A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5895-00-923-6828
NSN 5950-00-175-6033
NSN 5920-01-197-0261
NSN 6645-00-145-6411
NSN 5920-01-442-3395
NSN 5910-01-110-9509
NSN 5905-00-589-9829
NSN 5855-01-147-4785
NSN 6240-01-343-0065
NSN 5985-00-950-7670
NSN 5835-00-170-5238
NSN 5925-00-520-5927