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 5950-01-180-4032
NSN 5935-00-728-6860
NSN 6645-01-324-1956
NSN 6620-01-274-0203
NSN 6650-00-021-9555
NSN 5935-01-308-0318
NSN 5998-01-421-3503
NSN 6645-01-277-0530
NSN 6110-01-491-2158
NSN 6150-01-534-6913
NSN 5950-00-910-3915
NSN 5998-00-827-0527