A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5905-01-317-4313
NSN 6220-01-564-6376
NSN 5855-00-481-0019
NSN 5835-01-416-6455
NSN 6645-01-375-8176
NSN 5996-00-194-8303
NSN 2925-01-389-6874
NSN 6145-01-604-1088
NSN 6610-00-110-6942
NSN 5950-01-094-7984
NSN 5895-01-011-3801
NSN 5910-01-633-9963