Professional tool for commercial or occasional use 3/8" UNF wheel studs Manufactured from steel and gold and zinc plated for strength and durability Total length of the stud 37mm (from outside to outside) Total length of the thread 21mm Total diameter of the spline 10.5mm (this is the bit that fits into the hub itself) This is the most common size for all unbraked hubs as well as also mini equivalent as well This listing is for a pack of 16 wheel studs