Dang Steel is a reputable manufacturer and supplier of top-notch Alloy Steel Grade 12.9 Fasteners, proudly based in Da Nang, Vietnam. Known for their commitment to quality and precision, Dang Steel serves high-performance industries that demand fasteners with outstanding strength and durability. The company employs cutting-edge production methods and follows strict international standards, ensuring that every fastener is up to the task. Their Grade 12.9 fasteners find applications in engineering, construction, and automotive sectors. With a focus on timely delivery, technical support, and competitive pricing, Dang Steel has established itself as a go-to supplier in both local and global markets.
Alloy Steel Grade 12.9 Fasteners are crafted from high-strength medium carbon alloy steel, typically treated through tempering and quenching. The key alloying elements include carbon (0.35–0.45%), manganese (0.30–0.60%), chromium, and molybdenum, which enhance their hardenability and strength. These fasteners boast a minimum tensile strength of 1220 MPa and a yield strength of at least 1100 MPa. They also provide excellent fatigue resistance, high hardness (usually between 39–44 HRC), and impressive load-bearing capacity. These mechanical properties make them perfect for critical structural and high-torque applications in demanding environments.
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 Grade 12.9 Fasteners are specifically designed for high-stress and load-bearing applications where strength and reliability are crucial. In the automotive sector, they are frequently used in engine assemblies, suspension systems, and drivetrain components. In construction and infrastructure, these fasteners play a vital role in securing steel frameworks, bridges, and load-bearing joints. They are also essential in heavy machinery, wind turbines, and aerospace equipment, thanks to their exceptional mechanical performance and durability.
Dang 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 Da Nang, Vietnam.
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