A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5965-01-012-1065
NSN 6220-01-368-6879
NSN 5915-01-165-3075
NSN 5996-01-106-7328
NSN 5925-01-437-4730
NSN 6610-00-075-5575
NSN 5930-00-683-9446
NSN 5990-00-059-8833
NSN 6240-01-182-5859
NSN 6130-00-358-4320
NSN 5975-01-009-8636
NSN 5835-00-624-1548