As a friend of mine used to put it "stop 1/4 turn before she strips". I have an OEM service manual at home but I don't know if it will list that spec. I just tightened them down and haven't had any issues. It's a good practice for CJ owners to go around and check/tighten everything once a year or so. Kind of like the old Harley's of the seventies.
MINE: 1995 YJ/2.5L/115K/Completely Stock
MY DAD's: 1978 CJ7/ AMC 360 .030" over/ Motorcraft 2100/ Edelbrock Performer/ Proform HEI Ignition/ Hedman Headers with dual Flowmaster 40's/ Taurus Fan/ FK-35 Control/ Painless Harness/ Rebuilt T150 & Dana 20/ 4" Lift/ 31" Procomp Mud Terrains/ All Fiberglass. (SOLD)
MY BROTHER's: 1996 ZJ Limited/5.2L/117K & Completely Stock.(SOLD)