A washer, round in shape, having a centrally located hole. One bearing surface is flat, the other surface is in the form of a raised shoulder (boss) having a flat bearing surface. Either or both of the bearing surfaces must be broken by a counterbore, countersink, or similar shaped recess. The thickness of the shoulder (boss) must not exceed 25 percent of the shoulder (boss) diameter. For items having a shoulder (boss) of greater thickness, use bearing, sleeve; bushing, sleeve; or spacer, sleeve. Excludes insulator, washer and thrust type washers.
Classification: Cotters, cotter-pins, washers and similar articles, of aluminum
NSN 6645-00-445-8143
NSN 6135-00-246-0324
NSN 5910-01-055-5620
NSN 6150-01-480-8719
NSN 5915-01-110-0227
NSN 6645-01-430-2420
NSN 5998-01-099-9835
NSN 5996-00-478-0197
NSN 6650-01-502-8629
NSN 5910-01-648-2045
NSN 5990-01-465-3088
NSN 6135-01-204-8712