Bristol Spline Wrench Set (For Radio Knobs)

Bristol Spline Wrench Set (For Radio Knobs)

The Bristol Spline Wrench looks a bit like a hex wrench or allen key at first glance, but it is not.  The Splines on the Bristol wrench ensure maximum force is applied to rotation, not expanding the fastener.  Using the incorrect tool on the small grub screws in aircraft radios will cause damage that costs much much more to put right than this set of wrenches would have cost in the first place.

This set will work for most avionics knobs and controls.  Please remember to check if it's a Hex or a Spline grub screw.  Use a suitable magnifier to look at the end of the screw, identify the correct tool from the picture below.  If it's a Hex you need the HS-206 set.

Set comprises:

• S-033-4
• S-048-4
• S-048-6
• S-060-6
• S-069-4
• S-072-6
• S-076-4
• S-096-6
• S-111-6

Hex Key	Bristol Spline

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