Esha Steel has built a solid reputation as a reliable manufacturer and supplier of Alloy Steel Gr 12.9 Fasteners right in Kolkata. They specialize in providing ultra-high-strength fastening solutions that can handle the toughest industrial environments. With a commitment to precision engineering, top-notch material quality, and strict adherence to global standards, Esha Steel ensures that their fasteners deliver outstanding performance even under extreme loads. Thanks to their advanced manufacturing techniques and thorough testing, you can count on these fasteners for durability, reliability, and a long service life. Catering to industries like heavy machinery, automotive, construction, and engineering, Esha Steel has become a go-to source for robust Alloy Steel Gr 12.9 Fasteners, specifically designed for critical, high-stress applications.
These fasteners are crafted from high-grade alloy steel that includes carbon, chromium, and molybdenum, and they undergo advanced heat-treatment processes such as quenching and tempering. This results in fasteners that boast exceptionally high tensile and yield strength, impressive hardness, and excellent resistance to fatigue and wear. Their mechanical properties also ensure outstanding durability under dynamic loads, great resilience to vibration, and reliable structural integrity in extreme operating conditions. These features make them perfect for applications that require maximum fastening strength and consistent long-term performance.
Standard :Â DIN EN ISO 4014 & 4017 DIN 931 / 933 & IS 1364 / IS 1363
Size :Â Dia M 20 to 100 mm / Inch 3/4″to 3.1/2″
Finish :Â Plain / Zinc plated / Hot dip galvanised
Types :Â Nuts, Bolts, Screws, Sockets, Studs, Screw, Hex Set Screw, Socket Screw, Cap Screw, Pan Head Screw, Socket Head Cap Screw, Washers, Spring Washers, Studs, Anchors
| Grades | Size Range | PS [MPa] | YS (min) [MPa] | TS (min) [MPa] | Hardness [Rockwell] |
| Class 12.9 | Under M16 | 580 | 640 | 800 | |
| 17-72 | 600 | 660 | 830 | C23–34 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Hexagon Bolts / Set Screws | Stud Bolts | Hexagon Nuts | Socket Capscrews |
|---|---|---|---|
DIN 931 | BS4882 | DIN 934 | DIN 912 |
DIN 933 | DIN 976 | BS 1768 | DIN 6912 |
BS 1768 | Â | BS 1769 | DIN 7984 |
UNI 5731 | Â | BS 1083 | ANSI B18.3 |
UNI 5739 | Â | BS 3692 | ISO 4762 |
ISO 4014 | Â | ISO 4032 | UNI 5931 |
ISO 4017 | Â | ISO 4033 | BS 2470 |
BS 1769 | Â | ANSI B18.2.2 | BS 4168 |
BS 3692 | Â | Â | Â |
ANSI B18.2.1 | Â | Â | Â |
Socket & Slotted Set Screws | Socket & Slotted Countersunk Screws | Studs | Washers |
DIN 913 | DIN 963 | DIN 938 | DIN 125 |
DIN 914 | DIN 7991 | DIN 939 | DIN 9021 |
DIN 915 | BS 4168 | DIN 2510 | BS 4320 |
DIN 916 | BS 1981 | BS 4439 | BS 3410 |
DIN 551 | BS 483 | BS 2693 | Â |
DIN 553 | BS 2470 | Â | Spring Washers |
DIN 438 | Â | Â | DIN 127 |
BS 4168 | Â | Â | BS 4464 |
 |  |  | BS 1802 |
Alloy Steel Gr 12.9 Fasteners find their place in various industries that demand superior load-bearing capacity and high mechanical strength. In the automotive sector, they are essential for engine components, gear systems, wheel assemblies, and high-stress structural joints. Manufacturers of heavy machinery and industrial equipment depend on them for assembling cranes, hydraulic systems, and mechanical structures. In construction, you’ll see them used in steel frameworks, bridges, and infrastructure projects that require high-strength fastening. They are also crucial in mining, aerospace, robotics, and precision engineering applications where durability and vibration resistance are key.
Esha Steel is a leading manufacturer, supplier and exporter of high-quality Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel products. Our extensive product range includes Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates, catering to various industries in Kolkata India.
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