... close diameter tolerance +.0002/-.000. Common fractional sizes are available M-2 high speed steel 60-62 Rockwell C. Custom sizes can ... RC 64-65 and triple drawn available on request. TYPEOversizeMATERIALHSS M-2, SKH-9, SKD11,ASP23,ASP30etc STARDANDDIN AISI JISDIA. TOLERANCE0.0002 ... you produced3,The products size ,for example:M2.0,D 14*25.4,The surface coating type ,for example:Tin,Ticn5 ...