Spark Plug Deep Socket 1/2 Inch Drive

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Part# 12-00712
MFR Model# 429P88


T-557 1/2" drive without magnet

Note: Cannot be used with Tempest plugs. Use 12-01693 for Tempest plugs.
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Excellent service, prompt forwarding.

Guenther S
December 15, 2020

This is the tool for the job. My previous deep-well socket was about 3/16 shorter than this one and did not engage the entire surface of the plug - it would sometimes spin off and round the hex. This one engages deeply and is perfect. I do not find the absence of a magnet to be an issue.

Jeff R
November 16, 2017

Fits Champion spark pugs, works great

March 9, 2017


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: Looking for a spark plug socket for my Lycoming O320-B2B. Uses REM size spark plugs. What size socket to I need?

Both sizes (12-00710 and 12-00712) will work. The only difference between the two is the ratchet to be used to drive the socket. The 12-00710 requires a 3/8 inch ratchet drive, and the 12-00712 requires a 1/2 inch ratchet drive.

Q: Are these spark plug sockets size 7/8?

Yes, the socket size for 12-00712 and 12-00710 is 7/8.

Q: Will this socket fit Tempest fine wire plugs?

No, see part number 12-01693 for use with Tempest fine wire plugs.

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