A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 6150-01-451-3363
NSN 6240-00-372-4841
NSN 6135-00-100-8890
NSN 5990-01-020-6841
NSN 6150-01-100-3880
NSN 5910-01-502-4566
NSN 5999-00-038-7756
NSN 6240-00-006-3725
NSN 6105-01-362-3033
NSN 6685-01-024-8986
NSN 5975-01-227-4441
NSN 5975-01-524-3603