A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5985-01-407-4688
NSN 5999-01-318-8393
NSN 6135-01-573-7164
NSN 5855-01-541-8659
NSN 5985-01-090-1100
NSN 5996-01-551-1907
NSN 2925-01-577-0004
NSN 5965-01-246-6162
NSN 5855-01-283-0050
NSN 5999-00-285-2987
NSN 5985-01-025-9711
NSN 5920-01-424-1708