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High-strength Bolts Manufactory of Chongqing Changjiang Electrical Appliances Industries Co.,Ltd is established in 2003 and has a totally new and advanced fastener producing line with a capacity of 5000 tons of different kinds of bolts. The factory owns about 20 sets of advanced equipments such as continuous multi-station header, automatic double-washers hoppers assembly machine, rolling machine, heat&surface treatment equipments, mechanical and thread inspection apparatus produced by Italian SACMA, American GII, Japan SAKAMURA etc. Processing range: Diameter M4∼M16, Length 9∼110mm; Products: GB, ANSI, DIN, UNI, JIS ,ect.