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Mazin Fasteners is a reputable manufacturer and supplier of High Tensile Grade 8.8 Bolts, proudly based in Muscat, Oman. They provide reliable fastening solutions tailored for both structural and industrial needs. The company adheres to strict quality control measures and international standards like ISO and DIN, ensuring that their products consistently perform well and last long. With state-of-the-art manufacturing facilities and a skilled technical team, Mazin Fasteners crafts bolts with precise threading, uniform strength, and excellent dimensional accuracy. Their dedication to material traceability, competitive pricing, and timely delivery makes them a go-to partner for projects in construction, oil & gas, power generation, and heavy engineering.
High Tensile Grade 8.8 Bolts are crafted from medium carbon steel or low-alloy steel and undergo heat treatment through quenching and tempering. These bolts typically boast a minimum tensile strength of around 800 MPa and a yield strength of about 640 MPa. They are known for their impressive hardness, excellent load-bearing capacity, and reliable fatigue resistance. Thanks to their controlled mechanical properties, they resist deformation and maintain a stable clamping force, ensuring consistent performance whether under static or dynamic loads.
| Bolts Grade | Material and heat treatment | Chemical composition (analysis on the product) % | °C Min hardening temperature | ||||
| C | P | S | B | ||||
| minimum | max | max | max | max | |||
| 8.8 | Alloy/ Carbon steel (B, Mn, Cr), quenched and tempered | 0,15(3) | 0,40 | 0,025 | 0,025 | 0,003 | 425 |
| Quenched and tempered carbon steel Bolts | 0,25 | 0,55 | 0,025 | 0,025 | |||
| Quenched and tempered alloy steel Bolts | |||||||
| Grades | Size Range | PS [MPa] | YS (min) [MPa] | TS (min) [MPa] | Hardness [Rockwell] |
|---|---|---|---|---|---|
| Class 8.8 | Under M16 | 580 | 640 | 800 | |
| 17-72 | 600 | 660 | 830 | C23–34 |
| Grade 8.8 Bolts Grades | Grade 8.8 |
| En 15048 Grade 8.8 Size | Dia M 20 to 100 mm Inch 3/4“ to 3.1/2“ |
| 8.8 High Tensile Bolts Standard | ASTM A324, ASME SA324 |
| Grade 8.8 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.
High Tensile Grade 8.8 Bolts find their place in a variety of applications that demand strong and reliable fastening without breaking the bank. You’ll often see them in structural steel connections, construction frameworks, machinery assembly, automotive components, and general engineering equipment. They play a crucial role in infrastructure projects, power plants, material handling systems, and industrial setups that face vibration and mechanical stress. With a perfect blend of strength and toughness, Grade 8.8 bolts are ideal for both structural and industrial fastening needs.
Our grade 8.8 bolts are carefully loaded to prevent damage during transport. Wooden boxes or sturdy boxes that meet international standards are used. Each bolt is marked with the trademark, grade, size and lot number. We offer EN 10204-3.1 and EN 10204-3.2 certificates, product certificates, NABL-approved laboratory test reports, and professional test certificates. In addition, 100% of radiographic and third-party inspection reports are provided to ensure quality control and compliance.
Mazin Fasteners is a leading manufacturer and supplier of high-quality fasteners in Muscat, OMAN, with over 8 years of experience serving global industries.
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