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Ultra-Fab Ultra Scissor Jacks - 30" Lift - 6,500 lbs - Qty 2

Ultra-Fab Ultra Scissor Jacks - 30" Lift - 6,500 lbs - Qty 2

Item # UF48-979031
Our Price: $170.22
Camper Jacks
This item qualifies for Free Shipping
Shipping Weight: 30 lbs
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This pair of scissor jacks can be either bolted or welded to the frame of your trailer or RV. Worm-gear mechanisms won't slip. Oversize footplates help to eliminate sinking and tilting. 1-800-940-8924 to order Ultra-Fab Products camper jacks part number UF48-979031 or order online at Free expert support on all Ultra-Fab Products products. Great prices and Fastest Shipping for Ultra-Fab Ultra Scissor Jacks - 30" Lift - 6,500 lbs - Qty 2. Camper Jacks reviews from real customers.
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  • Reviews (595)
  • Q & A (0)
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Ultra-Fab Products Camper Jacks - UF48-979031

  • Leveling Jack
  • Stabilizer Jack
  • Scissor Jack
  • 6001 - 7000 lbs
  • 30 Inch Lift
  • Bolt-On
  • Weld-On
  • 2 Jacks
  • Ultra-Fab Products

This pair of scissor jacks can be either bolted or welded to the frame of your trailer or RV. Worm-gear mechanisms won't slip. Oversize footplates help to eliminate sinking and tilting.


  • Scissor jacks level and stabilize 5th-wheel, travel, horse and cargo trailers
  • Heavy-duty worm-gear jacking mechanisms prevent slippage
    • Perfect for stabilizing loads
  • Large footplates provide excellent stability
  • Bolt-on or weld-on installation
    • (2) 3-1/2" x 7-1/4" long mounting plates have multiple holes to fit most applications
    • Mounting hardware not included (5/16" bolt recommended)
  • E-Z crank handle included
  • Sturdy steel construction
  • Black powder coat finish resists corrosion


  • Quantity: 2 jacks
  • Lift: 30"
  • Collapsed height: 4-3/4"
  • Collapsed length: 33-1/2"
  • Support capacity per jack: 6,500 lbs
  • Footplate dimensions: 5" wide x 9" long
  • Lifetime warranty

Note: These jacks are designed to stabilize a portion of your trailer's weight, not to support the full GVWR of your trailer. Do not use these jacks to lift your trailer or RV. Doing so will exceed the capacity of these jacks.

48-979031 UltraFab Scissor Jacks - 30" - 2 Pack

Customer Satisfaction Score:

Customer Reviews

Ultra-Fab Ultra Scissor Jacks - 30" Lift - 6,500 lbs - Qty 2 - UF48-979031

Average Customer Rating:  4.8 out of 5 stars   (595 Customer Reviews)

This pair of scissor jacks can be either bolted or welded to the frame of your trailer or RV. Worm-gear mechanisms won't slip. Oversize footplates help to eliminate sinking and tilting.


Very low quality. There reverse thread. And when you extend them the threaded rod ends up sticking out the hex side.


Purchased and received within four business days. I installed them on my 2015 Jayco fbds fifthwheel as an upgrade. I had to drill 2 new bolt holes on each side in order to secure each jack with 4 bolts. The Jacks I replaced were 24 inch, so these Jacks extend an inch or so when raised but not any further than the fender flares. Overall a quality product and easy to install.


Way better than the stock jacks on my 2022 Momentum 25g. Plug and play


Great product. Well built. Easy install. We have one touch automatic leveling system on our Grand Design 240RL fifth wheel. But still had movement inside the trailer. These scissor jacks did the trick. Very solid now.


I use these amidship to help the front and rear jacks. They add to the overall stability of our Sandstorm 5th wheel.


ubused the heck out of'em still in service,, great item..i really like e-trlr!!!!!!!


Recived my item quick worked great


I haven't had a chance to use them in a camping setup, but they were easy to install and in a couple of trial runs they work great. I was interested in these because they screw up/down from both ends of the jack. I believe this will improve the holding power of the jacks when deployed. My older jacks (which only had 1 screw point) would tend to back off during an extended camp stay.

Excellent. I believe they are stronger than the OEMs and have a higher lift height.
Thomas F - 04/04/2021


These are a great inexpensive method to have leveling And stability system on your trailer. Easy to install and works great.

A year later and about six RV trips the jacks are still working great. Its not the same as having auto leveling hydraulic jacks like you see on big rigs. But for your 30 or less bumper tow these are very functional.
RANDY B - 08/24/2021


Excellent service no delays


It only took about five minutes to replace my front leveling jacks with these new bigger jacks. Awsome lift capability and strength.

