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Cylinder Base Nut Wrench Set

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Part# 12-02302


Where torque application accuracy is critical these tools meet the requirement. They offer excellent rigidity and surpass other wrenches in overall quality and efficiency.

Set includes wrench type A sizes 1/2", 9/16" and 5/8" hex nuts.
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  • 9/16" Hex - C-85, O-200, O-300, GO-300, E-185,E-225, 0& IO-470, IO-360, IO-520
  • 1/2" Hex - A-65, C-85, O-200, O-300, GO-300, E-185, E-225, IO-360
  • 5/8" Hex - A-65, O-470, IO-520


I order these based on the so called Over View. They do not meet what is said. I have a C85 with four new Millennium cylinder. The issue with the wrenches is the outside diameter around the socket end it to large to fit between the cylinder wall and the nut, so you can not get the socket over the flange nut. In addition, the outside diameter of each and itself varies and is not a consist diameter all around. I am returning the set I purchased. Buy a different type.

Keri-ann P
August 15, 2019


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Does this cylinder base nut wrench set include a 7/16 wrench?

No. This set of 3 wrenches includes: 1/2", 9/16", 5/8"

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