A cylindrical body having a centrally located hole to accommodate a pin or shaft for attachment to a push rod guide, yoke, rocker arm, turntable, or rail. The item provides a rolling contact with the face of a valve stem, or the lobes of a cam ring or camshaft on engines, fuel injection pumps, latches, turntables, parallel bearing surfaces requiring a roller support, and the like. Excludes:bearing, roller, cylindrical; roller, electrical switch; and friction bearings. See also cam follower, needle bearing.
not casehardened casehardening indicator, qq-b-750 comp b fed spec single material response material document and classification, 0.1562 inches minimum and 0.1567 inches maximum bore inside diameter, 0.124 inches minimum and 0.125 inches maximum face width, 0.370 inches minimum and 0.380 inches maximum outside diameter