I. Observation Method: Check the thread and groove condition.
Carefully examine the hexagonal grooves of the screw for deformation, wear, or chipping. If the originally clear hexagon becomes rounded or partially damaged, it indicates that the threads have begun to strip.
Check the screw threads for wear, breakage, or missing parts, especially the area in contact with the screw hole. Obvious damage may indicate stripping.
II. Tactile Judgment: Feel the change in resistance when tightening.
A normal screw will have a uniform resistance when tightening or loosening. If you find that:
The tool "slips" when tightening, unable to effectively move the screw;
It feels unusually easy, like spinning freely;
The screw cannot be further screwed in or out;
These are typical signs of stripping.
III. Sound Discrimination: Listen to the sound during tightening.
During normal operation, the screw and threads will produce a continuous, uniform friction sound.
If you hear a "clicking" or "slipping" sound, or a discontinuous sound, it may indicate poor contact between the tool and the groove, suggesting a risk of stripping.
IV. Comparison Method: Compare with a Normal Screw
Find an unused hex screw of the same specification for comparison, observing the groove shape, depth, and thread integrity.
If the screw under test is noticeably blurry, shallow, or asymmetrical, it can generally be determined that it is stripped.
V. Auxiliary Judgment Methods
Tool Compatibility Test: Try using a new, precisely sized hex wrench. If it still slips, it is more likely that the screw itself is damaged than the tool.
Torque Test: Apply the standard torque using a torque wrench. If it slips before reaching the set value, it indicates a connection failure and the possibility of stripped threads.
