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 6150-00-993-4696
NSN 6130-00-346-7833
NSN 4140-01-491-5080
NSN 5930-00-062-4733
NSN 5935-00-183-6478
NSN 6610-00-850-4910
NSN 6220-00-340-1313
NSN 6650-00-170-5095
NSN 6150-01-519-5402
NSN 6145-00-173-4850
NSN 5990-00-621-0572
NSN 6150-01-303-5852