When you park your Airstream, it’s rarely on perfectly level ground. Chocks and blocks of wood or rubber under and around the wheels can help even things out and keep the trailer from moving, but stabilizer jacks are best for keeping your home on wheels from wobbling all over the place while you walk around inside.
The Airstream part number for the original jacks is 400093-A, and the manufacturer’s number for the replacements (which are pretty much identical) is 20-8-T.
You can weld the jacks to the frame, but it’s much easier (and equally effective) to simply bolt each jack to the frame of the Airstream (be sure to bolt to the appropriate cross members). I used self-threading bolts and drove them directly through each jack’s 1/4″ holes and into the Airstream frame. The bolts are really only holding the jacks to the frame; once opened, the jacks stay in place because the weight of the trailer is bearing down upon them (gravity!).
You will want to be sure you are getting jacks with the extended operating arm, as it protrudes farther to the edge of the trailer than the “normal” operating arm. If you have the shorter arm, you will have to crawl under your Airstream every time you need to extend the jack. The operating arm is turned by a crank, but I plan on keeping a socket in my Airstream toolkit so I can operate the jack with my drill (manual cranking is for chumps).
I have heard many tales of people forgetting to crank up their jacks when they leave a site. As you can imagine, this could cause some pretty serious damage to your trailer’s underside, not to mention destruction of the jacks themselves.
Also, NEVER use your jacks to lift the trailer. They are rated for 2,000#’s (static load) each, but they are NOT meant to lift your Airstream off the ground.
Deluxe BAL “T” Type Stabilizing Jack (20-8-T) mounting and operation manual via Norco Industries