
Has 5/8. Threaded on my 93 Dodge D350 Cummins 2wd Dual Drive with Alcoa rims. The nest was 7/8 or maybe 15/16 but I think it was a 7/8. Anyway I use them to true the rim because the OEM nuts are not tapered nor is the rim hub trued so there is nothing to true the rims on the car.