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 5985-01-462-9214
NSN 5930-01-102-2773
NSN 6145-01-623-8460
NSN 6150-01-237-3291
NSN 5975-01-420-0404
NSN 6320-01-466-4175
NSN 2925-01-183-2897
NSN 5925-00-633-6236
NSN 5855-01-549-3666
NSN 5975-01-592-3231
NSN 5945-00-619-3553
NSN 5895-00-254-5001