A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5855-01-532-7060
NSN 5999-00-872-3558
NSN 6130-00-662-8557
NSN 6150-00-851-5136
NSN 5965-01-484-0047
NSN 6145-01-357-9530
NSN 5960-01-142-1995
NSN 5835-01-177-1092
NSN 5920-01-492-6512
NSN 5996-00-253-7148
NSN 6610-01-165-3750
NSN 5998-01-351-1823