Thread callout (hole callout)

Hi guys

I customer wants to use the thread feature for exterior threads.

Attached you can find one of the "special" thread which are dimensioned with hole callout.

Is there a way to fix that problem? NX inteprets the / as a fraction.

2-1/4-4_1/2UNC from thd_english.dat

is there a symbol for / I can use so that NX does not use it for a fraction symbol?

Thank you