A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 4140-00-940-9595
NSN 6135-01-056-4609
NSN 6685-01-473-0546
NSN 2925-00-767-4245
NSN 6240-01-423-6771
NSN 6645-01-122-9430
NSN 5925-00-258-7128
NSN 5855-00-933-9978
NSN 6130-00-512-7135
NSN 5975-01-500-2227
NSN 5855-01-211-2437
NSN 5950-00-959-8899