Summit Racing Part Number: CRO-74522 Rocker Arm Screw Material: Billet steel Rocker Arm Screw Finish: Black oxide Rocker Arm Screw Thread Size (in.): 3/8 in. x 24 Rocker Arm Ball/Cap Diameter (in.): 5/16 in. cap Rocker Arm Screw Locknut Included: ...