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About this item Specifications: Example:M6*50 (100PCS) refers to a screw with a diameter of 6 mm and a length of 50 mm, a set of 100. It adopts environmentally friendly, non-toxic and non-polluting materials, which are durable and durable. Name: Three combinations of round and round heads. Head shape: round. Standard type: national standard. Category: Machine screws. The thread is deep, the thread is neat and clear, the force is uniform, it is not easy to slip wire, smooth and burr-free, high-quality workmanship, fastness and durability, standard cross recessed head, more convenient to use, easy to install, and convenient to screw by hand. Widely used in home and office appliances, communication equipment, industrial, furniture, auto and motorcycle repair and DIY invention, construction fasteners, etc. › See more product details No Description