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 6145-01-153-7197
NSN 6620-01-348-8256
NSN 6135-00-416-2898
NSN 5990-00-118-8953
NSN 5905-01-598-8886
NSN 5920-01-498-0847
NSN 5930-00-379-2227
NSN 5945-01-407-8703
NSN 6150-01-448-5230
NSN 6240-01-119-9292
NSN 6610-00-064-9351
NSN 4140-01-634-0330