Serrated safe spring washers solve the safety problem of bolt connections. Their exclusive performance is provided by their serrated surfaces. S series and VS series offer the best safety thanks to their less shaking. The smoothly chamfered serrated surface is evenly pressed on the interface of bolt connection and safely presses the connecting parts to prevent their relaxation. The deformation amount (H-S) of disc springs maintains certain pressure on nuts. The inside frication of serrated surface offers extra protection against relaxation.
    S series are of standard load, and the VS series are of medium load.
    Standard finished goods: spring steel, quenching and blackening treatment on the surface.
    They can also be made of stainless steel, phosphor bronze, and other surface treatments include galvanization or Ca plating.