ARP Rocker Arm Stud Pro Series 8 mm x 1.25 Base Thread 5/16-24" Top Thread - 0.500" Long 11000304 Nuts have a built-in washer

Nuts have a built-in washer with a serrated face to lock nut tight against panels

Terminals are machined from solid brass stock

Mount aftermarket seats quickly and easily

This system weighs 2-1/4 lbs

you can select one of the systems available for carbureted or fuel injected engines

ARP Rocker Arm Stud Pro Series 8 mm x 1.25 Base Thread 5/16-24" Top Thread - 0.500" Long 11000304 Nuts have a built-in washerARPs product line contains thousands of part numbers, and has expanded to include virtually every fastener found in an engine and driveline. These range from quality high performance OEM replacement parts to exotic specialty hardware for Formula 1, IndyCar, IMSA, NASCAR and NHRA drag racing and marine applications. Since 1968, ARP is the fastener of champions and the world leader in fastener technology. Product Description: Rocker Arm Stud Pro Series