Great no problems
Ray f - 06/15/2018


These jacks are well built and have the extra height for uneven surfaces we were looking for. I find mounting this type of jack at a 45 degree angle to the frame is more stable than parallel or perpendicular. We used them all year and they are fine. My only comment to the maker is, something about the set-up of the threaded rod and 'nut' makes running them up and down take more force than should be needed, even before the base hits the ground and they pick up the weight of the trailer. They were that way out of the box. I use a battery-powered impact driver with a 3/4 socket to extend and retract, so no problem for me, but someone using the little hand crank supplied would build some muscles cranking them up and down by hand. I would purchase again if I needed replacements.


Very Poor quality. One of the jacks broke the second time I used them. The nut on the end of the screw that raises the jack broke free. I was only lifting one corner of a horse traier (no horses in the trailer).
The Trailer leveling blocks work fine, just as advertised.


An excellent quality scissors jack. I went with a 30 inch vice the 24 due to needing the extra lift in unlevel ground. They protrude about 4 inches on the sides but does what I wanted. I will replace the front ones sometime next spring using the 30 inch jacks also.


Still working great

The scissor jacks are still working great very durable
Tim - 01/11/2022


Not too impressed with the jack. It's built quite a bit lighter than I thought it would be. The side to side play (perpendicular to the "long" direction of the jack) is huge. With a bit of a lever arm the play is unacceptable. On top of that, on both jacks the center screw is far from being true. Both have a highly noticeable wobble. The nuts on the screw also came loose on both jacks after some usage.

The upside to this jack is you do get the 30 inches of stroke, though as flimsy as these things are built I'd be wary to test the 6500lb rated capacity.


Installed these on the rear of a nine month old 44 foot toy hauler. Why you ask? Well, I got tired of the error and fault codes associated with the electric leveling system.
These jacks are heavy duty and I like the 30 inch option since this will leave plenty of jack unopened and I suspect will deliver a steadier support.
Mounted in about thirty minutes and looks/works great.
Electronics are good when operates properly and without error, but there is something to be said about the old manual way.
Highly recommend.


Perfect for what I needed - heavier and more sturdy than the ones I had on my travel trailer. Shipped/received FAST


I am more than happy with the scissor jacks, very high quality and easy of shopping of the web site is great.


After a year, I found these jacks to be well made and functional. I camp in some unstable areas with a few Highs and Lows. The extra reach of these jacks is well worth the price. Of course, I have to maintain the screws with a little grease once a year. I fully recommend these jacks!


Recieved my new jacks a couple weeks ago. Install was a breeze. I am very happy with the operation and quality of these jacks.


I thought they were well worth the money. My only issue was I had to mount them perpendicular to the frame. I was hoping they could have been mounted on the frame work of the tongue. Since I had to mount them were I did they stick farther than I like, but they work great.


works as expected and as usual for these not for use to free tire from the ground. I liked the extended height of these. they Will help stabilize my new 34' camper. defiantly need to use a drill to extend or retract them. takes quite a few turns to raise or lower a couple inches.


Worked great shipped as promised


I added these jacks at the mid span of my camper (right at the axles). It made a huge difference in the stability of the parked camper. The prep uncles holes in the mounting plate made the install simple!

