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HELI-COIL INSERTS

From $8.95 to $11.50
Description Part Number Price Buy
HELI-COIL INSERT 18MM X 13/16 "
08-13858
$11.50
Quantity
HELI-COIL INSERT 18MM X 1/2 "
08-13859
$8.95
Quantity
Subtotal $0.00
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Overview

18mm long Heli-Coil aviation grade spark plug inserts.

Reviews

The low reviews on this page come from not knowing how to insert the helicoil. The helicoil looks too big, but with a special tool, it is inserted into the cylinder with a bit of spring tension so that when you pull the tool out it is wedged in there.

Amos C
August 11, 2021

Fit perfectly. Understanding how the installation tool works is critical! I used a NAPA Balkamp 18-1.50mm spark plug thread repair kit P/N 770-3066.

Thomas S
April 20, 2021

Size .5mm off. Material possibly to thick. Could not use. Might work for non-aircraft use.

Songbird A
March 16, 2021

We ordered an 18 mm helicoil for a Lycoming engine. The Helicoil came in a bag labeled 18 mm but definitely was not 18 mm. it measured more than 20 mm on the ID. We had an additional 2 days down time on this engine while we procured the correct helicoil.

Bill H
September 30, 2019

Q&A

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: What material is this heli-coil insert made from? Is it brass?

Per Vendor: 08-13859 is made of stainless steel. Brass cannot be used on Aircraft Engines as the temperature would melt the brass in an Aircraft Engine.

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