A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 6220-01-235-8413
NSN 5920-01-485-3280
NSN 6320-00-371-8335
NSN 5985-01-508-3988
NSN 7035-00-513-9764
NSN 5999-00-394-7191
NSN 5915-00-442-2183
NSN 5998-01-056-5268
NSN 6130-00-904-4770
NSN 7035-01-071-5214
NSN 6110-01-648-6790
NSN 5950-01-456-7300