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
NSN 6240-01-193-6545
NSN 6150-00-677-3176
NSN 6220-01-576-0077
NSN 6650-00-197-7563
NSN 6685-00-361-1798
NSN 6610-01-152-2821
NSN 6145-01-508-2218
NSN 5855-00-631-4565
NSN 5996-01-123-9038
NSN 6130-00-981-1600
NSN 6610-01-349-6333