A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5960-01-023-8800
NSN 6685-00-218-1229
NSN 5945-01-571-6997
NSN 6320-01-064-0372
NSN 5960-00-016-0372
NSN 5998-01-425-1510
NSN 5910-00-826-9192
NSN 5925-01-197-9899
NSN 6685-01-401-5360
NSN 5920-01-496-1309
NSN 5950-01-382-3392
NSN 6240-01-363-8258