Chang Jo Metal Ltd

Subject : Innovative Never-Loose Self-Tightening Lock Nuts Dear Sir/Lady, We are Korean manufacturer of Nuts. Mostly, nuts and bolts get loose if they impacted by the constant long-lasting strong vibrations, which can drive to mechanical breakdown also put human lives danger. Our ...

Telephone：82 - 2 - 9498158Address：685-20, Sungsu 1-Ga, Sungdong-ku Seoul 120-134 Korea