Plug size for slave cylinder align

I have a 91 1/2 silverado with 5 speed manual. Recently had to put a clutch slave in, the align plug was cross threaded. I had to cut it out. I now need to replace it. I think it's metric. About 23mm. Does anyone know for sure and where I might get one or something that will work. Been to the parts houses and they can't get anything. Salvage around here don't have that I have found. Thanks for any help.

I have a 91 1/2 silverado with 5 speed manual. Recently had to put a clutch slave in, the align plug was cross threaded. I had to cut it out. I now need to replace it. I think it's metric. About 23mm. Does anyone know for sure and where I might get one or something that will work. Been to the parts houses and they can't get anything. Salvage around here don't have that I have found. Thanks for any help.

internet salvage parts.