Attwood Marine ST35-50-5 SpringLift Stainless Steel Gas Spring 50 lb 12" Extended 8.5" Compressed

The Attwood Marine ST35-50-5 is a SpringLift Series stainless steel gas spring built for demanding marine environments where corrosion resistance and long-term reliability are non-negotiable. With a 50 lb force rating, 12" extended length, and 8.5" compressed length, this gas strut delivers smooth, controlled support for hatches, lids, storage compartments, deck panels, and access covers on boats and marine vessels.

Key Specifications:

• Extended Length: 12.04 inches
• Compressed Length: 8.46 inches
• Stroke: 3.58 inches
• Force Rating: 50 lb standard output force
• Rod Diameter: 8mm (5/16")
• Cylinder Diameter: 3/4"
• End Fittings: 10mm composite ball socket
• Construction: #316 stainless steel pressure tube and rod

Features & Benefits:

• Pressure tube and rod manufactured from super-tough #316 stainless steel alloy for maximum corrosion resistance
• All exposed components are stainless steel or marine-grade composite
• High-strength, corrosion-proof composite end fittings included
• Filled with biodegradable, water-safe oil — the marine industry's most environmentally friendly gas spring formulation
• Passes ASTM B117 salt spray testing and Attwood's rigorous 30,000-cycle lifecycle test
• Ideal for livewells, line lockers, deck hatches, engine compartments, and other moisture-prone areas
• Compatible with saltwater applications

The ST35-50-5 is part of Attwood's popular aftermarket SpringLift stainless steel line, which is partnered with Stabilus®, the world's leading supplier of gas springs. This gas strut is a direct-fit replacement for a wide range of OEM applications and is an upgrade over standard steel springs wherever corrosion resistance and appearance matter.