Gas Spring Guide

Attwood Gas Springs

Complete Guide to the Ni-Slide Series & Stainless Steel Series

Attwood Marine offers premium gas springs designed for boat hatches, lids, and other marine applications. This guide dives deep into the two major product lines: the Ni-Slide Series and the Stainless Steel Series. You’ll also find part numbers, specifications, and help choosing the right gas spring.

Attwood Marine Qualifies for Free Shipping Attwood Gas Spring 36" x 21" C 140#13mm #SL29-140-1

Ni-Slide Series

The Ni-Slide (SL) Series features carbon steel shafts with a nitrogen case-hardened finish and a corrosion-resistant black powder coating. They are cost-effective and suitable for limited exposure to saltwater.
Part Number Extended Length Compressed Length Stroke Output Force (lbs)
SL1205 10" 7" 3" 20
SL2405 15" 9.5" 5.5" 40
SL30405 10" 7" 3" 40
SL31405 7.5" 5.25" 2.25" 40
SL34205 20" 12" 8" 20
SL34305 20" 12" 8" 30
SL34605 20" 12" 8" 60
SL34905 20" 12" 8" 90
SL36205 17.2" 10.2" 7" 20
SL36905 17.2" 10.2" 7" 90
SL33605 15" 9.5" 5.5" 60

Attwood Marine Qualifies for Free Shipping Attwood SS Gas Spring 8mm Ext 17.2" Comp 10.2" #ST36-60-5

Stainless Steel Series

The ST Series is made with stainless steel shafts and shells, offering maximum corrosion resistance for continuous marine or saltwater exposure. These come with corrosion-proof composite ends and a clip-less design.

Part Number Extended Length Compressed Length Stroke Output Force (lbs)
ST30205 10" 7" 3" 20
ST30405 10" 7" 3" 40
ST31205 7.5" 5.25" 2.25" 20
ST32305 10.5" 7.5" 3" 30
ST33205 15" 9.5" 5.5" 20
ST33405 15" 9.5" 5.5" 40
ST33605 15" 9.5" 5.5" 60
ST34205 20" 12" 8" 20
ST34305 20" 12" 8" 30
ST34405 20" 12" 8" 40
ST34805 20" 12" 8" 80
ST34905 20" 12" 8" 90
ST341205 20" 12" 8" 120
ST35405 12.04" 8.46" 3.58" 40
ST35505 12.04" 8.46" 3.58" 50
ST36405 17.2" 10.2" 7" 40
ST36705 17.2" 10.2" 7" 70
ST36905 17.2" 10.2" 7" 90

How to Choose the Right Gas Spring

  • Weight: Know the weight of the lid or hatch to choose proper output force.
  • Length: Measure extended and compressed distances between mounting points.
  • Environment: Use Stainless Steel in saltwater exposure; Ni-Slide for general applications.