Compatibility is established only when the continuous operating and verification bands, internal aperture, waveguide designation, intended propagation mode and polarization agree with the complete path. Check cutoff margin and higher-order-mode risk through steps, bends, tapers and transitions. A catalog frequency overlap is a discovery clue, not proof of mode purity or installed electrical performance.
Compare controlled flange drawings, not labels alone. Verify aperture position and orientation, cover or choke form, locating pins, screw pattern, clocking datum, seal, face geometry and mating reference plane. Matching fastener holes can coexist with an offset aperture or a different alignment method. Reject any joint whose actual mating parts and orientation are not identified.
For a project check, provide both mating drawings, band and polarization, a path sketch and the required loss and return-loss planes. Inspect and measure a representative pair, then verify reflection and transmission after at least several disconnect/reconnect cycles with the path supported. If an adapter is required, include its loss, length, mode behavior and calibration treatment in the decision.