(4) 10.9 Class (metric equivalent to Grade 8) hardened yellow zinc plated flange bolts, prevailing torque flange lock nuts and flag nuts for the front or rear upper control arms on 1997-2006 Wrangler TJ and LJ. The flag nuts are used on the frame side. They replace the weak factory flag nuts. They are double the thickness of OEM, 10.9 Class prevailing torque flanged lock nuts are welded to the brackets (not just press fit like OEM) and they are yellow zinc plated for excellent corrosion protection. Flag nuts replace Mopar 6503648. Includes enough bolts and nuts for either the front or the rear upper control arms, if you need both front and rear order 2 sets. High quality direct OEM replacement.