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 5835-01-158-6878
NSN 5965-01-621-6012
NSN 6145-00-485-6812
NSN 7035-00-188-6674
NSN 2925-01-346-9522
NSN 6685-01-319-8195
NSN 6220-01-184-7327
NSN 5960-00-661-0477
NSN 5920-01-591-4064
NSN 5895-00-387-4901
NSN 6645-01-133-0323
NSN 5930-01-394-4740