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Hamad Fasteners is a trusted name in the world of industrial-grade fasteners, proudly rooted in Riyadh, Saudi Arabia. We’re all about precision engineering and making sure our customers are happy. Our fastening solutions cater to a variety of industries, including construction, automotive, mechanical, and infrastructure development. One standout product in our lineup is the High Tensile Grade 5.8 Bolt, which strikes a great balance between strength, reliability, and cost-effectiveness. Built to meet international standards and rigorously tested for durability, this bolt is perfect for applications that need moderate tensile strength. At Hamad Fasteners, we’re dedicated to providing high-performance products with consistent quality and reliable service.
The High Tensile Grade 5.8 Bolt is crafted from medium carbon steel that’s been work-hardened and tempered to enhance its mechanical properties. Its chemical makeup usually includes carbon (up to 0.55%), manganese, and small amounts of sulfur and phosphorus. With a minimum tensile strength of 520 MPa and a yield strength of 420 MPa, it outperforms lower-grade bolts. The Grade 5.8 bolt offers moderate strength and good elongation properties, making it perfect for structural applications that don’t face extreme loads but still need dependable fastening under pressure. It meets ISO 898-1 standards.
Strength class | Material and heat treatment | Chemical composition (analysis on the product) % | Minimum hardening temperature °C | ||||
C | P | S | B | ||||
min | max | max | max | max | |||
5.8 Grade Bolt | Carbon steel | – | 0,55 | 0,050 | 0,060 | Not specified | – |
Head marking | Grade | Material | Proof strength | Yield stress (min.) | Tensile strength (min.) | Core hardness (Rockwell) |
Class 5.8 | Low or medium carbon steel | 380 Mpa | 420 Mpa | 520 Mpa | B82-95 |
| Grade 5.8 Fasteners Grades | DIN 933 Grade 12.9 |
| Grade 5.8 Bolts Standard | ASTM F568, ASME SF568 |
| Grade 5.8 studs Size | Dia 1.6mm to 100 mm Inch 3/4“ to 3.1/2“ |
| Grade 5.8 Fasteners finish | Zinc plated / Plain / Hot dip galvanised |
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
Grade 5.8 bolts are used extensively in applications requiring high tensile strength and reliability. It is commonly used in structural steelwork, heavy machinery and automotive assemblies where strong fastening solutions are required. These bolts are suitable for connecting critical components in bridges, buildings and industrial equipment, providing a balance of strength and power. Adherence to stringent international standards ensures safe performance requirements are met at site types, making it desirable for engineers and manufacturers seeking reliable packaging solutions. There are options available
You’ll find High Tensile Grade 5.8 Bolts commonly used in general engineering, construction, and equipment assembly. They’re great for joining components in structural frameworks, light to medium machinery, automotive body panels, and support brackets. These bolts are often the go-to choice for their reliable tensile strength and cost-effectiveness in projects where Grade 4.6 just won’t cut it, but there’s no need for higher-grade bolts like 8.8 or 10.9. Grade 5.8 bolts guarantee consistent and safe performance under moderate loading, making them an excellent option for everyday mechanical and structural applications across various industries.
Hamad Fasteners is one of the Industrial suppliers and manufacturers of quality fasteners in Riyadh, Saudi Arabia, that has spent more than 12 years serving various industries.
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