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 6685-00-763-1080
NSN 5998-00-912-5782
NSN 5935-01-521-1586
NSN 5985-01-465-5001
NSN 5915-00-534-5391
NSN 5945-01-634-0588
NSN 5950-00-299-7851
NSN 5960-01-595-6515
NSN 5920-01-222-5107
NSN 6240-00-146-9322
NSN 2925-01-444-6676
NSN 5996-00-301-5243