Attwood Stainless Steel Gas Spring, 12 Inch x 8.6 Inch, 50 lb Force, Boat Hatch Support Strut

This Attwood gas spring is a self-supporting strut built from stainless steel to hold boat hatches, deck lids, and storage compartment covers open without the need for separate latches or props. Rated at 50 pounds of force, it is sized for medium-weight hatch lids and extends to 12 inches overall with an 8.6 inch compressed length, making it a straightforward fit for hatch openings sized to match that travel range. The stainless steel housing and rod resist corrosion from saltwater spray and humid marine environments, so the strut continues to extend and retract smoothly season after season rather than seizing up the way an unprotected steel spring can. Installation is simple: the gas spring mounts between the hatch and the surrounding frame or coaming, using the same basic ball-stud or bracket mounting common to boat hatch struts, and once in place it lifts and holds the hatch at its open position automatically. It is a good match for anyone replacing a worn-out, weak, or leaking hatch strut, or for anyone building a new hatch, deck box, or storage lid that needs a reliable prop. At just under 0.4 pounds, it adds minimal weight to the hatch assembly while providing consistent, repeatable support.

Specifications

• Brand: Attwood
• Manufacturer Part Number: ST35-50-5
• Product Type: Gas spring / hatch support strut
• Material: Stainless steel
• Force Rating: 50 pounds
• Extended Length: 12 inches
• Compressed Length: 8.6 inches
• Weight: 0.3854 pounds
• UPC: 022697355058
• Category: Boat hatches and hatch adjusters

Frequently Asked Questions

What is the force rating of the Attwood ST35-50-5 gas spring? It is rated at 50 pounds of force, which is the amount of support the Attwood ST35-50-5 provides to hold a hatch or lid in the open position.

What material is this gas spring made from? The Attwood ST35-50-5 is made from stainless steel, chosen for its resistance to corrosion in saltwater and humid marine environments.

What are the extended and compressed lengths of this strut? The ST35-50-5 extends to 12 inches overall and has a compressed length of 8.6 inches.

Will this gas spring work for a heavy deck hatch? At a 50 pound force rating, the Attwood ST35-50-5 is sized for medium-weight hatches and lids rather than very heavy deck hatches; check the weight of your hatch against this rating before ordering.

How much does the ST35-50-5 weigh? This Attwood gas spring weighs 0.3854 pounds.

Is this gas spring suitable for saltwater use? Yes, the stainless steel construction of the Attwood ST35-50-5 is designed to hold up against saltwater spray and marine humidity without corroding.

Can this gas spring replace a weak or worn-out hatch strut? Yes, the ST35-50-5 is commonly used to replace a hatch gas spring that has lost pressure or seized, restoring the hatch's ability to stay open on its own.

What is the UPC for this part? The Attwood ST35-50-5 stainless steel gas spring carries UPC 022697355058.

Does the hatch stay open on its own with this strut installed? Yes, the ST35-50-5 is a self-supporting gas spring, meaning it holds the hatch open at full extension without a separate prop or latch.

What type of products is this gas spring used on? The Attwood ST35-50-5 is used on boat hatches, deck lids, and storage compartment covers that need a strut to hold them open.