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External reasons for the locking phenomenon of stainless steel fasteners
1. If the product is not selected correctly, it is necessary to confirm whether the mechanical properties of the product can meet the needs of use before use. In addition, the length of the screw should be selected appropriately, based on the one or two pitches of the exposed nut after tightening.
2. Rough tooth pattern or foreign matter. If there are welding spots and other metal shavings are caught between the tooth patterns, it will often lead to lockup. (Guide: Inspection requirements for dimensions and other requirements of fasteners after plating)
3. Use a torque wrench or a socket wrench as much as possible if you use too much force or the locking speed is too fast, and avoid using adjustable wrenches or electric wrenches, because electric wrenches often cause the locking speed to be too fast, and the temperature rises rapidly and locks up.
4. The direction of force is wrong and the nut must be screwed perpendicular to the axis of the screw, and do not tilt.
5. The use of unused flat and elastic washers can effectively prevent the problem of over-locking.
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