A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 6645-00-964-3020
NSN 5975-01-392-8472
NSN 5985-00-218-1095
NSN 4140-01-389-6444
NSN 6610-01-567-3026
NSN 6130-01-431-6767
NSN 2925-00-994-8684
NSN 5910-01-354-6601
NSN 6240-00-850-4280
NSN 5985-00-541-7714
NSN 5855-00-548-4742
NSN 6610-01-326-0119