A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5965-01-534-2818
NSN 6220-00-138-0589
NSN 5945-00-253-1323
NSN 6130-01-015-6458
NSN 6620-01-022-4104
NSN 5996-01-467-8128
NSN 5925-01-019-1254
NSN 2925-01-434-6945
NSN 6135-00-574-1204
NSN 6320-00-174-1362
NSN 5835-01-561-2959
NSN 6320-01-244-9268