NINGBO BONRIO IMPORT & EXPORT CO., LTD. is an exporting company whom has own manufactory. We have long terms business relationship with China National Testing Center ( the lab has ISO17025 Cert. & NADCAP certification for material testing ).
The commonly used bolt locking structure can be divided into detachable anti loose structure and permanent anti loose structure.
Note: if there is no standard screw and it belongs to non-standard part, it needs to provide drawings.
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