Located in the heart of Addis Ababa, Desta Steel stands as a trusted pillar for industrial and construction needs across Ethiopia. We take pride in supplying high-integrity components, including our premium Carbon Steel 12.9 fasteners. Recognized for their exceptional strength, these bolts and screws are engineered to meet the most demanding applications, ensuring reliability and safety for projects that simply cannot afford to compromise. When your work depends on unwavering performance, our 12.9 fasteners provide the solid foundation you need.
The exceptional performance of these fasteners comes from a specific composition and meticulous heat treatment. Primarily made from carbon steel alloyed with elements like chromium and molybdenum, they undergo a rigorous quenching and tempering process. This results in a remarkable tensile strength of 1200 MPa minimum and a yield strength of 1080 MPa, earning them the 12.9 grade designation. This means they offer an incredible resistance to stretching and breaking under immense loads, making them exceptionally tough and durable.
| Carbon Steel 12.9 | C | P | S | B |
| 0.28-0.5 | 0.025 | 0.025 | 0.003 |
| Nominal thread diameter size range [mm] | Proof strength [MPa] | Yield strength (min) [MPa] | Tensile strength (min) [MPa] | Hardness [Rockwell] |
| 1.6–100 | 970 | 1100 | 1220 | C39–44 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Jaxon Steel is a trustworthy manufacturer and supplier of quality Carbon Steel 12.9 Fasteners in Addis Ababa, Ethiopia. We specialize in top-grade steel products like Carbon Steel, Alloy Steel, Mild Steel, and Galvanized Steel, with the main focus being on Carbon Steel Sheets and Plates. Our vast inventory also includes Pipes, Tubes, Flanges, Forged Fittings, and Bars. Committed to fast delivery and excellent customer service, we use only the finest raw materials to deliver excellent strength, durability, and performance for high-demand industrial uses. Contact us today for all your Carbon Steel 12.9 Fasteners needs!
| DIA | M4 | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M22 | M24 | M27 | M30 | M33 | M36 | M39 | M42 | M45 | M48 | M52 |
| Pitch | 0.7 | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | ||||||||
| Grade A upto length | 40 | 50 | 60 | 80 | 100 | 120 | 140 | 150 | Grade A not applicable to these dia’s | ||||||||||||
| Head Across Flat (S) Nom = Max Min Grade A Grade B | 7 | 8 | 10 | 13 | 16 | 18 | 21 | 24 | 27 | 30 | 34 | 36 | 41 | 46 | 50 | 55 | 60 | 65 | 70 | 75 | 80 |
| 6.78 | 7.78 | 9.78 | 12.73 | 15.73 | 17.73 | 20.67 | 23.67 | 26.67 | 29.67 | 33.38 | 35.38 | Grade A not applicable to these dia’s | |||||||||
| 6.64 | 7.64 | 9.64 | 12.57 | 15.57 | 17.57 | 20.16 | 23.16 | 26.16 | 29.16 | 33 | 35 | 40 | 45 | 49 | 53.8 | 58.8 | 63.1 | 68.1 | 73.1 | 78.1 | |
| Head Height (K) Nom Tol + or – Grade A Grade B | 2.8 | 3.5 | 4 | 5.3 | 6.4 | 7.5 | 8.8 | 10 | 11.5 | 12.5 | 14 | 15 | 17 | 18.7 | 21 | 22.5 | 25 | 26 | 28 | 30 | 33 |
| 0.125 | 0.15 | 0.18 | 0.215 | Grade A not applicable to these dia’s | |||||||||||||||||
| 0.2 | 0.24 | 0.29 | 0.35 | 0.42 | 0.5 | ||||||||||||||||
| Across corners e Min Grade A Grade B | 7.66 | 8.79 | 11.05 | 14.38 | 17.77 | 20.03 | 23.36 | 26.75 | 30.14 | 33.53 | 37.72 | 39.98 | Grade A not applicable to these dia’s | ||||||||
| 7.5 | 8.63 | 10.89 | 14.2 | 17.59 | 19.85 | 22.78 | 26.17 | 29.56 | 32.95 | 37.29 | 39.55 | 45.2 | 50.85 | 55.37 | 60.79 | 66.44 | 71.3 | 76.95 | 82.6 | 88.25 | |
| Major Dia at thread (min) | 3.838 | 4.826 | 5.794 | 7.76 | 9.732 | 11.701 | 13.682 | 15.682 | 17.623 | 19.623 | 21.623 | 23.577 | 26.577 | 29.522 | 32.522 | 35.465 | 38.465 | 41.437 | 44.437 | 47.399 | 51.399 |
| Major Dia at thread (max) | 3.978 | 4.976 | 5.974 | 7.972 | 9.968 | 11.966 | 13.962 | 15.962 | 17.958 | 19.958 | 21.958 | 23.952 | 26.952 | 29.947 | 32.947 | 35.94 | 38.94 | 41.937 | 44.937 | 47.929 | 51.929 |
| Thread Length (b) For lengths < or = 125mm For lengths > 125mm <= 200mm For lengths > 200mm | 14 | 16 | 18 | 22 | 26 | 30 | 34 | 38 | 42 | 46 | 50 | 54 | 60 | 66 | Not specified as full thread recommended | ||||||
| 20 | 22 | 24 | 28 | 32 | 36 | 40 | 44 | 48 | 52 | 56 | 60 | 66 | 72 | 78 | 84 | 90 | 96 | 102 | 108 | 116 | |
| 33 | 35 | 37 | 41 | 45 | 49 | 53 | 57 | 61 | 65 | 69 | 73 | 79 | 85 | 91 | 97 | 103 | 109 | 115 | 121 | 129 | |
The sheer power of 12.9 fasteners makes them indispensable for critical, high-stress environments. You will find them securing heavy machinery on factory floors, within the structural frames of towering buildings, and in demanding automotive and aerospace assemblies. They are the preferred choice for bolting down massive equipment, constructing bridges, and anywhere a failure of a simple bolt could lead to catastrophic consequences. Essentially, they are used wherever the highest levels of fastener integrity and reliability are non-negotiable for safety and performance.
Desta 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 Addis Ababa, Ethiopia.
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