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LocTec®
Screw connection with safety drive

An ARNOLD fastener with the LocTec® locking drive cannot be removed by conventional means. Therefore no need for additional security devices. This means that there's no need for secondary steps to hammer in a steel ball or use shear-off fasteners.

No waste 
pieces

No additional 
work steps

No corrosion 
damage

LocTec®

The ARNOLD LocTec® screw is simply inserted using the LocTec® safely bit and then tightened. A secure fastening is formed. The LocTec®'s special flank geometry screw ensures that attempts to undo it (even with the LocTec® safety bit) will always result in the tool slipping out.

LocTec®
Unique tamper protection with outstanding properties

The market’s demands

  • Reduced assembly time 
  • Simplified assembly process 
  • Lower overall connection costs 
  • Reliable assembly 
  • Flexibility

ARNOLD provides the solution

LocTec®
Screw connection with safety drive

LocTec® Application Area

Technical advantages of LocTec®

  • Precise transmission of high torques
  • No waste pieces as with shear bolts
  • No additional work steps (such as drilling or gluing)
  • No additional securing measures
  • Same processing speed as with other screw connections
  • Automated assembly possible
  • No corrosion damage
     

Commercial advantages of LocTec®

  • Less effort required for assembly, storage, and scheduling 
  • Reduction in costs for safety screw connections 
  • Reliable protection against unscrewing

Animation
The LocTec® locking screw system from ARNOLD

LocTec® 
Non-destructive loosening? Not a chance!

An ARNOLD screw with LocTec® security drive cannot be loosened using conventional methods without taking additional security measures. This means you don't need to insert steel balls or use shear elements.

Screw in

Screw in

The LocTec® screw is simply screwed in and tightened using the LocTec® safety screw bit. This creates a secure connection. Non-destructive loosening is no longer possible. No further safety measures are required.

Attempt to solve

Attempt to solve

The special flank geometry of the LocTec® screw ensures that any attempt to loosen it, even with the LocTec® security screwdriver bit, will result in the assembly tool being unscrewed.

Everything you need.

Application-related and near-series testing
 

Find out more

Calculations and simulations for technical evaluation and optimization 

Find out more

  • Brochure LocTec®

    The secure screw connection
    PDF –     790 KB
    • Download

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