Show More Reviews

See what our Experts say about this Ultra-Fab Products Camper Jacks

  • Scissor Jack Stabilizer Recommendation for a 7,000 lb Trailer
    The capacity for scissor jacks is a static capacity which means that it can support up to that amount of weight but can not lift that amount. For a 7,000 lb trailer the Ultra Fab Scisso jacks # UF48-979031 that you referenced would work just fine. I attached a review video for you to check out as well.
    view full answer...
  • Using Ultra-Fab # UF48-979002 Stabilizing Jacks on Motorhome Instead of a Trailer
    There's no reason why you couldn't use the Ultra-Fab # UF48-979031 scissor jacks to stabilize your RV when it's parked. Keep in mind these aren't meant to jack the RV off the ground, but are meant to keep the vehicle stable while you move around within it. The jacks can be welded on or bolted in place, your choice. I'd recommend installing them to the underside of a substantial fame or cross member. There aren't any specific installation instructions as the location and method of installation...
    view full answer...
  • Can the Ultra-Fab Ultra Scissor Jacks # UF48-979031 Level a 8,500 lb Trailer
    You can level your trailer with the Ultra-Fab Ultra Scissor Jacks # UF48-979031 but actually lifting totally off the ground wouldn't be recommended. Also, these jacks have a 6,500 lb capacity per jack so they would do a great job on your trailer that weighs 8,500 lbs total.
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  • Distance Between Outside Round Mounting Holes for Ultra-Fab Ultra Scissor Jacks
    The distance between the 2 outside mounting holes on center on Ultra-Fab scissor jacks # UF48-979031 is approximately 6 inches. I have included a picture that shows this and other dimensions for you. The picture is on the single scissor jack but it is the same on both jacks that come in the pair, # UF48-979031.
    view full answer...
    Image 1 for
  • How Should Ultra-Fab Ultra Scissor Jacks be Mounted to a Trailer
    Since there is no specific hardware kit for the scissor jacks, # UF48-979031, I recommend going with the largest bolts that will fit, grade 5 or higher, if you will be bolting the jacks on. They can also be welded on, which will be the strongest option. Welding should be performed by a qualified professional. There are no specific instructions because each trailer will be different. Of course you will want the end for the handle to point out so you can access it. Other than that there...
    view full answer...
  • Does the Ultra-Fab Ultra Scissor Jacks # UF48-979031 Have a Lift Capacity
    The Ultra-Fab Ultra Scissor Jacks, part # UF48-979031, are stabilizer jacks which are designed to be attached to the frame of your trailer or RV and crank down to stabilize a portion of the trailers weight. It has a support weight capacity of 6,500 lbs. This stabilizer jack does not have a lift capacity rating because is not designed to do any lifting of your trailer, plus you do not want to lift or level a trailer or RV because you can cause damage to it. A trailer frame is not intended...
    view full answer...
  • Using The Ultra-Fab Ultra Scissor Jacks # UF48-979031 on Uneven Terrain
    The 3-1/2 x 7-1/4 inch mounting plates are attached to the top of the Ultra-Fab Ultra Scissor Jacks # UF48-979031, and have multiple mounting holes. I used an existing picture and circled the mounting plate that you referenced. The overall length of the mounting plate is 7-1/4 inches, and the width is 3-1/2 inches. The bottom plate of the jacks will not tilt with the terrain. You will want to make sure that 100 percent of the base of the scissor jack is in contact with the ground and as...
    view full answer...
    Image 1 for
  • Where to Install Scissor Jacks on 5th Wheel Trailer with Stabilizer Jacks
    The best place to add the scissor jacks would be the rear corners of the trailer frame as that will give you the most stabilization and it's the standard location for installing them. If you have a set already installed there then I would go right at about half way between the landing gear jacks and the current scissor jacks.
    view full answer...
    Image 1 for
  • Are Scissor Stabilizer Jacks for Travel Trailer Rated Per Jack or As a Pair
    The support capacity of the scissor jacks are for each jack individually. So the part # UF48-979031 comes with two jacks that are each rated for 6,500 lbs. So you'd multiply that by how many jacks you end up using
    view full answer...
  • Can Ultra-Fab Ultra Scissor Jacks # UF48-979031 be Used for Leveling and Stabilization
    The Ultra-Fab Ultra Scissor Jacks # UF48-979031 that you referenced can be used for leveling and stabilization. They have a support capacity per jack of 6,500 lbs and as long as you aren't trying to lift the wheels of the RV off the ground you'd be fine.
    view full answer...
  • What is the Gauge of the Metal of Ultra-Fab Ultra Scissor Jacks
    I reached out to a representative of Ultra-Fab who told me that the Ultra-Fab Ultra Scissor Jacks # UF48-979031 are made of 14 gauge powder coated steel. They also said that what gives the jacks their strength is only partially due to the thickness of the steel. The strength also comes from the fact the metal is reinforced with a folded edge for added rigidity, and there are also grooves pressed into the metal which help fortify them. These jacks have a 6,500 lb support capacity and you...
    view full answer...
  • Replacement Stabilizer Jack Recommendations
    When it comes to jacks, even stabilizing jacks, the higher the capacity the better. It makes it easier on the jack that way. The scissor jacks we have with the most capacity are the Ultra-Fab Ultra Scissor Jacks - 30" Lift - 6,500 lbs - Qty 2 Item # UF48-979031. They are rated for 6,500 pounds each. There isn't a quick on/off bracket for jacks like what you are describing so that would have to be fabricated. But you may want to reconsider because that set up would allow movement of a trailer/RV...
    view full answer...
  • Recommended Front and Rear Stabilizer Jacks for 2005 Jayco Jay Feather 29N
