GSNI-4688-40
40 lb force with 5.6 in stroke and 15 mm tube; sold as an individual support.
JR Products GSNI Gas Springs: 13.98–18-Inch Size Guide
JR Products' mid-length GSNI springs include a 13.98-inch model, a 15-inch family in three force ratings, plus specialty 17- and 18-inch supports. They use plastic ball-socket ends, but their compressed lengths, strokes and tube diameters differ. This chart helps you avoid a near-size substitute.
Length, stroke and force comparison
These six models do not share one common body size or stroke. Their 6 mm rods have either an 8 mm or a 15 mm tube depending on the exact manufacturer number.
| Exact MPN | Extended | Compressed | Stroke | Force | Rod / tube |
|---|---|---|---|---|---|
| GSNI-4688-40 | 13.98 in | 8.4 in | 5.6 in | 40 lb | 6/15 mm |
| GSNI-5150-20 | 15 in | 8.91 in | 6.09 in | 20 lb | 6/15 mm |
| GSNI-5150-40 | 15 in | 8.91 in | 6.09 in | 40 lb | 6/15 mm |
| GSNI-5150-60 | 15 in | 8.91 in | 6.09 in | 60 lb | 6/15 mm |
| GSNI-4032-28 | 17 in | 10 in | 7 in | 28 lb | 6/8 mm |
| GSNI-4033-30 | 18 in | 11.5 in | 6.5 in | 30 lb | 6/8 mm |
Measurement key: extended and compressed lengths are measured between the centres of the mounting ends; stroke is the piston travel between those positions. The rod and tube measurements are diameters, in millimetres. Read the manufacturer gas spring fit-and-selection diagram (PDF) for the measurement illustration.
Not all 17-inch supports are interchangeable. GSNI-4032-28 has a 10-inch compressed length, 7-inch stroke and 8 mm tube. The separate GSNI-5200 17-inch family has a 9.66-inch compressed length, 7.34-inch stroke and 15 mm tube. Match the full spring and its force, not the extended length alone.
How to select the right spring
- Measure the old spring: use the centre-to-centre extended length and compare it with the listed compressed dimension.
- Match the original force: the GSNI-5150 family offers 20, 40 and 60 lb versions. Replacing a 20 lb spring with a 60 lb model is not an automatic upgrade.
- Check the body diameter: GSNI-4032 and 4033 have slimmer 8 mm tubes and different stroke lengths from the 15 mm 5150 family.
- Check the mounting hardware: inspect the ball sockets and clips; support the door before disconnecting a pressurized spring.
- Test full travel: once fitted, the hatch must close without compressing the spring beyond its rated length, and open without straining its hinges.
Secure the compartment door or platform before removing a gas spring, and do not puncture, heat or dismantle a pressurized support. The manufacturer force rating is a push force, not the door's rated weight.
Find the matching JR Products lift supports
The matching products are ordered online through NewRVParts and ship from supplier warehouses. In-person viewing and pickup are unavailable.
GSNI-5150-20
20 lb force with 6.09 in stroke and 15 mm tube; sold as an individual support.
GSNI-5150-40
40 lb force with 6.09 in stroke and 15 mm tube; sold as an individual support.
GSNI-5150-60
60 lb force with 6.09 in stroke and 15 mm tube; sold as an individual support.
GSNI-4032-28
28 lb force with 7 in stroke and 8 mm tube; sold as an individual support.
GSNI-4033-30
30 lb force with 6.5 in stroke and 8 mm tube; sold as an individual support.
Other lift-support references
For small compartments, compare the compact 7½–12-inch GSNI springs. The separately listed GSNI-5200 17-inch range and GSNI-5300 20-inch range have their own compressed lengths and force choices.
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