My son bought a Bungee 4wd nitro buggy from www.minirccars.com. After about 20 mins. of running the car the nut that holds the throttle linkage on the carburator vibrated off (my fault I did not check the tightness). I have looked for this nut at hobbytown and several other hobby shops along with all the local nut and bolt dealers. I think it is an M6-.5 thread pitch. Can anyone help me find this nut or give me an idea how to fix it another way? Also the parts list for the car has everything but the nut I need.