This Moroso 7/16- 20 wheel stud measures 2 7/8 inches long. It has a 0.560 inch knurled shank and presses into the wheel hub. The stud also has a quick start or “bullet” nose to facilitate lug nut installation. It is intended for use on the front axle of a race car. You should use a larger stud out back if you have aftermarket axles. Here’s another stud type you might come across. Initially designed for NASCAR competition, it has a “quick start” segment machined on the nose so a stock car-style quick start or acorn type lug nut can be installed quickly without cross threading. This stud is also installed from the backside of the axle, using a lock washer for retention. This is a 1/2-20 x 3 1/2 inch long axle stud for use on rear axles. It screws into the backside of the axle and is held in place with a lock washer. The stud head on this stud must be torqued to 65 lbs.-ft. It is a good idea to use a “severe service” thread locking compound like red Loctite on the bolt/flange (not on the actual lug segment of the stud!) Often referred to as a drive stud, this axle stud has a 5/8-18 inch thread on each end with an 11/16 inch shoulder in between. The shorter threaded segment fits in the axle flange and is secured with a jam nut. The shoulder (see the pointer) is the same OD as the lug hole ID found on most aluminium racing wheels. This ensures that the stud actually does the driving of the wheel, not the lug nut. Several manufacturers offer a series of lug nuts including the standard flanged model on the left and a series of reduced hex nuts. Made for use with drive studs, these nuts have a 7/8 inch hex head and require special thickness washers. 13 fastlane