The male threads on my AC cooler (99 Express 3500) are bunged up and I need to find a die that I can use to repair these threads. I've already tried O'Reilly and Car Quest and they only have a 5/8" size.
Anyone know where I can buy or rent a die that will repair these threads or even what size/pitch these are?
That looks like a male insert o-ring braze-on fitting. You *might* be able to heat that up and remove it, then braze on a new one. I went through a similar problem on my 98 Express 3500, but I had broken a connector completely off. I found new ones here: