Special extension spanners can be manufactured when design or space limitations preclude the use of a dial measuring wrench and a standard nut socket. These allow access and enable you to apply torque in awkward spaces. 

To order a special extension spanner, the following information must be supplie. For assistance, please contact ASG at 216-486-6163 or asginfo@asg-jergens.com

  • Square drive size (A)
  • A/F size of spanner end (B)
  • End type - ring, open, flared (C)
  • Centered distance between the square drive and the spanner end fitting (E)
  • Maximum torque to be applied(T)
  • Fully dimensional drawing

Special extension spanners are not recommended for ADS 4 or ADS 8.

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Item #

Adaptor Model

Drive Type

N/A 16mm Spigot N/A 3/8"
N/A 16mm Spigot N/A 1/2"
N/A German 9x12 N/A 3/8"
N/A Cavity Fitting N/A 1/2"
N/A Wedge Fitting N/A 3/8"
N/A Wedge Fitting N/A 1/2"
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