1. High precision with 0.01 mm tolerance
2. material cr12mov
3.hardness 58-64
4.grade 10.9
5. it is a tool for processing external threads
6.The thread adopts the needle rolling manufacturing process or the grinding process
7.Vacuum quenching is used for heat treatment
8.Suitable for machining high precision and high strength thread of standard parts
9.it has high elasticity ,wear resistance, compressive strength,good toughness,good self-lubrication,low friction confficient, long lasting and stable use