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 2925-00-251-0105
NSN 2925-01-336-8019
NSN 5910-01-250-2371
NSN 4140-01-209-5335
NSN 5930-01-161-3736
NSN 6135-01-613-8043
NSN 6650-01-388-8727
NSN 6610-01-459-8722
NSN 4140-01-242-2296
NSN 5960-01-195-7590
NSN 5915-00-203-5890
NSN 6620-01-411-5750