28 in 150Lb Gas Struts PM3990 Set of 2 - Heavy Duty Lift Support

In this review of the PM3990 28 in 150Lb gas struts, the bottom line is straightforward: these are a robust, universal replacement for heavy lids and awnings where a strong, durable lift support is required. Designed as a 2-piece set, each strut provides 150lb of force and extends to 28.74 in, making them especially useful for RV basement doors, camper awnings and heavy trailer caps. The reviewer found the build quality and fit to be the primary reasons to buy, since they meet OE matching specifications and arrive with clear installation guidance.

Key Features

• Universal fit: Works for camper awning, RV awning, floor hatches, trap doors and heavy truck caps for broad replacement use.
• Defined dimensions: Compressed length is 16.06 in and extended length is 28.74 in, which simplifies confirmation of fit before ordering.
• Strong lift force: Each strut delivers 150lb (667N) of force, suitable for heavier doors and awnings that need substantial support.
• OE compatibility: Designed to meet or exceed original equipment form, fit and function for straightforward replacement.
• Durability features: Leak-proof piston seals and rust protection help resist temperature extremes and extend service life.
• Installation guidance: Comes with instructions and suggestions to adjust mounting points to tune force and fit during installation.

Who It's For

The PM3990 28 in 150Lb gas struts are best for RV and camper owners, trailer and truck cap users, or anyone replacing a heavy basement or floor hatch that requires a high-capacity lift support. Installers who need an OE-matching replacement with clear dimensions will appreciate that both length and force are specified.

These are not aimed at light-weight lids or small access panels where a lower force or shorter strut would be more appropriate; buyers should measure weight and length and confirm mounting hardware needs, since the set does not include ball studs.

Pros & Cons

Pros

• Direct replacement fit for many RV basement doors and heavy hatch applications based on customer reports of good fit and functionality.
• High 150lb force per strut gives reliable support for heavy doors and awnings.
• Designed with leak-proof seals and rust protection for longer service life in harsh conditions.
• Includes installation instructions and guidance to help adjust mounting points for proper operation.

Cons

• Does not include ball studs, so additional mounting hardware may be required for some installations.
• At 150lb per strut, they are overkill for light lids and could make small doors hard to close.

Specifications

Our Verdict

The PM3990 28 in 150Lb gas struts are a practical, value-minded choice for anyone replacing heavy awning supports, RV basement doors or truck cap lids. They deliver solid lift force, OE-style fit and protective seals that make them durable in outdoor conditions. Measure weight and mounting length before buying and add mounting hardware if needed, but for true heavy-duty lift needs these struts offer dependable performance and good longevity.

Frequently Asked Questions

Do these struts include mounting hardware?
No, the set is sold without ball studs; customers should confirm and obtain compatible mounting hardware if required.

Are these suitable for RV basement doors?
Yes, customers report they fit and function well as direct replacements for many RV basement doors when the lengths and force match.

Can the force be adjusted during installation?
You cannot change the internal force, but adjusting mounting points can change the effective assistance during use.