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.
aisi 404f assn std single material response material document and classification, 0.246 inches minimum and 0.250 inches maximum face width, 0.499 inches minimum and 0.500 inches maximum outside diameter, not casehardened casehardening indicator, 0.374 inches minimum and 0.375 inches maximum bore inside diameter