screw head for injection

Technical parameter

 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 Cr-coating Layer:      ≥950Hv   

 Thickness of Cr-coated Layer:      0.03-0.08m

 guarantee time    :                             one year under normal using

    We can do all types of screws and barrel according to your requirements.

    If you have any questions of our products, please contact with us.