Hi , i have a hemmens boiler i am refurbishing , 1 of the 1/4 x 40 bushes is not good it seems like someone has tried to start a larger threaded object in it ,so much so the top half of the bush is not able to hold a 1/4x40 fitting only the bottom last few threads which i would think unsafe in the boiler ,any help would be appreciated, regards Allan
