Boss on small diameter 0.125 in. Long
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 6610-01-391-6781
NSN 6130-00-949-9994
NSN 6645-01-423-4617
NSN 5910-00-090-3779
NSN 6220-00-149-0977
NSN 5960-01-487-6436
NSN 6320-01-630-7629
NSN 5905-00-173-5228
NSN 6135-01-294-2131
NSN 2925-01-154-2949
NSN 5999-01-290-0194
NSN 6685-01-041-0582