I stripped a couple lug nuts before I realized I should probably use my torque wrench

And quite a few have had the outer caps fall off leaving just the nut.

Is there a certain type I should buy? Different grades?
Maybe someone has a link to the kind I need?

 

You can get them at any parts store. Pretty standard part. Also places like Quadratec have them if you want to pay shipping. Just go see NAPA, Advance Auto, Car Quest, etc.

 

You say that you "stripped" a couple of lug nuts, correct. Not sure if you mean the male stubs of which there are five per hub, or the acorn style nut which are stainless stell on the later XJ's.

The thread size is 1/2"-20. They are most likely, what is called "cross threaded" rather than stripped. Cross threaded means the nut will go on the stud and can be tightened, but only with much force from the very beginning. In other words, you can't hand tighten them down the stud and then use your lug wrench to torque to the proper setting.

If the studs, and/or the lug nuts, are cross threaded then they are repairable without replacing them. What you will need to purchase are two things; 1) a 1/2"-20 thread die for re-threading the studs, and 2) a 1/2"-20 thread tap for the nuts. You will also need a small can of cutting oil. All of this is most likely available at NAPA (maybe next day pick-up)

The process is quite forward, the die screws onto the individual studs and re-cuts the thread. You would rotate it clock-wise one to one & 1/2 revolutions them back it off in order to clear the "chip" of metal. a bit more oil, them clock-wise again. This is easy work but time concuming. It is much easier than having to replace 5 wheel studs per hub, times four hubs; agreed?

The thread die has a hexagon O.D., so you will need an adjustable wrench to use in order to turn the die on the studs. The wheel nuts came two ways, either stainless steel or crome plated carbon steel. The S.S. is a little bit harder than carbon steel and it take a bit more force and caution when re-tapping the S.S. One needs to be careful not to break the tap inside the nut. Any questions, let me know. Webb

 

those capped nuts are garbage. not worth replacing with same.

i am lucky to have an army surplus store near me that has everything and i found some really nice solid shiny chrome lug nuts for a buck a piece. same ones at crappy tire are 6 bux a piece.
they are 13/16 rather than 3/4 inch, so maybe that will help you find some better ones. just be sure they are 1/2 inch thread.

 

Caged is lucky to be close to the KW Surplus. If your not then new nuts at Napa for $1 each, 1/2-20unf, 13/16 wrench flat on acorn end, plated, no shield cap to deform, get a full set of 20 and couple spares for the glove box, torque not less than 80 not more than 100 ft lb, use anti sieze inside the nut or on your studs, done both the XJ and ZJ, no futher problems, even the chrome holds up thru 2 winters.

 

Well the nut is definately stripped. The threads are peeled off. I just wasn't sure about size and type. But now I know thanks guys

 

Gorilla nuts