So I finally located these 14 x 1.25 Jam nuts through a tractor supply outlet. A mild steel nut that a sparkplug threads into. If you don't yet understand why a highly-suggestible idiot redneck goofball turd like me is interested in deez nutz, they play a pivotal role in my follow-up post: "How to set up a FlameThrower exhaust on your Moped."