The b&m-TRIMNUT® turns the thread forming principle upside down. Not the screw, but the nut is the fastener and simultaneously a thread-forming tool. Designed to remove welding spatters on welding pins or plating residue, the b&m-TRIMNUT® is also able to form a thread in conjunction with a pin geometry designed for this purpose. The b&m-TRIMNUT® enables the removal of impact points by local reshaping of the damaged thread, as well as the removal of rust and the heaviest soiling. The functional principle works for screwing and unscrewing and ensures safe assembly / disassembly without destructive separation of the connection.