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.
0.500 inches nominal outside diameter, 0.250 inches nominal bore inside diameter, 0.240 inches minimum and 0.250 inches maximum face width, not casehardened casehardening indicator, ams 5643 assn std 1st material response and mil-b-5687, type 2, comp b mil spec 2nd material response material document and classification