Please confirm the RHM40E spark plug’s compatibility with your aircraft using these documents:
Product Details:
- Barrel Style: Shielded 3/4″-20 Thread
- Mounting Thread: 18 mm
- Reach: 1/2″
- Hex Size: 7/8″
Champion Spark Plug, Shielded, Standard Electrode, Two Prong. This Spark plug has 18MM Thread size and 3/4-20 Shielding Thread at Ignition Harness Connecting End.
Please note: Opened Plastic Spark Plug Packages are not returnable. Please confirm you have received the correct spark plugs for your application before opening package.

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