Shandong Meiling High-Strength Fasteners Branch has been engaged in the production of high-strength fasteners for more than 30 years. It is a member of the National Fastener Association, a member unit of the National Fastener Standardization Committee and a major material and equipment supplier of Sinopec, PetroChina, CNOOC, China National Chemical, China Railway Bridge Bureau, China Construction Eighth Bureau and other units. The company has more than 200 advanced specialized equipment for raw material restructuring, cold heading, hot heading, product heat treatment, and mechanical processing required for the production of high-strength fasteners, has advanced surface treatment production technologies such as phosphorus saponification, dacromet, blackening, etc., and have a fully automatic heat treatment production line and a roller-type mesh belt furnace production line introduced by Japan Oriental Engineering Co., Ltd., which can be used for tempering and infiltration, carbon, carbonitriding and other heat treatment processes. The company has realized product standardization production and assembly line operation. The professional testing center can carry out advanced tests such as mechanical performance, bolt tightening axial force, friction coefficient test, low temperature impact test, chemical composition analysis, spectrum detection, metallographic analysis, magnetic particle flaw detection, online piece-by-piece hardness detection, etc., and always accept supervision of Shanghai Fastener Research Institute. The product quality is stable and reliable. In 2006, the products were rated as national inspection-free products.

The main products include: double-headed studs, full-thread bolts, high (low) temperature bolts, set of high-strength large hexagon head bolt for steel structures, set of torsion-shear high-strength bolt for steel structures, cylindrical head welding nails, high-strength special-shaped fasteners and fastener series and German standard (DIN), American standard (ANSI/ASME/ASTM), British standard (BS), Japanese standard (JIS) fasteners, etc. The products are widely used in oil refining and chemical installations and pipelines, high-rise buildings, bridges, engines, railway locomotives, mechanical equipment, and are exported to Europe, the Middle East, Central and South Asia and other countries and regions.

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