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 4140-01-258-0071
NSN 5996-00-720-3064
NSN 5915-00-456-3448
NSN 5999-00-279-3540
NSN 5965-00-117-4214
NSN 6130-01-197-7397
NSN 5950-01-029-3292
NSN 5950-00-189-0551
NSN 6220-00-541-8515
NSN 5905-01-219-1821
NSN 5835-01-504-0837
NSN 6685-00-150-7080