SparkPlugs.com: Finding and Comparing Part Specifications
Amazon.com: OEMTOOLS 25226 Standard Ignition Spark Plug Gauge | Measure & Set Spark Plug Gaps from 0.025 In. (0.640 mm) to 0.045 In. (1.140 mm) | Gauge with Wire Sizes in Inches & Millimeter | Electrode Adjuster : Automotive
Champion Spark Plugs - REM37BY | Aircraft Spruce
EON8/286 CHAMPION Igniter Industrial, with gasket seat Spark Plug M12x1,25, Spanner size: 14 mm
Lisle 67800 Standard Spark Plug Gap Tool 083045678700
Spark Plug, NGK CM6, from Chief Aircraft, ca-ngk-cm6 - Chief Aircraft Inc.