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The external hex drive allows high torque transmission, but can fail quickly due to weaknesses inherent in its design.

External TORX PLUS low-profile head drive system is engineered to provide optimal torque transfer and extended tool life, with a head height similar to hex or pan head fasteners.

Fast Facts:

  • Hex flange head or pan head bearing surface
  • 0° drive angle
  • Lobe engagement spreads forces over large area to prevent stress risers that cause tool and fastener damage
  • Higher torque transfer capability than corresponding internal recesses
  • Drive system strength 5 to 6 times greater than normal seating torque
  • Head height is similar to hex or pan head screws or bolts
  • Lower head volume (weight) than hex and pan head fasteners (18% and 41% respectively)

Benefits:

  • Provides high strength and torque capability in a low-profile head
  • Ensures optimal torque transmission and clamp load
  • Allows high torque transfer without damage to fastener
  • Minimizes space required to accommodate head height
  • Excellent high-torque drive system for miniature fasteners
  • Reduces wear on drive tools for extended tool life

Design Guidelines:

  • Fastener Sizes: M0.6 to M24 (#0000 to 1")
  • Head Styles: Dome or indented head with hex flange or pan head bearing surface
  • Thread Styles: Can be used with any thread style
  • Note: Special sockets are required

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The availability of the products described on this site, and the product descriptions, may vary from country to country. Consult your STANLEY Engineered Fastening Account Executive or your local distributor for specific product information.