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 6320-01-522-0318
NSN 6150-01-023-7710
NSN 6150-01-284-8777
NSN 6110-01-383-6517
NSN 6650-01-142-7673
NSN 6220-00-854-2532
NSN 5915-00-278-5561
NSN 5950-01-536-1161
NSN 6240-00-839-5118
NSN 7035-00-455-7666
NSN 4140-00-011-9444
NSN 6130-01-344-8395