huangyhg

tolerance for 4mm a/f hex socket
hi i am new to this site and was wondering if any body knew the tolerance for a 4mm a/f hex broached hole. the drawing just asks for 4.07 a/f but no tolerance, i know the information is available in the machinist/engineers hand book but i do not presently own a copy, any help on this question would be much appreciated.
hi,
i don't have a perfect answer for your question, however i could find some info that seemed to be somewhat close. in "ansi b4.2-1984 prefered hole basis metric fits" it says that h8/f7 (close running) fit tolerances for a 4mm hole are 4.000-4.018. hope that helps.
hi gpavlab, thanks for taking the time to reply to my question. i think you you misunderstood my question i am broaching 4mm hex holes and wanted to know the tolerance across the flats of the hex hole. i managed to get the information from a photo copy of bsi handbook 44. just so you can sleep easy the sizes were 4.02/4.095 thanks again jp
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