I have a thread restorer set that I use to determine thread pitch and size. All of the restorers for bolt threads look like nuts. Each has the size and thread pitch printed on it. A very handy set of tools to have on hand to answer this type of question. A lot of parts on my '92 are metric. Be aware of that as you try to determine what it is.
Participate in life....Keep movin'....Go there....JK'n it.........Do it! Jeep #1: Red Rock 08 JK Rubicon 4dr, 6 sp manual, Stock Mud Tires, MyGIG Upgrade, Hard Top, after sale BestTop SunRider Soft Top, Congo Cage Rack, Mopar slush mats Jeep #2 Black 08 JK Rubicon 2dr, 6 sp manual, both tops, some chrome...uggg (my wife's jeep) Jeep #3 White 92 YJ (my son's jeep) A great quote from a good friend: "All hail click clack and master jk'n." Click and clack are my idols!