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, mil-s-6758 mil spec single material response material document and classification, 0.505 inches minimum and 0.510 inches maximum face width, 0.312 inches minimum and 0.314 inches maximum bore inside diameter, 0.437 inches nominal outside diameter