Industrial I-31-1 Spark Plug

AUBURN I-31-1 Spark Plug is an industrial burner igniter that provides the ignition spark for natural gas or LP burners in commercial equipment. This 14 mm thread plug uses a flat-seat design with a single copper center electrode measuring 1.67 inches and an overall length of 3.96 inches; the hex across flats is 13/16 inch, and the thread height is 14 mm x 1.25 mm. The I-31-1 configuration features one electrode and copper construction to support reliable spark delivery in typical burner ignition assemblies. Common applications include igniting burners in industrial equipment such as grain-drying systems and other commercial furnaces that rely on spark ignition. As an Auburn-branded replacement, this I-31-1 model is intended for installation in compatible Auburn ignition systems that specify the I-31-1 designation, helping ensure proper fit within standard Auburn installation envelopes.