I need a spark plug for an undisclosed application, with a 10mm thread, as long of a reach as possible, and no resistor. That's it. However, I have found out that spark plug part numbers are meaningless, and manufacturers only catalog them by the application, like by the actual car that uses it. I can't find any way to look up spark plugs by their actual physical characteristics. Does anyone happen to know a spark plug that fits this description?