Called washer
No other part numbers with same form, fit, and function found.
A washer which is usually round with a centrally located hole. Its edges and two bearing surfaces are so designed that applied pressure brings into play the spring tension and/or frictional locking principle which materially resists any tendency toward turning. It may be made of one or two pieces
NSN 6220-01-279-0527
NSN 6320-00-070-4544
NSN 6130-01-396-6197
NSN 5905-01-622-6060
NSN 7035-01-100-2796
NSN 5960-00-859-5059
NSN 6110-01-467-9074
NSN 6105-01-588-2837
NSN 6130-00-102-4521
NSN 5910-01-413-7915
NSN 6620-01-149-9192
NSN 5998-01-068-3559