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 5930-01-412-0636
NSN 4140-01-252-7492
NSN 5905-01-220-3443
NSN 6650-00-925-3587
NSN 5935-01-522-9454
NSN 5998-00-155-6002
NSN 6620-00-461-4934
NSN 6685-01-429-4735
NSN 6610-01-468-4745
NSN 5945-01-157-0361
NSN 2925-00-284-1534
NSN 6220-00-880-3181