This product is the ideal solution against bolt-loosening by shaking and vibration on the equipment.
Hexagonal outline form can be tightened with a pneumatic-wrench, hydraulic-wrech, hammering wrench or by a hand-wrench.It is because every press-screw is pre-tightened in advance.This nut cannot get loosened by itself until you try to loosen the press-screws.
Bolt-Engineer Co, Kobe, Japan
(Post code 651-2404) 255-6, Furusato, Iwaoka-Cho, Nishi-Ku, Kobe, Japan