Our ASTM A194 Grade 2H heavy hex nuts are engineered to withstand rigorous high-pressure and high-temperature operating conditions, widely recognized as a core fastener for heavy-duty industrial systems. We select premium hot-forged carbon steel as raw material, and apply strict quenching and tempering heat treatment to optimize the internal structure of the material. This production process greatly improves the overall hardness, tensile strength and fatigue resistance of the nuts, ensuring they will not deform, slip or crack under long-term heavy load.
Every product is manufactured in full compliance with ASTM A194/A194M and ASME B18.2.2 international standards. The threads are precisely machined with smooth surface and tight engagement, which enables quick assembly and reliable locking performance. We offer multiple surface treatment options to suit diverse working environments: plain finish for conventional indoor industrial use, black oxide treatment for enhanced friction and anti-rust ability, hot dip galvanizing for outdoor and humid environments, and PTFE coating that effectively reduces friction and prevents thread seizing during repeated disassembly. The maximum continuous working temperature of this product can reach 455°C, fully meeting the demands of high-temperature pipeline operation.
This series of heavy hex nuts has extremely wide application coverage. It is the standard matching part for ASTM A193 B7 and B7M stud bolts, commonly used in oil and gas exploitation, petrochemical processing plants, thermal power stations, industrial boilers, large pressure vessels and high-pressure fluid piping systems. Whether it is fixed flange connection or equipment assembly in harsh industrial sites, our products can deliver stable and long-lasting performance.
We attach great importance to product quality control. Each batch of goods will go through dimensional inspection, mechanical performance test and surface quality check before delivery, and complete Material Test Report (MTR) and Certificate of Conformity (COC) will be provided to all customers. We support customized marking, special sizes and personalized packaging services. With large in-stock volume, we can arrange delivery within 3 to 5 days for standard products, while customized orders will be completed within the agreed cycle. Adhering to factory direct sales, we provide cost-effective products and thoughtful one-stop export service for global industrial buyers.
