Sizes: M8 x 16/20/25/30/35mm/M6 x 12/16/20/25/30mm Flanged Hex Head Bolts and serrated flange lock nuts.
Flange Design: there have a flange on the flange nuts, which distributes the load like a spring washer; And serred flange make it screw firmly.
High Quality: these bolts set are made of good A2-70 stainless steel 18-8 (304) material, featuring with higher hardness & great tensile strength, offering corrosion resistance even in severe surroundings.