Manufacturers item name: anti-rotation washer
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 5920-01-445-8513
NSN 6685-01-547-5926
NSN 5910-01-506-0313
NSN 5965-00-904-5694
NSN 5996-01-029-9669
NSN 5910-01-054-3442
NSN 6105-00-099-8818
NSN 5930-01-571-1994
NSN 5990-01-411-4596
NSN 6145-01-142-2234
NSN 5925-00-983-0214
NSN 5910-00-148-0019