A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 2925-01-087-1677
NSN 6110-00-305-2838
NSN 5985-01-209-5990
NSN 5905-01-652-3073
NSN 6105-01-085-6002
NSN 6220-00-900-4439
NSN 6645-01-231-9891
NSN 6685-00-628-5305
NSN 5990-01-305-8121
NSN 5895-00-070-5527
NSN 6130-01-302-2820
NSN 5999-01-346-3434