Attwood SL31-20-5 Gas Spring - 20 lb Force

The Attwood SL31-20-5 Gas Spring is a marine-grade hatch lift support designed to provide dependable 20 lb lift assistance for boat hatches, engine access panels, and utility compartments. Attwood engineered this Ni-Slide series gas spring for saltwater use with biodegradable oil and corrosion-resistant composite fittings, helping you maintain smooth, reliable operation in harsh marine environments.

Key Features

• 20 lb Output Force: Provides consistent lift and controlled lowering for small to medium hatches.
• Compact Size: Extended length 7.5" and compressed length 5.25" with a 2.25" stroke for tight installations.
• Marine-Grade Construction: Ni-Slide series with corrosion-proof composite end fittings and biodegradable WGK oil.
• Durability Tested: Passes ASTM B117 salt spray and a 30,000-cycle lifecycle test for long-term reliability.
• Easy Replacement: Standard 10mm socket/eyelet end fittings; mounting brackets sold separately for quick installation.

Whether you are replacing worn hatch struts on a runabout or specifying hardware for a new build, the Attwood SL31-20-5 delivers predictable lift and low maintenance. Attwood gas springs are widely used in marine, RV, industrial and agricultural applications, offering smooth motion and resistance to corrosion. The spring’s compact profile fits confined spaces while its tested construction reduces service intervals for busy boat owners.

Packaged in a hanging blister card for retail display (mounting brackets sold separately), the product measures approximately 9 × 3 × 1.25 inches when packaged and weighs about 0.34 lb (154 g). Specifications: Model SL31-20-5, Ni-Slide series, 20 lb force, extended 7.5", compressed 5.25", stroke 2.25". Compatible with common Attwood mounting brackets and standard eyelet fittings.