DIN7991 Allen Hex Flat Full Threaded M3-20 Black Surface Bolt Screws

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In 1919, Dyke defined them as screws that are threaded all the way to the head. A socket cap screw, also known as a socket head capscrew, socket screw, or Allen bolt, is a type of cap screw with a cylindrical head and hexagonal drive hole.

We will continue to uphold the business philosophy of'focusing on technology, focusing on quality, focusing on service, and creating value for customers' and continue to increase investment, and will provide cost-effective DIN7991 Allen Hex Flat Full Threaded M3-20 Black Surface Bolt Screws to give back to our customers. 'Keeping top quality and customers first service' is our business principle. We'd like to grow with our customers all around the world hand in hand by mutual beneficial cooperation. In the face of fierce competition in the market, our company adheres to the road of professional development, at the same time, realizes the company's strategic upgrading, product upgrading and customer upgrading.