Din933 Stainless Steel 310s 310S(2520) Stainless Steel Full Thread Hex Bolt Hex Head Bolt Hexagonal Bolt

310S (2520) is a high-nickel high-chromium austenitic heat-resistant steel, with a nickel content of 19-22% and a chromium content of 24-26%. Its outstanding oxidation resistance enables it to operate stably for a long time in high-temperature environments above 1000℃.

This product is a 310S stainless steel hexagonal bolt (also known as 2520 stainless steel hexagonal head screw, high-temperature resistant hexagonal screw), which is a high-end industrial fastener specially designed for extreme working conditions such as ultra-high temperature, strong oxidation, and high corrosion. The product uses 310S austenitic stainless steel (national standard designation 06Cr25Ni20Si2, ASTM A276 310S) as the core base material. It is manufactured through multiple processes including precise hot forging, thread rolling, solution heat treatment, and passivation for rust prevention. It possesses industry-leading high-temperature resistance, oxidation resistance, and corrosion resistance properties. It can operate stably and reliably in an ultra-high temperature environment of over 1000℃. It is equipped with a standard hexagonal structure and provides an extremely stable and long-lasting secure connection solution for high-end fields such as industrial furnaces, heat treatment equipment, kilns, and chemical high-temperature installations.

310S stainless steel exclusive material, superior high-temperature oxidation resistance

310S stainless steel is a high-nickel-chromium austenitic stainless steel with a nickel content of ≥20% and a chromium content of ≥25%. It can work continuously in an ultra-high temperature environment ranging from 800 to 1150℃. Its oxidation resistance is more than three times that of 304/316 stainless steel, completely solving the pain points of ordinary stainless steel such as oxidation, deformation, and strength attenuation at high temperatures; it also has excellent acid and alkali resistance, sulfur corrosion resistance, and anti-warping performance, and can be used in complex environments such as chemical industries and high-temperature flue gas, without magnetism, meeting the standards for high-end industrial use.

Standard external hexagonal structure, convenient and efficient installation

Designed strictly in accordance with the international standards of GB/T 5783 (ISO 4017, DIN 933), with a standard hexagonal head shape, it is compatible with universal wrenches, sockets, and power tools, requiring no special installation tools. It can directly replace ordinary bolts of the same specification, perfectly adapting to manual/automated batch assembly, with high installation efficiency, suitable for all scenarios of fastening needs.

High-precision rolling threads, tight engagement, anti-loosening, and shock resistance

Using a fully automatic rolling thread process, the thread accuracy reaches grade 6g, with full teeth, no burrs, and no slippage. It meshes tightly with the nut/threads, distributes force evenly, has excellent anti-loosening and shock resistance performance, can withstand long-term vibration and impact loads, avoiding the risk of loosening and detachment; the rolling process also enhances the surface hardness and fatigue resistance of the product, with a service life far exceeding that of machined processing bolts.

Solid solution heat treatment process, dual improvement of performance and lifespan

The product undergoes 1100-1150℃ solid solution heat treatment + passivation anti-rust treatment, eliminating internal stress, optimizing the microstructure, and maximizing the high-temperature oxidation resistance and mechanical properties; the surface has high smoothness, no oxide scale, no scratches, a shiny appearance, and enhanced corrosion resistance, reducing stress concentration, and extending the product lifespan.

Full specification coverage, customized services

Covering the full range of M3-M30 thread specifications, with lengths ranging from 6mm to 300mm for all categories, and also supporting non-standard customization. According to customer requirements, special lengths, special threads, semi-tooth/full-tooth structures of external hexagonal bolts can be customized to meet personalized fastening needs for ultra-high-temperature equipment and special working conditions.

Ultra-high temperature anti-oxidation, specially designed for extreme high-temperature conditions: 310S high-nickel chromium stainless steel can operate for a long time at 1100℃ ultra-high temperatures, with outstanding anti-oxidation and anti-rust properties. It perfectly suits high-temperature scenarios such as industrial furnaces and heat treatment equipment, fundamentally addressing the industry's pain point of bolt failure under high temperatures.

Superior corrosion resistance, versatile across multiple scenarios: It combines the excellent corrosion resistance of austenitic stainless steel, with outstanding resistance to acids and alkalis, sulfur corrosion, and salt fog. It can be used for a long time in complex environments such as chemical plants, high-temperature flue gases, and coastal areas without rusting. There is no need for frequent replacement, significantly reducing the later maintenance costs.

Easy installation, versatile: Standard external hexagonal structure, compatible with common tools, can directly replace ordinary bolts, without needing to change the original assembly process. High installation efficiency, suitable for all industry scenarios.

Industrial furnaces and heat treatment fields: The structural fastening of industrial furnaces, heat treatment furnaces, kilns, and heating furnaces is suitable for long-term ultra-high temperature working conditions.

Chemical and energy fields: The fastening of chemical high-temperature reaction vessels, boilers, heat exchangers, flue gas desulfurization equipment, and nuclear power high-temperature devices is suitable for high-temperature and highly corrosive working conditions.

Metallurgy and steel fields: The fastening of high-temperature components of metallurgical furnaces, sintering equipment, and continuous casting equipment is suitable for high-temperature, dust, and corrosive environments.

Automotive and power fields: The fastening of automotive engines, turbochargers, exhaust systems, and racing car modifications' high-temperature components is suitable for high-frequency vibration and high-temperature working conditions.

Aerospace and high-end equipment fields: The high-temperature fastening of aircraft engines, spacecraft components, and high-end experimental equipment is suitable for high load, high temperature, and corrosive environments.

Food and medical high-temperature equipment fields: The fastening of high-temperature sterilization equipment, food baking equipment, and medical high-temperature instruments is in line with hygiene-level usage standards.