The Kromschröder KS34483591 is a genuine threaded ignition spark plug (M18 x 1.5 thread, 50mm overall length) used for direct spark ignition on industrial gas burners and gas engines. It carries the engraved marking "ZE 18-12-50" and "Germany" on the hex body, with a ceramic insulator and a top-mounted threaded stud terminal for the ignition cable connection. Manufactured by Honeywell Kromschröder, Germany, and supplied by R.K. Instruments & Controls.
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