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The Allen key is an L-shaped hexagonal bar wrench designed to screw the hexagon socket head cap screws. The model number is based on the hexagonal opposite side dimensions. The bolt size has national standards. Metric specifications: 8, 10, 12, 14, 17, 19, 21, 22, 23, 24, 27, 30, 32, 34, 36, 38, 41, 46, 50, 55, 60 mm. Inch specifications: 5/16"--2-3/8" 26 types. Cangzhou Dean Explosion-Proof Special Tool Manufacturing Co., Ltd. is an independent, authoritative and professional manufacturer, mainly producing "Security" brand high-grade beryllium bronze and aluminum bronze explosion-proof tools. Founded in 1986, the company is located in Botou City, East China. It is the largest professional manufacturer of explosion-proof tools in the world. The company produces more than 460 series of explosion-proof tools with more than 5,000 specifications. Mainly used in petroleum, chemical, mining, gas production, power generation, smelting, storage and transportation, gas production, and other inflammable and explosive places to ensure national property and personal safety. Our company is an import and export enterprise, and has obtained ISO9002 international quality system certification and UKAS product certification. It is the national standard unit for manufacturing explosion-proof tools. In 2006, it passed the ISO9001:2000 international quality system certification. With China's accession to the WTO, in order to adapt to the European and American markets, to meet the needs of European and American customers, the company developed the "De'an" brand high-grade large-scale steel special tools according to the national standard GB/T4388-4393-1995. The product is forged by a large friction press (300KN-1600KN) and tested by X-ray flaw detector. The quality is internationally leading. High quality and low price, superior style, exported to Europe, America and Southeast Asia market, won the praise of customers.
The products are sold to the United States, South Korea, Japan, Germany, France, Iran, Singapore, United Arab Emirates, Turkey, Denmark, India and other countries and regions, and have been well received by users.
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What are the models and functions of special hexagons?