This stud fits most popular AJ, BAE, Coline, and Total Flow valve cover/cylinder head combos with fabricated Williams valve covers. Stud is coarse on the nut side so removing between rounds becomes even quicker. For nuts check out #450-0008U or #450-0008W.
Stud measures 1.700" overall with .500" of course, .375" of shoulder, .600" of coarse thread for the nut and .187" of starter point. Will not work with conventional cast alum/mag valve cover.