LUSHIH RV Slide Out Support Jacks 2-Pack 21.4"–40" Adjustable Stabilizers, 5,000 lb Each

LUSHIH RV Slide Out Support Trailer Stabilizer Jacks are adjustable, heavy‑duty support stands that reduce slide‑out wobble and secure RV room extensions with up to 5,000 lb capacity per jack.

When parked, slide‑out rooms on travel trailers and fifth‑wheels can rock, bind, or shift—especially when people move around inside. These LUSHIH adjustable slide out stabilizer jacks provide a fast, compact solution to steady slide‑outs without lifting the trailer off its wheels. Constructed from zinc powder‑coated steel with a triangular threaded screw and M18 nut, the jacks resist rust and deliver repeatable support from 21.4" collapsed to 40" extended.

How do these stabilizer jacks stop slide‑out movement?

The jacks transfer lateral forces away from the slide mechanism and into the ground, minimizing rocking and reducing stress on seals and rails. They are designed to be set under the slide frame with a U‑shaped top that cradles the flange and spreads load across the foot.

• Use triangular screw body and M18 nut for steady, adjustable tension.
• U‑shaped 5.94" x 2.95" x 0.9" tops fit most slide frames.
• Recommended to place a 2x4 board on top to protect trailer framing.
• Each unit rated for 5,000 lb (2,267 kg) maximum lift capacity.

What are the key installation and sizing details?

Each jack adjusts between 21.4" and 40" travel range and offers about 19" of working height once positioned. Installation requires positioning beneath the slide frame, turning the nut or screw to take up slack, and ensuring clearance so the jack lifts smoothly.

• Travel range: 21.4" to 40" for varying slide heights.
• Working range: roughly 19" of usable adjustment under load.
• Simple placement—no permanent mounting or drilling required.
• Leave room around the jack during operation to avoid pinch or binding.

Are these jacks durable and suitable for outdoor use?

LUSHIH builds these jacks from heavy‑duty steel with a zinc powder‑coat finish to fight corrosion and abrasion from road grime and weather. The robust construction and threaded components are chosen to withstand repeated use at campsites and storage areas.

• Zinc powder‑coating improves rust resistance and longevity.
• Steel body and threaded hardware for reliable strength.
• Designed for parked stabilization, not for lifting trailer off wheels.
• Include two jacks for balanced support across a slide‑out.

Who is this for? These LUSHIH slide out stabilizer jacks are ideal for RV owners who want a quick, non‑permanent way to stop slide‑out wobble and protect slide mechanisms. They suit travel trailer and fifth‑wheel users, families with active occupants, and anyone who wants to reduce wear on seals and rails while parked. Note: do not use these jacks to level or lift a trailer—use them only to stabilize a parked slide‑out.