Zibo Qiangqiang Group is a group company restructured and established by Zibo High Strength Bolt Factory which conforms to the modern enterprise system. , more than 120 engineers and technicians, is a professional manufacturer of high-strength bolts and nuts in the country, with an annual output of 80 million sets of various high-strength bolts, with an annual output value of 500 million. The production capacity of "Li Shi" brand high-strength bolts was rated as Shandong famous brand, national inspection-free, national top ten assured brands. The company has been successively rated as a high-tech enterprise in Shandong Province, a civilized unit in Shandong Province, a provincial-level beautiful factory, a garden-style unit, and a designated factory for the machinery industry in Shandong Province.
A variety of M14-M22, l0.9 and 12.9-class connecting rod bolts, cylinder head bolts and main bearing bolts are applied to large-size marine engines and petroleum machinery
A variety of bolts and nuts are applicable to hydraulic rotation systems, motors and automobile diverters.
M14-M22 l0.9 and 12.9-class compound torques; and all kinds of track bolts and heavy bolts with which excavating machineries and loading machines are equipped.
The company equips domestic and overseas famous-brand engines with a variety of 10.9 and 12.9-class anti-fatigue connecting rod bolts, cylinder head bolts, main bearing bolts, flywheel bolts and exhaust pipe bolts which adopt the chipless forming process and meet requirements of toque-rotation control methods.