Attwood SL34905 Gas Spring 20" Extended, 12" Compressed, 90 lbs.
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Attwood SL34905 marine gas spring replacement support for hatch and deck port lids—built to deliver smooth, controlled lift using a 20" extended length and 12" compressed length at 90 lbs of force.
Key Features
- Replacement Attwood gas spring for hatch/deck access applications
- 20" extended / 12" compressed lengths (as specified)
- 90 lbs rated output force (as specified)
- Environmentally focused design with bio-degradable, marine-suitable grade oil (WGK)
- Salt-spray and cycle-lifecycle performance tested to Attwood specifications
- Mounting brackets available separately
Intended Use
- Marine deck hatches and access ports
- Inspection ports and hatch lids that use gas-spring style lift supports
- Replacement gas spring support for existing marine hatch hardware (match by dimensions/force)
Product Details
- Brand: Attwood
- Model/Part number: SL34905 (as shown in title)
- Gas spring type: Marine gas spring / hatch lift support
- SKU: 23-SL34905
- Extended length: 20"
- Compressed length: 12"
- Output force: 90 lbs
- Salt-spray/lifecycle testing details included in original description: ASTM B117 salt spray and a 30,000 cycle lifecycle test
- Note: Mounting brackets are available separately (per original description)
Parts Desk Insights
Best Use Case: Use this replacement gas spring when your hatch or deck access lid no longer lifts smoothly or won’t hold position, and when the required lift support matches the specified extended/compressed lengths and 90 lb force rating.
Common Issues: Common service challenges include installing the spring with the wrong compressed/extended orientation, mismatching the force rating to lid weight, or needing the correct mounting brackets/hardware (brackets are not included with this item per the provided description).
Related Products & Accessories
Browse related Hatches/Deck Plates to complete the installation.
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.