A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5960-01-197-4461
NSN 5910-01-115-0200
NSN 5999-01-378-8483
NSN 6150-01-609-3438
NSN 5945-00-226-8560
NSN 6110-00-271-9928
NSN 5855-00-797-8217
NSN 2925-01-656-8217
NSN 5965-00-007-7863
NSN 5999-00-491-3186
NSN 5950-01-068-4470
NSN 5895-01-420-8263