Nestled in the vibrant industrial heart of Kinshasa, Yoane Steel stands as a dedicated partner for your most demanding projects, specializing in the supply of robust Alloy Steel Gr 12.9 Fasteners. We understand that the integrity of your structures and machinery relies on the smallest components, which is why our commitment is to provide fasteners that are engineered for peak performance. This focus on quality and resilience makes us a trusted source for industries across the Congo and beyond, ensuring connections that are built to endure the toughest conditions.
The exceptional strength of Alloy Steel Gr 12.9 begins with its precise composition, a careful blend that includes elements like chromium, molybdenum, and nickel. This specific alloy recipe is then hardened and tempered through a controlled heat-treatment process, resulting in a fastener with a minimum tensile strength of 1220 MPa. This translates to a remarkable ability to withstand immense stretching and shearing forces without deforming, while also offering good resistance to shock, making it far superior to standard high-tensile options.
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 |
When your project faces extreme stresses and vibrations, nothing less than Gr 12.9 fasteners will do. They are the go-to choice for critical assemblies in heavy machinery, mining equipment, and high-pressure hydraulic systems where failure is not an option. You’ll find them securing vital components in automotive manufacturing, constructing towering steel frameworks, and within demanding industrial applications like presses and molds. Essentially, wherever safety and structural integrity are paramount, these fasteners provide the unwavering reliability that engineers and builders count on to keep everything firmly connected.
Yoane 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 Kinshasa, Congo.
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