Attwood SL33405 Gas Spring 15" Extended, 9.5" Compressed, 40 lbs.
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You have 30 days to request a return. All sale items are final sale.
Attwood SL33405 gas spring is a direct replacement style lift support for marine deck hatch applications, engineered for smooth assistance with a rated 40 lbs of output force. Match the spring’s extended/compressed lengths to restore proper hatch lift performance.
Key Features
- Replacement-style marine gas spring (hatch lift support)
- 15 in extended / 9.5 in compressed lengths for the specified SL33405 configuration
- 40 lbs output force for controlled lift assistance
- Built with bio-degradable, no hazard to water (WGK) grade oil
- Salt-spray and durability testing includes ASTM B117 plus Attwood salt spray and a 30,000 cycle lifecycle test
Intended Use
- Marine deck hatch lift supports
- Deck plates and access port hatch lift assistance (match dimensions and force)
Product Details
- Brand/Series: Attwood
- Model/SKU: SL33405
- Variant SKU: 23-SL33405
- Extended length: 15 in
- Compressed length: 9.5 in
- Rated force: 40 lbs
- Testing/Materials (per provided product description): bio-degradable WGK grade oil; ASTM B117; Attwood salt spray; 30,000 cycle lifecycle test
- Note: Mounting brackets are available separately.
Parts Desk Insights
Best Use Case: Use this spring when your existing hatch lift support no longer provides smooth travel or correct lift force—especially when the hatch now sits low, feels weak, or struggles to raise to the expected position. Always verify you’re matching the extended length, compressed length, and force rating shown for SL33405.
Common Issues: Common replacement mistakes are mismatching the compressed/extended lengths or selecting the wrong force rating, which can cause slow or incomplete opening, overly aggressive lift, or poor alignment at the hatch. Also confirm any mating end hardware is compatible with your hatch’s bracket setup (mounting brackets are sold separately for this item).
Related Products & Accessories
- Mounting Brackets (sold separately) - Search the marine deck hatches & access ports category for Attwood mounting brackets compatible with your hatch setup.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.