A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5990-01-212-2037
NSN 5930-00-595-5489
NSN 5925-01-409-2616
NSN 5965-01-201-8399
NSN 6150-01-172-9099
NSN 7035-00-104-7613
NSN 5910-01-464-1482
NSN 5965-01-501-5638
NSN 5920-01-391-5666
NSN 5835-00-764-4388
NSN 5910-01-137-1608
NSN 6130-00-951-9845