My Account
Shopping Cart

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 over a century. Founded with a commitment to quality engineering and practical design, Attwood grew from manufacturing underwater hardware and on-deck fittings into one of the most recognized names across every segment of the marine accessories market. Today, the brand operates as part of the Navico Group by Brunswick — a global family of market-leading marine companies — yet it has never lost the focused, boater-first philosophy that built its reputation.</p><p>What sets Attwood apart is their end-to-end approach: they design, manufacture, test, and distribute their own products rather than simply resourcing components from third parties. Every product in their catalog is tested against the highest U.S. Coast Guard (USCG), American Boat and Yacht Council (ABYC), and CE standards, giving boaters and OEM boat builders alike the confidence that Attwood parts will perform when it matters most. Corrosion-resistant materials — including 304 and 316 stainless steel, chrome-plated zinc, and marine-grade synthetics — are used throughout the lineup to ensure durability in both freshwater and saltwater environments.</p><p>Attwood is also a leading OEM supplier, meaning you'll find their components pre-installed on boats straight from the factory. That pedigree speaks volumes: when boat manufacturers trust a brand to equip new vessels, that's a strong vote of confidence for the aftermarket buyer as well.</p><h3>Attwood Marine Product Categories</h3><p>Attwood's catalog spans a remarkably broad range of marine needs. On the docking and mooring side, their <a href="/7239-attwood-marine-fenders-201953">boat fenders</a> provide reliable hull protection against docks, pilings, and other vessels — an essential piece of gear for any boat owner. For on-water comfort and cockpit organization, Attwood's <a href="/7239-attwood-marine-seat-pedestal-packages-202496">seat &amp; pedestal packages</a> deliver complete seating system solutions backed by years of ergonomic engineering, while their <a href="/7239-attwood-marine-seat-clamp-mounts-202497">seat clamp mounts</a> and <a href="/7239-attwood-marine-seat-clamp-mounts-200927">mounting hardware</a> make swapping or positioning seats quick and secure. Rounding out the seating ecosystem, Attwood's broad selection of <a href="/7239-attwood-marine-seating-table-parts-accessories-202501">seating &amp; table parts and accessories</a> keeps every swivel, slide, and fitting performing at its best season after season.</p><p>Beyond seating and docking, Attwood is well known for its bilge and aerator pumps (including the iconic Sahara Mk2 and Tsunami series), navigation lighting, fuel systems, rod holders, and trailering accessories — making it a one-stop resource for outfitting or refreshing virtually any powerboat, fishing boat, or recreational vessel.</p><h3>Why Boaters Trust Attwood</h3><ul><li><strong>100+ years of marine expertise</strong> — a track record that few brands can match</li><li><strong>USCG, ABYC &amp; CE certified</strong> products built to rigorous safety and performance standards</li><li><strong>OEM-preferred supplier</strong> to leading boat manufacturers worldwide</li><li><strong>Corrosion-resistant construction</strong> engineered for saltwater and freshwater environments</li><li><strong>Full design-to-distribution control</strong> ensuring consistent quality across every product</li></ul>

Part Number

SL34-40-5
06/08/2036 3:58 AM
Sale Price

$16.57

In Stock (6)

delivery box

Usually delivered within 2 days

Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

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

I thought it was free shipping.

good conditon! next time hopefully sooner

Low price no tax free shipping count me in

Super quick ordering No problems at all. Would do it again.

Very nice people very considerate and helpful plus the price was nice

fast simple easy

I was pleasantly pleased that Autoplicity was 10% cheaper than anyplace online for the items I was looking for. Keep it up, I'll be back

very simple, very easy to order

great buying experience

Easy to enough to navigate website. Wish it was just a bit more organized when it comes to vehicle specific items.

I will definitely do more shopping with Autoplicity....great prices and quick shipments.

Easy to find parts and good prices. I hope shipping is just as fast and easy.

Price was unbeatable and the shipping was fast. Top notch reseller.

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy