Oh, I get it. He plugged the crossover tube holes in the burners with the 1/8" NPT fittings. OK, I though it was some kind of DIY crossover tube replacement.
I didnt take any pictures because that was a 11 hour day. I could if you need. The cross over holes are perfect size for a 1/8" NPT tapered tap and brass plugs. But its not easy tapping thin wall SS tubing and starting the plugs.