Does not fit available US threads. Based on other comments on similar products, it appears to be BSP (British Pipe Thread) which is not the same as US threads (PT/NPS and BSP threads are not compatible due to different thread forms, not just the fact that most diameter sizes have a different pitch NPT/NPS threads have a 60° included angle and flattened tops and bottoms (this is a form of Sellers thread), BSP threads have a 55° included angle and rounded Top and Bottoms (this is a form of Whitworth update your description and stop selling in the US.
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