2H Heavy Hex Nuts With Pin

In oil, gas and petrochemical industries, they are widely installed on pipeline flanges, pressure vessels, heat exchangers and onshore/offshore drilling rigs. Working under high temperature, high pressure and continuous fluid vibration, the built-in pin locks the nut rotation effectively, avoiding connection failure caused by long-term pipeline vibration and pressure fluctuation, securing critical high-pressure sealing joints to guarantee operational safety of refineries and natural gas transmission systems.  

In infrastructure and structural engineering, these nuts fasten heavy steel beams, bridge girders, high-rise building steel frames and bridge bearing components. Compared with standard nuts, their thicker wall bears greater static load and wind-induced dynamic vibration; the anti-loosening pin eliminates hidden dangers of nut loosening from long-term vehicle vibration and natural wind load, maintaining structural stability of large bridges and high-rise steel structures permanentlyAlibaba.co....
Power generation sectors including thermal power, hydropower and wind energy also rely heavily on them. They anchor turbine bases, generator units, wind turbine tower flanges and large power equipment supports. Wind turbines endure frequent alternating vibration from wind loads, while thermal power facilities face cyclic temperature changes; the pin locking mechanism sustains reliable preload without nut back-off, securing heavy power equipment foundations steadily.

Besides, marine engineering, heavy mining machinery and heavy-duty transportation equipment adopt these nuts. Offshore platforms suffer salt corrosion and ocean wave vibration; mining crushers and conveyors generate intense mechanical shock. The anti-rotation pin cooperates with 2H base material's high tensile strength to resist impact, vibration and harsh ambient erosion, securing key load-bearing connections and lowering regular maintenance frequency significantly.

Established in 2005, our company has evolved over two decades of continuous development into a leading regional enterprise in the fastener industry with fully automated end-to-end production. With an annual output value exceeding RMB 130 million, our product range covers diverse market segments from mid-range to high-end and is distributed worldwide