ok

i make parts with solid works for machining purposes and for some reason evry time i put a thread in the drawing

for instance m33x2.0 and i send my drawing 2 the supplet sometimes the treaths fit sometimes they dont i cant see wat the reason is for this problem sins even when i ask for instance threats with callout for tolerance g6/g7 they stil come in wrong am i supposed 2 even call out the threats tolarance or is this a problem cause by the lathe or cnc were the part is made on

dus any 1 know a solution for this sins in my expierence if i say 33x2.0 it has 2 be this size