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 6150-00-335-7189
NSN 6685-01-293-1267
NSN 5925-00-763-8079
NSN 6645-01-431-4545
NSN 5930-01-174-3467
NSN 5910-00-849-2991
NSN 6320-00-036-3688
NSN 5915-01-017-0214
NSN 5930-01-317-9349
NSN 5920-01-547-5196
NSN 5895-01-658-8641
NSN 6110-01-153-2290