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 6650-01-588-8486
NSN 6685-00-491-1101
NSN 6240-00-900-7674
NSN 5985-01-455-0942
NSN 6320-01-157-9076
NSN 6130-01-367-2201
NSN 5975-01-239-4207
NSN 5950-01-262-9647
NSN 6110-00-136-2619
NSN 5935-01-561-3241
NSN 5835-01-307-8954
NSN 5998-01-200-9831