Shenzhen force crown rings, screws products are widely used in ports, power, steel, shipbuilding, petrochemical, mining, railways, construction, metallurgy, automobile manufacturing, plastics machinery, industrial control, highways, large transport, pipeline paved, slope governance protection of tunnels, wells, marine salvage, marine engineering, airport construction, bridges, aviation, aerospace, stadiums and other important industries as well as machinery and equipment for infrastructure projects. Surface treatment of screw rings: CORRUD-DT, this surface treatment processing than ordinary galvanized strong antiseptic effect of at least 20 times. External thread length ¨ H-¨, bolts and other parts fixed together, the replacement must be selected when the bolt of the same quality grade. Screw rings as a whole forging, and by normalizing treatment and removal of oxide; forgings burning, cracks, defects; unified screw rings after hardness test, HRB67 hardness value of ~ 95. The power of the crown rings, screws grade strength of 12.9. Rings, screws must be installed vertically with the workpiece plane, and the joints need to smooth joints need to close. Must adjust to the stretching direction of the screw to avoid contact with sharp edges objects. Screw rings with the test load by 2.5 times the working load, 20000 fatigue test were 1.5 times the working load. Screw rings to meet or exceed the requirements of the ASME B30.26 standard. Screw rings from alloy steel by high reference the German RUD WBG type production, the large number of products exported to Europe, and through the local standard test of the G80 level. Better materials, higher than the existing domestic rings screw pull tensile test report. Screw rings professionals to operate and see the instructions for use, and spreader connections, spreader and rings joints rotate freely, should be professionals to conduct regular safety testing. Maximum working load of up to 30T, and customizable inch thread.