This is a 620 piece, class 8.8, zinc plated steel hex cap screw, hex nut, flat and lock washer assortment. It comes in a steel box that is clearly labled and has a removeable plastic tray, hinged lid and latch. It includes the following sizes: M5x16, M5x20, M5x30, M6x16, M6 x20, M6 x30, M8x16, M8 x25, M8 x40, M10x20, M10x35, M10 x40 (occasionally reasonable substitutes may be used to ensure timely delivery) and corresponding nuts and washers. These sizes are all commonly found in the automotive, industrial, power equipment and many other fields.
 
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