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 4140-00-439-4100
NSN 5960-00-597-2680
NSN 5895-01-442-8198
NSN 5895-01-562-8591
NSN 6645-01-592-7862
NSN 6320-01-366-5157
NSN 5999-01-421-8596
NSN 6240-01-083-2431
NSN 6685-00-215-0557
NSN 5965-01-533-1374
NSN 7035-01-480-5537
NSN 5960-00-661-0477