Description
Manton 1989-17 12 & 24 Valve Cummins Rocker Arm Jam Nut 3/8 x 24 x .620 O.D. 12 pt. | 851
This rocker arm jam nut is made in the USA from Chromoly Steel, black oxide coated, designed to excel in the most intense applications or everyday use. We also custom-grind this adjusting screw in-house to reduce the diameter of the nut.
