Matl steel qq-s-752 or equivilent, cylindrical shape, 1.50 in. O/a lg, 1.060 to 1.065 in. Od, left end bore 0.656 in. Id by 1.188 in. Deep, counterbore 0.969 in. Id by 0.44 in. Deep, packing groove on od 0.19 in. W by 0.806 to 0.807 in. Od, located 1.00 in. From right end