I'm making an adaptor for a DDTI the thread sizes was supposed to be 2.5mm after much cursing and searching to find size variants seems there are a few. I discover these are NF #4-48. My problem now is locating a die to cut the new thread.

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In all material/books I have, no mention of #4-48 only place I found it was on my Suttons wall chart and on this plastic gauge son gave me.
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