Carbon steel hot dipped galvanized part thread yellow zinc nickel plated din 931 bolt

An outer hexagon bolt is a common fastener, consisting of a head and a screw (a cylinder with external threads), usually used in conjunction with a nut to firmly connect two parts with a through hole. Its head is hexagonal, there is no depression, so it is called the outer hexagonal bolt.

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External hexagon bolts are classified according to the connection method and head shape:

According to the force mode of connection: there are ordinary and reamed holes. The bolts used for reaming holes need to match the size of the holes and are mainly used for occasions subjected to transverse forces.

According to the shape of the head: hexagonal head, round head, square head, sink first. Among them, countersunk bolts are often used for occasions that require the surface to be flat after connection.

Performance grades and materials

The performance grade label of the outer hexagonal bolt is composed of two parts, which respectively represent the nominal tensile strength value and the bending strength ratio of the bolt material. For example, a bolt with a performance grade of 4.6 means that the nominal tensile strength of the bolt material is 400MPa and the bending strength ratio is 0.6.

Applicable occasion

The outer hexagon bolt is suitable for the connection of large equipment, thin wall parts or the occasion of impact, vibration or alternating load, the occasion of long thread requirements, low cost, low dynamic strength, low precision requirements of mechanical connection.

Manufacturing process and frequently asked questions

In the manufacturing process, outer hexagon bolts may have burr problems. The main reasons include the clamp is not aligned with the lower die, the lower die is too large or too small, the support surface has burrs, the striking time is too fast, and the die hits the main die on the top of the screw when the cutting edge just leaves the main die. To solve these problems, the production process needs to be carefully adjusted and controlled.

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Strong production capacity

Annual production of about 1.3 million units, strong production strength, and fast supply

Strict testing at every level to ensure the high quality, high safety, and high environmental protection of every product

Strict quality control

Strict testing at every level to ensure the high quality, high safety, and high environmental protection of every product

A professional after-sales service system allows you to receive not only

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Comprehensive after-sales service

A professional after-sales service system allows you to receive not only

It's a collaboration

About Us

Hebei Shangfeng Import and Export Co., Ltd. is a strong production enterprise that integrates production and sales. The company is located in the standard parts production base in Yongnian District, Handan City, known as the hometown of fasteners in China. Since its establishment, it has always adhered to the business philosophy of "valuing reputation, seeking common development; seeking win-win, sharing success", conscientiously fulfilling contracts, being a trustworthy enterprise, having a good market reputation, and operating with integrity, winning numerous customers. With professional level and mature technology in the field of automation, it has rapidly risen in the field of industrial control. The company has a complete, scientific, and quality management system. The company has multiple production equipment and testing instruments. The company mainly deals in fasteners such as No. 5 tail drill tail screws, extended tail drill screws, external hexagonal bolts, tensile and internal explosions, joint nuts, car repair geckos, lead screws, nuts, integrated nails, tank nets, anchor bolts, rivet nuts, rivet nuts, etc. The products are sold in the domestic market and exported to multiple countries and regions. Welcome friends from all walks of life to guide, visit and negotiate business.