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 5935-01-394-4968
NSN 6150-00-015-6150
NSN 6135-01-036-3495
NSN 5925-01-450-5348
NSN 5960-00-692-2887
NSN 2925-00-495-8130
NSN 6145-00-548-0946
NSN 5998-01-148-0058
NSN 6150-01-268-7150
NSN 5895-00-879-4895
NSN 5895-01-445-6690
NSN 5975-01-198-9801