b&m-TRIMNUT®

Thread-forming nut

The b&m-TRIMNUT® turns the thread-forming principle upside down. In this case, it is not the screw but the nut that is both the fastener and the thread-forming tool. Designed to remove weld spatter on welding studs or coating residues, the b&m-TRIMNUT® is also capable of forming a thread in conjunction with a corresponding bolt geometry.

The b&m-TRIMNUT® enables the removal of imperfections by locally reshaping the damaged thread turns and it also removes rust and debris. This operating principle is effective during screwing and unscrewing and it ensures safe assembly and disassembly without destroying the connection.

  • Diameter: M5 – M22
  • Height: similar to DIN 1661
  • Property class: similar to 10 according to DIN EN ISO 898-2
  • Flank angle: 60°
  • Thread pitch: metric according to DIN 13 / fine thread or inch thread possible
  • Flange: geometry according to DIN 1661 / customer-specific solutions possible
  • Coating: according to specification (integrated or additionally applied lubricant depending on application)
  • Fastener and thread-forming tool in one
  • Compensates for imperfections by local reshaping of the damaged threads
  • Removes coating residue, rust, weld spatter and heavy debris
  • Easy applying of external threads using thread-forming
  • Higher strength than with machined threads - thus unrestricted force and torque transferability
  • Due to the high self-locking effect during thread-forming, no additional locking patch necessary
  • No "seizure" of the nut during assembly of damaged threads
  • Repeated screw connections are possible
  • No clamping effect when screwed onto a DIN/ISO bolt thread
  • Mounting onto KTL coated and hot dig galvanized threaded bolts
  • Applying external threads using thread-forming
  • Repair solution for damaged bolt threads
  • Battery holder: b&m-TRIMNUT® restores damaged threads.
  • Seat frame: b&m-TRIMNUT® connects centered components with "bare" bolts.