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 4140-01-061-2431
NSN 5895-01-605-3539
NSN 5985-01-618-4559
NSN 6650-01-363-6675
NSN 5910-01-328-8539
NSN 5998-00-009-8964
NSN 5905-01-118-5658
NSN 4140-01-629-5629
NSN 6145-01-221-6518
NSN 5905-01-331-5778
NSN 6650-01-046-3718
NSN 5915-00-158-5380