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Unknown thread standard (italian coffee machine)
Hello everyone!
I restore vintage espresso machines and right now I have one machine with really strange threads, which are used on pipe connections. The machine was manufactured in Italy in the 50s. Here are some examples: TPI 20 diameter 14.9mm = 0.5866" TPI 20 diameter 19.25mm = 0.7578" TPI 16 diameter 20.25mm = 0.7972" TPI 16 diameter 22.8mm = 0.8976" TPI 16 diameter 27.7mm = 1.0905" Does anyone know what kind of threads it might be? Many thanks, Julius |
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