Composition: Hexagon head screws acc. to ISO 4017 and hexagon nuts acc. to DIN 934 Steel class 8.8-l8l zinc plated Contents: M5x10 -x16 -x20 / M6x16 -x20 -x25 / M8x20 -x25 -x30 / M10x30 -x40 / M12x30 -x40 950 pieces