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 6150-00-613-0343
NSN 6130-00-004-1890
NSN 6135-01-140-8201
NSN 5895-00-063-0591
NSN 5895-01-020-8990
NSN 5945-01-053-3279
NSN 5999-00-223-4266
NSN 6685-01-075-6971
NSN 5905-01-345-4949
NSN 4140-01-540-3201
NSN 5915-01-420-6615
NSN 5985-01-084-9087