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 2925-00-890-3240
NSN 5930-00-887-6398
NSN 5855-01-325-9507
NSN 6145-01-323-6509
NSN 5960-01-386-3855
NSN 5960-01-314-1822
NSN 6105-00-407-0954
NSN 6240-00-264-9652
NSN 6685-00-165-5893
NSN 4140-01-661-0790
NSN 5930-01-170-4878
NSN 5996-00-413-0878