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Size comparison of pipes and pipe threads

【英】困ったときの知恵袋詳細
Cutting TapsRoll (Forming) TapsRound DiesThread Mills Related Products Pipe Threads Standard (Screw Threads, Center Holes)Basic Knowledge
What is a pipe tap PT 15A???
"15A" is the size defined for steel tubes for piping.
You will know the sizes of the correspondent pipe threads by looking at the sizes of the pipes. The size of the correspondent pipe threads of 15A pipe is PT1/2-14(Rc1/2-14).

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