    For your 2005 Jayco Jay Feather 29N, I recommend the Ultra-Fab Ultra Scissor Jacks - 30" Lift - 6,500 lbs - Qty 2 # UF48-979031. These jacks are very sturdy and able to easily adjust for stability. These will work very well for your front and your rear stabilizers and are highly preferred by our customers over the style of jack in your photo.
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    Image 1 for
  • Recommended Stabilizer Jacks for a 2017 Winnebago View
    If you are looking for jacks to help stabilize the RV while parked, eliminating side to side rocking then I recommend using a set of scissor jacks like the Ultra-Fab Ultra Scissor Jacks part # UF48-979031 on the rear of your 2017 Winnebago View. You can attach these jacks to your RV by either bolting or welding. The jacks themselves offer up to 30" of lift and 6,500 lbs of support per side. They have a black powder coated finish and come with a lifetime warranty. I have attached a review...
    view full answer...
  • What is the Weight of Each Jack for the Ultra-Fab Ultra Scissor Jacks # UF48-979031
    The Ultra-Fab Ultra Scissor Jacks # UF48-979031 that you referenced have a weight of about 14 lbs individually. Their combined shipping weight is 30 lbs.
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  • Recommended Replacement Scissor Jacks for Forest River Flaggstaff E-Pro
    It looks like the Forest River Flaggstaff E-Pros come with scissor jacks so if you're just looking to replace one or multiple you'll just need to know the lift height of the factory jacks. The Ultra-Fab Ultra Scissor Jacks part # UF48-979031 offer up to 30" and feature a double threaded design for faster deployment.
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  • Are Ultra Fab Scissor Jacks # UF48-979031 Correct Size for 7,100 lb Trailer
    Based on what you have now with the part # UF48-979031 which are the correct size and rating for your trailer I would say that what you had prior was way too small. This makes sense when you consider that the smaller ones ended up bending and getting damaged.
    view full answer...
  • Trailer Scissor Jacks Lower On Their Own
    The most likely cause of the scissor jacks extending on their own can be attributed to a stripped or worn jack nut. The jack nut is simply the nut attached to the pivot which the long threaded rods screw in and out of to raise or lower the jack. This can fail for a few different reasons, one being overextending the jack. These jacks are designed to stabilize the trailer, not lift it which would put too much pressure on the jack and cause it to strip. That's not to stay this is your exact...
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    Image 1 for Image 2 for
  • Recommendation for Stabilizers on Pop Up Camper
    Typically, pop up camper owners will use scissor jacks like the Ultra-Fab Ultra Scissor Jack, # UF48-979002, to stabilize their camper. This pair of scissor jacks can either be bolted or welded to the frame of your camper and has a 24 inch lift. Each jack has a support capacity of 6,500 pounds. Ultra-Fab also offers these jacks in a 30 inch lift, # UF48-979031.
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  • Difference Between Ultra-Fab Scissor Jack Part Numbers UF48-979032 and UF48-979031
    The Ultra-Fab Ultra Scissor Jacks # UF48-979031 that you referenced is a quantity of 2 of the Ultra-Fab Ultra Scissor Jack # UF48-979032. So its the same jack, but one part number you get a pair of them and the other part number you get just one.
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  • Heavy-Duty Scissor Jacks for 15,000 lb Tiny Home
    We have scissor jacks that will work for you, just keep in mind that scissor jacks are only designed to stabilize a portion of your weight as opposed to the full 15,000 lbs. The scissor jacks with the largest capacity are the Ultra-Fab Ultra Scissor Jacks # UF48-979002 (24" lift) and # UF48-979031 (30" lift). These jacks have a 6,500 lb per jack capacity so the pair will have a total support capacity of 13,000 lbs. So long as part of the weight is spread out on your tiny home these jacks...
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  • Determining The Correct Manual Stabilizing Jacks For 2012 Fun Finder 21 S/C
    To determine which manual stabilizing jack will work for your 2012 Fun Finder 21 S/C you will need to determine how much lift you need for the jack to work properly. To do this you will want to measure from the bottom of your trailer's frame to the ground. If you get a measurement less than 24" the Ultra-Fab Ultra Scissor Jack - 24" Lift - 6,500 lbs # UF48-979006 would be a great choice as it offers up to 24" lift to stabilize your trailer. If you need more lift then you would want to...
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  • Replacement Stabilizer Jacks for a 2005 Forest River Cherokee 26RR
    The stabilizer jacks on your 2005 Forest River Cherokee 26RR are pretty much universal so you will not need to know the exact part number in order to replace them. For a replacement, I recommend taking a look at the Ultra-Fab Ultra Scissor Jacks part # UF48-979031 which offer 30" of lift and have a 6,500 lb capacity. I recommend replacing the jacks in pairs but if you would just like to replace one then you can use part # UF48-979032. The Ultra-Fab Ultra Scissor Jacks will be an excellent...
    view full answer...
  • Recommended Stabilizer Jacks for a Class A Motorhome
    For your Class A Motorhome you are probably going to want to use the Ultra-Fab Ultra Scissor Jacks part # UF48-979031 instead of the Ultra-Fab Ultra Scissor Jacks part # UF48-979002 as they offer more lift which will be needed. They are designed exactly for what your asking which is to help stabilize the motorhome while parked. They will do an excellent job of this and you can install as many of them as you like but you will want to match the numbers on each side. They will require drilling...
    view full answer...

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