A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5915-00-052-5906
NSN 6105-01-026-0165
NSN 5915-00-180-8186
NSN 6110-01-435-5441
NSN 5996-00-172-0224
NSN 5965-01-583-1507
NSN 5915-01-352-5150
NSN 5910-01-364-3599
NSN 5985-00-517-0274
NSN 5996-00-451-6096
NSN 5998-00-786-8120
NSN 5925-01-589-0212