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 6620-01-383-1997
NSN 2925-01-448-2880
NSN 6320-01-211-6578
NSN 5935-01-070-5369
NSN 6130-01-137-4187
NSN 5998-01-649-4365
NSN 5930-01-288-3021
NSN 5855-01-571-6715
NSN 6620-00-467-7414
NSN 5998-01-358-1931
NSN 5895-01-089-7858
NSN 5835-00-389-2816