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 6685-00-663-9000
NSN 5965-00-078-7615
NSN 5999-01-240-5471
NSN 5965-01-019-0939
NSN 6145-00-500-5679
NSN 5920-01-158-4517
NSN 5910-01-627-6883
NSN 6110-00-244-1354
NSN 5960-00-091-8729
NSN 6220-00-846-3586
NSN 6610-00-686-5817
NSN 5990-00-991-8723