M2.5 M3 M4 M5 M6 M8 Grade 12.9 Black Hexagon Hex Socket Allen Head Cap Screw DIN912 Allen Bolt Screw L=5-50mm

The large number of high tensile bolts, U-BOLT, wing nuts CE we offered are in reliable quality, with worldwide availability and technical support, thus it has a clear competitive advantage in the global market. We are willing to work hard, use wisdom and sweat to create better products, and sincerely cooperate with friends from all walks of life on the basis of sincere trust and mutual benefit for common development. We will gradually establish a sound R&D, design, manufacturing, sales and customer service system. We have set up a strict quality control system. We're keeping chasing WIN-WIN situation with our consumers.

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Hardware: a screw with a hexagonal recess in the head that is designed to be used with an Allen wrench <At the bottom of this hole is the Allen screw holding the two halves of the elevation knob together. — Patrick Sweeney, Gunsmithing: Rifles, 1999>

Usually the standard is regarded as DIN912

Our company will continue to focus on the R&D and manufacturing of M2.5 M3 M4 M5 M6 M8 Grade 12.9 Black Hexagon Hex Socket Allen Head Cap Screw DIN912 Allen Bolt Screw L=5-50mm, and strive to become a high-quality supplier in the industry. Since the establishment of our company, we have always explored the road of industrial development with revolutionary and leaping innovative ideas. With years of production and sales experience, our company prioritizes customers' requirements, produces second to none quality products and offers exceptional after-sales service support.