marine</h3><p><strong>Attwood Marine</strong> has been a cornerstone of the boating world for well over a century. <a href="/7239-attwood-marine">Founded in 1893</a>, the company began by manufacturing precision underwater hardware and on-deck fittings — rudders, struts, cleats, and lights — and quickly earned a reputation for fine engineering and enduring quality. After World War I, the brand's craftsmanship was so well regarded that legendary boatbuilder Chris-Craft turned to Attwood for brass fittings on their iconic pleasure boats.</p><p>Today, Attwood operates as part of the Navico Group by Brunswick, a global family of industry-leading marine companies, yet it has never lost the boater-first focus that built its name. What distinguishes Attwood from many competitors is their end-to-end philosophy: they design, manufacture, test, and distribute their own products rather than simply sourcing components from third parties. Every item in the Attwood catalog is rigorously tested to meet or exceed U.S. Coast Guard (USCG), American Boat and Yacht Council (ABYC), and CE standards — giving boaters and OEM manufacturers alike the confidence to rely on Attwood gear season after season.</p><h3>A Complete Marine Accessories Ecosystem</h3><p>Attwood's catalog spans an impressively broad range of marine needs. On the comfort and ergonomics side, their <a href="/7239-attwood-marine-seat-pedestal-packages-200926">Seat &amp; Pedestal Packages</a> deliver complete, ready-to-install seating system solutions backed by decades of engineering refinement. For boaters who prefer to build or customize their setup, Attwood's Fixed Mount Pedestals provide a sturdy, reliable foundation engineered for lasting stability on the water.</p><p>When it comes to protecting your hull at the dock, Attwood's <a href="/7239-attwood-marine-fenders-200396">Fenders</a> offer dependable, marine-grade cushioning against docks, pilings, and other vessels — an often-overlooked but essential piece of gear for every boat owner. Getting on and off the boat safely is equally important, and Attwood's <a href="/200179-boarding-ladders-attwood-marine-7239">Boarding Ladders</a> are designed with heavy-duty construction, rated hardware, and user-friendly features to make every entry and exit as secure as possible.</p><p>Beyond these categories, Attwood is also widely recognized for its bilge and aerator pumps, navigation lighting, fuel systems, rod holders, and trailering accessories — making the brand a true one-stop resource for outfitting or refreshing virtually any powerboat, fishing boat, or recreational vessel.</p><h3>Why Boaters Choose Attwood</h3><ul style="list-style:disc"><li><strong>100+ Years of Proven Experience</strong> — A heritage of quality engineering stretching back to 1893.</li><li><strong>Multi-Standard Compliance</strong> — Products tested to USCG, ABYC, and CE standards for safety and performance.</li><li><strong>OEM-Trusted</strong> — A leading supplier to major boat manufacturers across a wide range of product categories.</li><li><strong>Corrosion-Resistant Materials</strong> — Extensive use of 304 and 316 stainless steel, chrome-plated zinc, and marine-grade synthetics built for harsh saltwater environments.</li><li><strong>In-House Engineering</strong> — Advanced prototyping, simulation, and real-world testing ensure reliability before any product reaches the water.</li></ul>

Part Number

SL34-40-5
09/12/2036 10:11 AM
Sale Price

$16.57

1 left at this price

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Usually delivered within 2 days

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Product Details

The Attwood Marine SL34-40-5 is a high-quality replacement gas spring engineered for reliable performance in marine environments. This gas spring extends to 20 inches and compresses to 12 inches, providing 40 pounds of force for smooth, controlled lifting and lowering of hatches, seats, and compartment lids.

Key Features:

  • 20-inch extended length, 12-inch compressed length
  • 40-pound force rating for consistent support
  • Environmentally friendly bio-degradable oil (WGK rating) that poses no hazard to water
  • Passes rigorous ASTM B117 salt spray testing for superior corrosion resistance
  • Validated through 30,000 cycle lifecycle testing for long-term durability
  • Designed specifically for marine applications

This gas spring is one of the most environmentally responsible options in the marine industry, combining eco-friendly construction with proven performance. Ideal for replacing worn or failed gas springs on boats, pontoons, and other watercraft, the SL34-40-5 delivers reliable operation in harsh saltwater conditions.

Products specifications

Approximate Stroke

8"

Compressed Measurement

12"

Cylinder Size

18mm

Description

8 x 18 - 8MM ROD x 18MM CYLINDER

Diameter: Rod

8mm

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