A nut having a sleeve portion on its under side, which can be crimped or clinched to hold the item in place when inserted in a hole.
NSN 5945-00-483-0652
NSN 6620-01-386-5914
NSN 5990-01-219-9018
NSN 6610-01-331-4174
NSN 6220-01-048-5584
NSN 5835-00-177-2970
NSN 5960-00-931-4215
NSN 5975-00-844-8413
NSN 6650-01-179-1842
NSN 6685-01-111-3120
NSN 5996-01-418-5140
NSN 5998-01-634-0604