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 5965-01-589-3968
NSN 5996-01-094-6999
NSN 6240-01-606-1850
NSN 2925-01-148-7646
NSN 2925-01-595-9720
NSN 6130-01-345-4477
NSN 5996-01-290-0988
NSN 5990-01-433-3786
NSN 5960-01-317-3800
NSN 6645-00-510-6643
NSN 5905-01-634-0595
NSN 6220-00-419-6152