Please confirm the RHM38S 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, Single Fine Wire Electrode, Iridium. 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.

ACA-401B Aileron Ag-Cat Aircraft Cable, Grumman G-164A | McFarlane Aviation ACA401B
ACA-7B Aileron Ag-Cat Aircraft Cable, Grumman G-164B | McFarlane Aviation ACA7B
AA4A5 Specialty Tires of America Aero Classic Aircraft Tire | 8.00 X 260, 6 Ply, TT (Tube Type) 