As discussed in ALMA Memo 278, flat and anti-cocking waveguide flanges are preferred over the common Mil-F-3922/67B (UG-387 and -383) type of flange with its central boss. While flat and anti-cocking flanges are in many ways similar to the /67B flange, there are important differences in drilling, counterboring, and pin insertion details if these flanges are to be compatible with one another and with the /67B standard.
View a pdf version of ALMA Memo #444.
Last modified: 2003-01-27
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