b&m-TIGHT®

Direct screwing system with integrated sealing function for aluminum-steel hybrid applications

In contrast to "trilobular" screws, the b&m-TIGHT® is equipped with a circular cross section in the entire thread area. Through this the thread-forming zone is also provided with complete and pointedly pronounced thread flanks. It is suitable for constructions in aluminum-steel hybrid applications. In addition, when the core hole is adjusted accordingly, the b&m-TIGHT® is self-sealing against gases and liquids.

  • Diameter: M8 - M14
  • Length: depending on diameter / 20mm – 140mm
  • Property class: 10.9 according to DIN EN ISO 898-1 + inductive hardened thread-forming zone (6 -8 threads)
  • Flank angle: 60°
  • Thread pitch: metric according to DIN 13
  • Head geometry: customized solutions available
  • Coating: optional according to specification (integrated or additionally applied lubricant according to application)
  • Thread-forming zone: 3 - 4 threads
  • Universally applicable direct screw connection for materials from high-strength steel to tough-soft aluminum
  • Circular cross section and complete thread flanks offer a maximum flank overlapping and through this a high over torque.
  • High process capability through stable screw-in parameters
  • Thread-forming zone geometry provides for a positioning effect and compensates for axial deviations when fitting the screw joint
  • Through the high self-locking effect, no need for additional locking patches
  • Great process window feasible between tapping torque and overtorque
  • Enables screw-in depths of up to 5 x D with low-strength materials
  • Self-sealing thread for reliable sealing up to a vacuum or overpressure of 1000mbar (according to MBN 10355)
  • Preventing corrosion by keeping moisture away at the unprotected connection point
  • Produces an uninterrupted fiber flow and a thread with high load-bearing capacity by solidification of the material
  • Especially suitable for aluminum-steel hybrid applications
  • Direct screw connection in high-strength and tough materials, as well as die-cast aluminum
  • Applications where a sealing function is required
  • Project: Transmission frame connection (steel tubes)
  • Project: Seat connection (hybrid screw connection aluminum-steel)
  • Project: Tank strap connection (hybrid screw connection aluminum-steel)