A nut with projection(s) that is/are designed to localize heating, during welding, at predetermined points and to fuse with the metal to which the nut is mounted.
NSN 5835-01-457-5630
NSN 6610-01-554-8225
NSN 5915-01-503-8267
NSN 6110-00-819-0574
NSN 5915-00-599-9162
NSN 5925-00-760-2622
NSN 7035-01-372-5006
NSN 5999-00-599-1705
NSN 4140-00-804-0561
NSN 6240-01-447-2838
NSN 5990-01-221-0609
NSN 5925-01-133-7246