I need to retap something up to the next closest american thread. It was threaded 3 mm. Would that be a 4-40? Thanks, Ron
Next tap size up from 3mm
Dec 22, 2005
4 Replies
3mm is .118". A #5 screw is .125". Randy
Do they make a #5 tap? Would it be hard to find a #5 set screw? Ron
Note that a #8 is the smallest size that will have a core diameter greater than 3mm. This could make for a better thread.
Mark Rand RTFM
Unless he uses a form tap. 6-32 or 6-40 would be doable. Perhaps an insert could be used. IIRC, the drill size for a 4-40 STItap is right close to 3mm.
michael
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