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Fasteners are indispensable key basic components in the machinery industry and are hailed as the "rice of industry". Ningbo is a renowned manufacturing powerhouse and the capital of fasteners in China. 85% of the fastener enterprises in Zhenhai District are concentrated in Jiulonghu Town. To effectively integrate resources and better serve enterprises, the Zhenhai District Fastener Industry Association and the Jiulonghu Chamber of Commerce have adopted an integrated operation model. After several years of efforts, the business association was awarded the title of "Four Good Chamber of Commerce" at the national level, and Jiulonghu Town was recognized as the "Fastener Town of China" and a "Demonstration Town for Industrial Cluster Economy of China".

On June 6, 2025, the "Zhenhai District Fastener Industry Trade Secret Protection Alliance", initiated by the Zhenhai District Market Supervision and Administration Bureau, organized by the District Fastener Industry Association, and jointly established with key enterprises within the region, was officially inaugurated. Sheng Weigang, deputy director of the Zhenhai District Market Supervision and Administration Bureau, presided over the event. Xiang Wei, secretary-general of the association, introduced the work of the trade secret demonstration station. Pan Lingna, director of the Price Supervision and Anti-Unfair Competition Division of the Ningbo Market Supervision and Administration Bureau, introduced the significant importance of establishing the alliance and conducted the unveiling ceremony.

On August 6, 2025, the fourth executive council meeting of the fourth session of Zhejiang Fastener Industry Association (the fifth session of Haiyan Fastener Industry Chamber of Commerce) was successfully held at the Radisson Weijia Hotel in Haiyan. This meeting summarized and reviewed the work carried out by the association and the chamber of commerce in the first half of the year, and made overall arrangements for the key tasks in the second half of the year.

According to the statistics of the General Administration of Customs of China, the total import value of fasteners in China reached 2.477 billion US dollars in 2024, an increase of 1.28% compared with the previous year. The total export volume reached 9.564 billion US dollars, increasing by 4.65% year-on-year, and a trade surplus of approximately 7.087 billion US dollars was achieved. Overall data shows that China's fastener import and export trade will maintain a steady growth trend in 2024.

In the microcosm of mechanical manufacturing, an Allen bolt with a diameter of less than one centimeter might be the key to ensuring the rapid speed of high-speed trains and the launch of spacecraft. This type of fastener with a hexagonal groove on the top has become a "universal screw" in the industrial field due to its strong torque resistance and small space occupation. This article will systematically analyze its classification system and application scenarios.

The German Industrial Standard (DIN) is renowned for its precise tolerances and performance classification. Its core model system for hexagon socket bolts consists of three major categories: