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Spark Plug Thread Chaser

$16.55/Each
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Part# 12-01683
MFR Model# 20200

Overview

Chaser cleans threads in spark plug hole of dirt, carbon build-up, and metal particles. Double ended for both 14mm and 18mm threads. Neoprene band on hex drive holds tool securely in any 13/16" deep-well spark plug socket. 1lbs shipping weight.
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Reviews

Cleaned the with easel.

Robert C Verified Purchase

Sprk Plg Thrd Chsr AtS20200

May 1, 2024

Havent had a chance to use it yet.

Joseph Verified Purchase

Sprk Plg Thrd Chsr AtS20200

August 22, 2023

Anvar S Verified Purchase

Sprk Plg Thrd Chsr AtS20200

March 17, 2023

Daniel E Verified Purchase

Sprk Plg Thrd Chsr AtS20200

December 2, 2022

No problem.

Kenneth L Verified Purchase

Sprk Plg Thrd Chsr AtS20200

September 26, 2022

Jerry J Verified Purchase

Sprk Plg Thrd Chsr AtS20200

July 23, 2021

Part arrived on time and was as was expected

Bill H
September 30, 2019

I had a 18 mm spark plug helicoil that had a tiny tip that broke off (fatigue failure I believe). I couldn’t get the spark plug to start threading no matter what I did. A fellow A & P had this item, I borrowed it & GENTLY chased the threads with it. Viola, spark plug threaded first try. I haven’t used the one I purchased yet but it is the same item my buddy bought. Works way better than the Champion spark plug chaser. Good for cleaning up threads but improperly used could also cross thread & damage them.

Gary S
February 18, 2018

I purchased this for cleaning the threads on a 3D printed spark plug caddy and it works fine for that and is much cheaper than an M18x1.5 tap. The description said it fit a 13/16 socket but it actually fits a 3/4 socket.

Joel U Verified Purchase

Sprk Plg Thrd Chsr AtS20200

February 4, 2023

It is a solid tool and priced right. Performs as expected.

Paul B
April 21, 2018

Q&A

Please note, Aircraft Spruce Canada'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 Canada 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: I am curious about what happens to the debris that this tool removes from the threads? On the bottom plug threads, gravity would help keep it from falling into the cylinder but the top seems as if the debris would fall inside pretty easily. What method is or can be used to keep this from happening?

The ATS 20200 Thread Chaser is intended to straighten out deformed threads without cutting. The "without cutting" part is very important as this tool is not a tap -- it is not intended to cut metal, but to reshape the threads and clean out residue such as carbon and dirt. The usual technique is to cover the threads of the tool with a layer of grease prior to using it so that the grease will capture the dirt and debris as it cleans up the threads.

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