Ultra-thin wearable devices and miniature sensors demand high precision micro screws. Strict machining standard and proper locking process reduce assembly defects such as thread slipping and head damage.
| Inspection Item | Tolerance Range | Assembly Influence |
| Thread Outer Diameter | Micron level error control | Thread meshing tightness and smoothness |
| Head Concentricity | Minimal deviation standard | Avoid shell damage caused by locking offset |
| Drive Groove Centering | Central position without shift | Ensure stable bit contact without slipping |
Nickel-plated carbon steel screws suit daily digital products for cost and hardness balance. Stainless steel micro parts apply to humid coastal environment for anti-rust performance.