A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5996-01-418-5140
NSN 7035-01-040-6373
NSN 6150-01-113-8553
NSN 5950-00-357-1594
NSN 5905-00-419-3949
NSN 6145-01-051-9685
NSN 7035-00-919-3381
NSN 5925-01-127-6002
NSN 5905-00-336-5442
NSN 5960-01-143-1202
NSN 5945-01-494-8272
NSN 5910-00-518-4608