A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5910-01-010-2911
NSN 5925-01-502-5621
NSN 5895-01-461-8287
NSN 5965-01-507-4318
NSN 6650-01-255-7996
NSN 5965-01-106-4969
NSN 6650-01-173-5651
NSN 5985-00-009-4685
NSN 6145-01-564-2556
NSN 6150-01-469-3089
NSN 5975-00-260-1336
NSN 6320-01-253-9585