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 5945-01-630-1466
NSN 5930-01-348-7412
NSN 5895-00-080-2003
NSN 5975-01-189-9304
NSN 6105-00-377-8206
NSN 6650-01-031-9114
NSN 5835-00-827-1904
NSN 6650-00-922-3328
NSN 5990-01-473-4314
NSN 6620-01-212-4298
NSN 6150-00-968-9599
NSN 6145-00-398-4405