I recently purchased some speed bleeders for my Jeep and found a serious issue with the part numbers as given on the Russell performance site.
They list part # 639590 as the proper part for 1997-2006 TJ Front Disc, Rear Disc, and Rear Drum.
That part # is incorrect for the rear drum brakes on the TJ. After speaking with a few of the tech folks at Russell, one of which finally had the sense to contact the company that manufactures the part for them, I arrived at the correct part # for the rear drum.
Correct numbers for anyone who's interested:
Russell part #639590 Front Disc, 3/8"-24
Russell part #639530 Rear Drum, 5/16"-24
Made in the USA and work great.