LUSHIH RV Slide-Out Stabilizer Jacks, 2-Pack 21.4"-40" Telescoping 5,000 lb Each

LUSHIH RV slide out support trailer stabilizer jacks are a pair of adjustable, heavy‑duty steel supports rated for 5,000 lb each and designed to reduce slide‑out sag and eliminate interior rocking.

If your travel trailer’s slide‑out moves, sags, or causes the cabin to rock when people walk inside, these stabilizer jacks give a simple, mechanical way to brace the slide‑out from beneath. Each jack telescopes from 21.4" to 40" travel (19" working range) and uses a triangular threaded screw with an M18 nut for secure, incremental adjustments. The zinc powder coat provides corrosion resistance for seasonal exposure, while the U‑shaped top fits most slide‑out frame rails.

How do these jacks stop slide‑out movement?

The jacks work by bearing pressure under the slide‑out frame so the mechanism doesn’t bear all movement. Tightening the screw transfers lateral forces into the jack and ground, significantly reducing bounce and vibration when people move inside.

• Direct vertical support under the slide‑out frame to limit flexing.
• Triangular threaded screw and M18 nut for fine adjustments and secure locking.
• Suggested use of a 2x4 on top to spread load and protect the trailer rail.
• Designed for parked stabilization, not for lifting a trailer off its wheels.

What are the size and capacity details I should check?

Each stabilizer jack travels from 21.4" to 40", with a safe working range of about 19" and a maximum lift capacity of 5,000 lb (2,267 kg) per jack. Confirm there is enough clearance under your slide‑out and that the U‑shaped top interfaces with your frame profile.

• Travel range: 21.4"–40"; working range: approximately 19".
• Maximum rated capacity: 5,000 lb (2,267 kg) per jack.
• U‑shaped top measures 5.94" x 2.95" x 0.9" to fit most slide rails.
• Check clearance and use a protective 2x4 to prevent frame marks.

How do I install and use the LUSHIH slide out stabilizers safely?

Installation is straightforward: position a jack beneath the slide‑out frame, ensure clearance around the jack, then raise it until firm contact is made and vibration is reduced. Operate with care and avoid using the jacks to lift or level the entire trailer.

• Place jack under the slide‑out rail with the U‑shaped top centered.
• Rotate the triangular screw to raise until snug but not over‑tightened.
• Use a 2x4 between jack top and frame to protect finish and spread pressure.
• Do not use jacks to lift trailer off wheels or for primary leveling.

Who this is for: These LUSHIH stabilizer jacks suit RV owners, weekend campers, and contractors who need a quick, reliable way to stop slide‑out sag and eliminate interior rocking while parked. They’re ideal if you want durable, adjustable support that’s easy to fit beneath most slide rails, resists rust for seasonal storage, and gives solid backing during occupancy. Note: purchase includes two quick‑lift jacks; always follow manufacturer safety guidance and never use these jacks as the primary method to lift or level a trailer.