OEM Rack on top of XJ

Does anyone know how the stock roof rack is held in place?
Also,IF whatever holds the rack in place can be purchased at a dealer or bone yard.I may of asked this before,but I'm old ..... :confused1

Screws going into little rubber bushings that are molded around a nut that go through a hole in the roof but when tightened will seal the hole and not let water through. The hole is about 1/2 inch in diameter. They are a pita to get in and out.

TEXJ said:

Screws going into little rubber bushings that are molded around a nut that go through a hole in the roof but when tightened will seal the hole and not let water through. The hole is about 1/2 inch in diameter. They are a pita to get in and out.

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Technically, they're called "well nuts" and you can get them at parts stores. It's hard to get an old one out, but fairly easy to get a new one in. If you have problems with heavy loads ripping them out, it is possible to replace them with "riv-nuts" or their equivalent "nut-serts" which are solid instead of rubber, but these may not seal as well, and will leak unless you seal and install them carefully. They must be a very precise fit in the hole. It's hard to find the rivnuts in the right size and thread, and they require a special tool to install, but they're strong. The hole in a rivnut goes all the way through, also, whereas the hole in the correct well nut is blind, so it won't leak through the threads.