Identify Attwood SL3, SL34 and SL38 Marine Gas Struts
Two Attwood springs may both measure 20 inches when extended yet attach to the boat in different ways. The SL34 family has 10 mm socket ends; SL3-60-5 has flat blade ends. The SL38 family extends farther, to 23 inches. The original part number, end fittings and force marking should all agree before replacement.
Different attachment styles on similar-looking supports
Socket-ended SL34 and SL38
SL34 compresses to 12 inches and travels 8 inches. SL38 compresses to 13.12 inches and travels 9.87 inches. Each model is listed in more than one force rating.
Blade-ended SL3
SL3-60-5 has a 20-inch extended length like the SL34 group, but its 10 mm blade end differs from the round ball-socket fitting. Do not substitute it based on length alone.
Hatch strut identification by exact number
| Attwood MPN | Family | Extended | Compressed | Stroke | Force | Fitting |
|---|---|---|---|---|---|---|
| SL34-30-5 | SL34 | 20 in | 12 in | 8 in | 30 lb | 10 mm socket |
| SL34-40-1 | SL34 | 20 in | 12 in | 8 in | 40 lb | 10 mm socket |
| SL34-60-1 | SL34 | 20 in | 12 in | 8 in | 60 lb | 10 mm socket |
| SL34-80-1 | SL34 | 20 in | 12 in | 8 in | 80 lb | 10 mm socket |
| SL3-60-5 | SL3 | 20 in | 12 in | 8 in | 60 lb | 10 mm blade |
| SL38-30-1 | SL38 | 23 in | 13.12 in | 9.87 in | 30 lb | 10 mm socket |
| SL38-60-1 | SL38 | 23 in | 13.12 in | 9.87 in | 60 lb | 10 mm socket |
The SL3 and SL34 families can have the same extended length and output force while using different end fittings. Confirm the mounting hardware before replacing.
Check a removed strut carefully
- Before removal, restrain the hatch or lid independently; gas struts can fail without warning.
- Read the stamped model number. SL3-60-5, SL34-60-1 and SL38-60-1 are three different supports despite their 60 lb rating.
- Examine whether the end is a flat blade or a ball socket, and compare the hinge or bracket pin diameter.
- Check the piston rod for corrosion, bends or scoring and the mounting points for damage. Never drill, heat or puncture a charged gas strut.
- Verify the listing's stated condition and included pieces. Viewing and pickup at UsedRVParts in Kelowna are by appointment.
Find the matching Attwood hatch strut
Open the individual listing to review its condition, photograph and supplied parts.
Comparing shorter gas springs?
See our Attwood 15- and 17.2-inch support reference to identify the other length family before replacing brackets or changing the hatch opening.
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