Technical Description of productsInformation 11. Class of external threads and class of Dies ■ Example : M6X1 Class of external threads Class of Die 4h 6g P1 SP-D/HS-D 8g P2 Old JIS 1st Class Old JIS DPO S2 S5 2nd Class Old JIS 3rd Class D Ⅱ 0 -100 -200 0 -100 -200 (μm) (μm) Basic Pitch Diameter 5.350mm Basic Pitch Diameter 5.350mm Class of Die shows pitch diameter tolerance of Testpiece External Threads cut by the die. Dies type Class of die Application When the target is the middle of P2 the tolerance of Class 2 or 6g external thread SP-D / HS-D When the target is the minimum P1(Standards) limit size of Class 2 or 6g external thread S5(Standards) For Class 2 or 6g external thread DPO S2 For Class 1 or 4h external thread D Ⅱ For Class 2 or 6g external thread Technical-19