A common problem with servicing spark plugs is carbon accumulation in the jug threads. Cleaning these threads regularly can save big money by preventing thread damage and the need to pull the jug and install thread inserts. This special designed tool works very well to limit this problem.
It provides maximum depth penetration and its unique spring action assures that there will be no enlargement of the existing thread pitch diameter.
The thread cleanout tool is for 18mm threads only.
This one works. I bought the cheaper one, it worked, I lost it. I know. I bought another cheaper one, it cross-threaded the spark plugs threads, which Im pretty sure is a bug, not a feature. So I sprang the extra $20 and got this, and it works perfectly. Im sure theres a lesson in there somewhere, but I will probably never learn it. See the research of Dunning-Kruger. I tremendously enjoy the breath-taking view from Mt Stupid.
Easy to use, worked as described. Nice tool to have to clean out old anti-seize build up
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.