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 6150-00-806-9397
NSN 5975-00-453-3263
NSN 5996-00-089-8383
NSN 5996-01-488-8420
NSN 5920-00-939-5442
NSN 6150-01-185-1104
NSN 6220-00-988-1562
NSN 6150-00-728-5972
NSN 5975-00-673-7658
NSN 6645-01-120-7135
NSN 5925-00-972-3000
NSN 5935-01-058-5078