300pcs m3 black 10.9 grade button head hex socket screw bolt nut assortment kit

this is a set of m3 button head screws and nuts with 10.9 grade high strength. great for use in confined areas as fixing component, industrial and construction fasteners. there are many different length of screws that you can use for various purposes. total 300 pieces of screws and nuts for general purpose use will meet your daily basic needs. used widely in the home and office appliance, communication equipment, ship assembly and other machinery industry..syi