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 6240-01-530-6540
NSN 5835-01-250-2939
NSN 5965-00-139-4870
NSN 2925-01-556-0333
NSN 5960-01-271-8107
NSN 6135-01-031-3032
NSN 5910-00-399-0734
NSN 5835-01-511-2072
NSN 2925-00-163-9016
NSN 5999-00-643-9218
NSN 5965-01-607-5753
NSN 6105-01-545-1485