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Been looking for a COTs carbide/ HSS cutting tool for milling standard 37 deg flare fluid ports, but am struggling to find anything applicable. Since these are common enough fluid fittings, I figure there has to be something out there.

Does anyone know what this type of tool would be called?

Acceptable specs are either J1926-1 (flare, NOT SAE o-ring boss) or AS5202. Specifically I'm looking for size -4, 37 deg female AN.

Essentially, I'm interested in a tool that can be used to machine a feature into a part that is similar to this (see photo) in a single in-and-out operation. Thread tapping would happen separately.

Before anyone suggests an adapter... it HAS to be this size and it HAS to be a milled port. So milling an NPT port and installing an adapter unfortunately does not work

enter image description here

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  • $\begingroup$ Before anyone suggests an adapter... it HAS to be this size and it HAS to be a milled port. So milling an NPT port and installing an adapter unfortunately does not work $\endgroup$ Jun 9, 2022 at 0:19
  • $\begingroup$ please add that info to your question ... it does not belong in a comment $\endgroup$
    – jsotola
    Jun 9, 2022 at 0:37
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    $\begingroup$ I’m voting to close this question because it is a shopping question. $\endgroup$
    – Solar Mike
    Jun 9, 2022 at 4:39
  • $\begingroup$ @SolarMike: Why? If someone knows the answer, and it helps me, and doesn't affect anybody else why delete? It is a genuine engineering question because I don't know how these ports are traditionally machined in a mass-manufacturing setting. $\endgroup$ Jun 10, 2022 at 1:06
  • $\begingroup$ Tn a traditional setting, they are made of 2 parts. The nut spins separately from the flare. There is a pressing (or rolling) deformation step involved to make the flare. A mill may not be the tool you seek $\endgroup$
    – Abel
    Jun 10, 2022 at 1:19

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