Ningbo Zhenhai Jinyi Mechanical and Electrical Co.,Ltd [China]

Depth of Nitrated Layer: 0.5-0.8mm             Hardness of nitration: 900-1020Hv
Fragility of nitration: Less than grade 1        Surface roughness: Ra 0.4um 
Hardness of Bimetallic Layer: HRC55-72       Depth of Bimetallic Layer: >2mm

We supply various types of conical screw barrel ,if you have any inquiry,do not hesitate to inform us.