Attwood Marine Ni-Slide Series Hatch Support Gas Spring, Steel, 20 in Extended, 12 in Compressed, 8 in Stroke, 10 mm Blade End

Overview

The Attwood Marine Ni-Slide Series Gas Spring is a steel hatch support for boat lids, deck hatches, storage compartments, engine covers, and other hinged panels that need controlled lift assistance. This configuration uses a 20.00 in extended length, 12.00 in compressed length, and 8.00 in stroke, giving installers a clear replacement size to match against the existing support before ordering.

The series uses a 10 mm blade end fitting and an 8 mm rod with an 18 mm cylinder. Force options in this product family range from 20 lb to 120 lb, so the same length and mounting style can be matched to lighter or heavier hatches without changing the basic fit format.

Key features

• 20.00 in extended length, 12.00 in compressed length, and 8.00 in stroke for straightforward replacement matching.
• Steel gas spring construction for hatch, lid, and compartment support on boats and similar marine applications.
• 10 mm blade end fitting for installations that use blade-style upper and lower attachment points.
• 8 mm rod and 18 mm cylinder format used across the SL3 Ni-Slide configuration.
• Available output forces cover 20 lb, 30 lb, 40 lb, 50 lb, 60 lb, 70 lb, 90 lb, 110 lb, and 120 lb.

Variants

This Ni-Slide gas spring range varies by output force. Each listed variant keeps the same 20.00 in extended length, 12.00 in compressed length, 8.00 in stroke, steel construction, and 10 mm blade end fitting, with the force rating changing to suit the weight and leverage of the hatch or lid.

Lower force ratings are used where the panel is lighter or has favorable hinge geometry, while higher force ratings support heavier lids, engine covers, or larger access panels. The correct force depends on hatch weight, mounting angle, distance from the hinge, and whether one or two supports are used.

Installation and fit

Match the extended length, compressed length, stroke, and end fitting style before replacing an existing hatch support. The 10 mm blade end fitting should align with compatible blade-style brackets, and the support should be mounted so the hatch can open fully without forcing the spring past its travel.

For paired installations, both supports should normally be replaced together and matched by force rating. This helps the hatch lift evenly and reduces twisting loads on the hinges and mounting brackets.

Use on board

This gas spring is a practical fit for boaters replacing worn hatch supports on cockpit lockers, fish box lids, deck storage, battery compartments, or engine access covers. It is especially useful where a lid needs to stay open during inspection, loading, cleaning, or service work.

Because force selection affects how the hatch opens and closes, the best replacement is the one that matches the original rating or the vessel builder's specified support force. When changing force, confirm the hatch movement by hand before relying on the support in regular use.