Attwood SL31205 Gas Spring 7.5" Extended, 5.25" Compressed, 20 lbs.
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Attwood SL31205 gas spring (Ni-Slide series) provides smooth lift support for marine hatches and access ports, delivering 20 lbs of force with a 7.5" extended length and 5.25" compressed length.
Key Features
- 20 lbs output force for hatch and access port lift support
- 7.5" extended length / 5.25" compressed length (2.25" stroke)
- 10mm socket end fitting for compatibility with matching hatch hardware
- Built as a popular replacement gas spring for marine deck hatches and access ports
- Salt-spray and corrosion-cycle performance testing designed for marine environments
- Bio-degradable, no-hazard-to-water grade oil (WGK) construction
Intended Use
- Marine deck hatches
- Marine access ports
- Lift-support applications using 10mm socket end fitting gas springs
Product Details
- • Brand/Line: Attwood (Ni-Slide series)
- • Model/Part Number: SL31-20-5 (listed as SL31205 in catalog/normalized forms)
- • SKU: 23-SL31205
- • Extended length: 7.5"
- • Compressed length: 5.25"
- • Stroke: 2.25"
- • Output force: 20 lbs
- • End fitting type: 10mm Socket
- • Rod/Cylinder size (as listed): 8mm rod x 18mm cylinder
- • Application note: Mounting brackets are available separately (brackets sold separately from the spring).
Parts Desk Insights
Best Use Case: A direct replacement option when your existing hatch lift support has weakened and you need the same extended/compressed lengths and 20 lb force rating for consistent hatch motion.
Common Issues: Common service mistakes include measuring the wrong end positions (extended vs. compressed), pairing the spring with a mismatched end fitting/lever geometry, or reusing worn mounting hardware—check the hatch bracket locations and matching mating parts before installing.
Related Products & Accessories
- Attwood Mounting Brackets (Sold Separately) - Brackets required for installation are available separately—pair to the correct end fitting and hatch/port bracket layout.
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.