Sea-Dog 321422 Gas Filled Lift Spring
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You have 30 days to request a return. All sale items are final sale.
Sea-Dog 321422 Gas Filled Lift Spring is a gas-filled hatch lift spring engineered for controlled opening/closing performance and built with durable marine-ready materials.
Key Features
- Gas-filled lift spring designed for hatch and access applications
- Unique multi-lobe seal for improved service life and performance
- Hard chromium plated shafts for corrosion-resistant durability
- Bronze bushings and polymer end fittings for reliable operation
- Heavy gauge steel body with pressure damping for controlled extension/compression speed
Intended Use
- Marine deck hatches/access ports
- RV and utility lids/doors
- Tool box and truck cap hatches
- General lift-assist applications where a gas spring is used (install in pairs as typically recommended for gas-lift systems)
Product Details
- Part/Model: Sea-Dog 321422 (variant shown as 321422-1)
- SKU: 354-3214221
- Lift spring type: Gas Filled Lift Spring
- Cylinder size: 15 mm
- Lift/extension range: 7 in to 10 in (extension measurement)
- Compressed measurement: 7 in
- Extended measurement: 10 in
- Stroke: 3 in
- Load/force rating: 20 lb (extended force)
- Suggested use key (application key): 1, 2, 3
- Construction (per manufacturer description): heavy gauge steel body; hard chromium plated shafts; bronze bushings; polymer end fittings
- Includes: 1 lift spring (sold each)
- Weight (from variant data): 116 g
Parts Desk Insights
Best Use Case: Best suited for upgrading or replacing gas lift springs on marine deck hatches/access ports—especially when you want consistent, damped lift action and long service life from the seal.
Common Issues: Common replacement drivers include loss of lift strength over time and uneven/different lift speeds between hatch sides. When installing, ensure you match springs by rating/length range and follow the hatch hardware layout so the damping and end fitting orientation work as intended.
Related Products & Accessories
- Sea-Dog Gas Filled Lift Spring (matching pair/application) - Pairing is commonly used for gas-lift hatch applications; browse the Sea-Dog gas spring lineup to match your required lift range/force.
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.