Direct screwing system with integrated sealing function for aluminum-steel hybrid applications
In contrast to „trilobular“ screws, the b&m-TIGHT® is designed with a circular cross-section affecting the entire threaded area. The forming zone is also provided with fully and sharply pointed thread flanks.
The b&m-TIGHT® is suitable for assemblies in aluminum-steel hybrid applications.
Special characteristic: when the core hole is adjusted, the b&m-TIGHT® is self-sealing against gases and liquids.
Product features
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
Benefits
Universal application for direct screwing of materials from high-strength steel to tough-soft aluminum
Circular thread cross section and fully pronounced thread flanks offer maximum flank coverage and through this a high overtorque
The forming zone geometry provides a positioning effect and compensates for axial deviations when the screw is applied
Enables screw-in depths of up to 5 x D (D= thread diameter) in low-strength materials
Self-sealing thread for reliable sealing for under or over pressure of up to 1000mbar (according to MBN 10355)
Prevents corrosion by keeping moisture away from the exposed connection point
Areas of use
Especially suitable for aluminum-steel hybrid applications
Direct screwing in high-strength and tough materials, as well as die-cast aluminum
Applications where a sealing function is required
Project examples
Transmission frame connection with steel tubes
Seat connection with a hybrid screw connection made of aluminum-steel
Tank strap connection with a hybrid screw connection made of aluminum-steel
