Hex bolt Manufacturer-- Haiyan Guangda Hardware Co., Ltd. is located in Haiyan county of Zhejiang province, only 108km from Shanghai, and 10km from the Hangzhoubaycross-seabridge.

Our company was established in 1992, covering a land area of 7,600 square meters, with total investment of RMB 16million yuan. As a hex bolt manufacturer of fasteners, we design, manufacture and sell many kinds of fasteners, carriage bolt according to ANSI/ASME B18.2.1, DIN, BSW, and ISO standards. We mainly produce hex bolts, hex nuts, carriage bolts, T-bolts, U-bolts, machine screws, thread rods and non-standard according to the drawings.

Assured with ISO 9001 quality system, based on the concept: quality is the life, and faith is the root. We strictly follow the carriage bolt requirements of customers, and continuously improve our production technology, improve our product quality to meet or even exceed the quality requirements of customers.

We are exported worldwide and supplied to Europe, Asia, Africa and America. Our products are widely used in tower, construction, guardrail & other industrial fields.

We would like to develop together with our customers in the competitive market all over the world, and welcome to our factory, instruction and bargaining. We will try our best to give customers good service.

The Market Actuality and Development of Chinese Cast Iron Valve Products

In past 10 years the annual output of Chinese cast iron valves and pipefitting has declined to 200,000 tons from 800,000 tons, the average rate of descent is about 20%. According to related data, the application domain of cast iron can be approximately divided into eight aspects: wastewater water pipe, building water pipe, building drainage pipe, underground drainage pipe, gas transmission pipe, electrical bushing, agricultural pipe and industrial pipe. Among them the development of building water pipe and building drainage pipe is the fastest, followed by housing and agricultural pipes, the underground carriage bolt drainage pipe and gas transmission pipe development has great gaps compared with foreign countries. In recent years, the production capacity of cast iron and pipefittings has decreased slightly, but it is still unbalanced. The majority manufacturers of cast iron and pipefittings are small plastic valve enterprises, large and medium sized enterprises are very little...+ More...