ARP Rocker Arm Nut - 7/16-20 in Thread - 0.550 in Shank Diameter - 1.200 in Long - Chromoly - Black Oxide - Aluminum Rockers - Set of 16 IH100020 1998-1999 Ford Econoline Super Duty

1998-1999 Ford Econoline Super Duty

and a domed Holley decal can be placed on the aluminum insert or directly onto the cap base

3/8" NPT ports

PairVehicle Applications: Jeep: TJ 1997 - 2006

ARP Rocker Arm Nut - 7/16-20 in Thread - 0.550 in Shank Diameter - 1.200 in Long - Chromoly - Black Oxide - Aluminum Rockers - Set of 16 IH100020 1998-1999 Ford Econoline Super DutyA rocker arm adjuster that doesn't require special tools and won't work loose. Threads on the heat treated Perma Loc Adjusters are machined exactly perpendicular to the adjuster bottom. a set screw is also machined flush on the bottom. All of these features help eliminate setting valve lash on a regular basis. ARPs product line contains thousands of part numbers, and has expanded to include virtually every fastener found in an engine and driveline.