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 4140-00-991-3807
NSN 5920-01-369-0108
NSN 5925-01-578-6869
NSN 5895-00-173-7881
NSN 5920-01-170-3464
NSN 6145-01-655-7642
NSN 5935-01-224-4446
NSN 6110-01-250-7168
NSN 7035-00-096-9986
NSN 6620-01-512-8146
NSN 5945-01-102-0584
NSN 4140-01-032-3705