A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5835-00-264-0946
NSN 5915-00-269-4463
NSN 5835-00-231-9544
NSN 5950-00-269-2698
NSN 5905-01-532-5039
NSN 5925-00-504-5364
NSN 5915-01-559-7449
NSN 5996-00-406-4951
NSN 5895-01-272-8881
NSN 6610-00-273-9019
NSN 6130-01-525-7519
NSN 5920-01-416-0616