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 5960-01-257-0225
NSN 6145-01-146-9980
NSN 6135-01-362-4256
NSN 6610-01-435-8982
NSN 6620-01-187-7267
NSN 5998-00-988-3111
NSN 6685-00-684-7891
NSN 5990-00-491-8628
NSN 5960-00-536-1535
NSN 4140-01-133-9011
NSN 6645-01-210-8180
NSN 6610-00-242-3160