Thread designation

[CoryPad]

Our customer is a global vehicle manufacturer. A drawing they provided to us for a splined shaft has three internally threaded holes on the end. The thread note says M14x1,5-2 (see attached image). I would like to know what the -2 represents. Usually that position in the thread designation is for the tolerance class, but there is no letter next to the -2 and there is no tolerance grade 2 in ISO 965-1. Thank you for any help you can provide.

 

[racookpe1978]

Odd. I did not find anything either in the on-line tables I opened.

But! There is a metric coarse thread M14-2 and the (expected) M14-1.5 fine thread.
Call the client back (politely of course) and request they clarify: It actually looks like they've called out both pitches - which makes no sense at all and will only create confusion.

 

[robyengIT]

Racookpe1978 is correct

tolerance grade : for internal thread 6H
for external thread 6g

What is strainge to me is the size : M14 is normally not so used

 

[CoryPad]

M14 is a common size used in the automotive industry.

 

[tbuelna]

Might be a misprint caused by a font compatibility issue. The "-2" is located where you often see the thread depth called out with a symbol and number.