| 氮化层深度：0.5-0.8mm | Depth of nitration case :0.5-0.8mm |
| 氮化硬度：950-1020Hv | Hardness of nitration:950-1020Hv |
| 氮化脆度：<=一级 | Fragility of nitration :Less than grade |
| 表面粗糙度：Ra0.4um | Roughness of the surface : Ra0.4um |
| 螺杆直线度：0.015mm | Linearity of the screw :0.015mm |
| 氮化后表面镀硬铬硬度：>=950Hv | The surface hard chromium plating hardness after nitrogenation:>=950 Hv |
| 镀铬层厚度：0.03-0.08mm | charome-plating layer thickness :0.03-0.08mm |
