The Ford Oval is cut sharply into the top of each wing nut. The lower ends of the shafts are manufactured with wide shoulders for broad load distribution. All nuts are supplied with a separate stud which permits precision gasket positioning on the head prior to mounting the valve covers. 1/4-20 threads. Note: Does not fit FE engines. Product Features:Valve Cover Wing NutsBlack Crinkle FinishMade from High-Quality Steel1/4-20 Thread,4.5-inches Tall, 1.375-inch Studs Included1-inch Stud Length