A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 6645-00-218-6354
NSN 5945-01-378-7268
NSN 6150-01-554-5700
NSN 6645-01-471-2103
NSN 6130-00-352-2317
NSN 5996-01-437-0986
NSN 7035-00-205-8739
NSN 6645-00-177-4729
NSN 5925-01-634-0664
NSN 5990-01-245-7299
NSN 5998-01-414-6974
NSN 5950-01-414-8706