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 6620-01-383-6494
NSN 2925-01-415-0264
NSN 5915-00-830-4927
NSN 6685-01-570-0800
NSN 5999-01-632-0044
NSN 6110-01-163-2953
NSN 5895-01-018-1246
NSN 6685-01-048-4682
NSN 6110-01-571-7020
NSN 5935-01-494-9661
NSN 7035-00-517-8232
NSN 6320-01-330-2138