It's easy to determine the size of a metric screw, just measure across the threads with a caliper. M3.5 is unlikely, because that size is not listed in bold print in the DIN list (as is M4.5, M7, M9, M14, M18 etc.). It is, AFAIK, only used in low current (<16 A) electric equipment such as wall outlets and switches, line plugs and connector strips and boards inside electric appliances. So, I don't believe M3.5 is much used for mechanical work. But clockmakers, violinmakers etc. all have their special threads, sometimes very old, that are not listed in the DIN tables. By the way: Also imperial threads are considered exotic over here just the same... ;-) Peter
Am 03.01.2016 23:43, schrieb Marcus Bowman: > M3.5 x 0.6 is also a size, as are M3 x 0.5 and M3 x 0.35. > If the diameter is a full 3mm, I would guess M3.5 x 0.6 because the OD across > the crests on a metric thread is always slightly smaller than the nominal OD. > It could also be 1/8 x 40TPI which is a commonly used thread on pendulum rods > (Model Engineer series) but that has a 55 degree Whitworth form with rounded > roots and crests. > > What are the measured OD and the pitch, and the flank angle? > > Marcus > > > On 3 Jan 2016, at 22:20, andy pugh wrote: > >> On 3 January 2016 at 19:50, joseph perry <[email protected]> wrote: >>> Almost looks like metric but I can't find an M3 x .6 My 2 cents >> M2.5 x 0.6 is a size. >> >> -- >> atp >> If you can't fix it, you don't own it. >> http://www.ifixit.com/Manifesto >> >> ------------------------------------------------------------------------------ >> _______________________________________________ >> Emc-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------------ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > --- Diese E-Mail wurde von Avast Antivirus-Software auf Viren geprüft. https://www.avast.com/antivirus ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
