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 6135-01-558-4194
NSN 6645-01-271-7583
NSN 6105-01-021-3565
NSN 5930-00-286-4669
NSN 7035-01-337-8128
NSN 5920-01-200-9318
NSN 6320-01-386-9104
NSN 4140-01-407-3287
NSN 7035-00-834-2090
NSN 6650-01-227-9634
NSN 5920-01-365-5151
NSN 5905-01-218-7357