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Brian Fasteners, located in Houston, USA, has built a solid reputation as a reliable manufacturer and supplier of high-performance industrial fasteners. One of their standout products is the High Tensile Grade 8.8 Bolt, which is celebrated for its remarkable strength and durability. With a strong commitment to quality and precision, Brian Fasteners ensures that their products meet international standards and serve a diverse array of industries. Thanks to their cutting-edge manufacturing facilities and a dedicated team of experts, the company guarantees dependable performance and customer satisfaction. Their Grade 8.8 bolts are perfect for demanding mechanical and structural applications, making them a go-to choice in the engineering and construction fields.
High Tensile Grade 8.8 Bolts are primarily made from medium carbon steel, often enhanced with elements like manganese. These bolts undergo a heat treatment process that boosts their mechanical properties. They boast a minimum tensile strength of 800 MPa and a yield strength of at least 640 MPa, providing excellent toughness and resistance to wear and fatigue. Their hardness typically ranges from 22 to 32 HRC, making them well-suited for high-stress environments. The combination of their material composition and heat treatment ensures these bolts deliver strong, reliable fastening solutions for a variety of demanding applications.
| 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 are extensively used in critical structural and engineering applications due to their impressive strength and durability. They’re commonly found in construction projects, automotive manufacturing, heavy machinery assembly, and infrastructure development. These bolts excel in applications that require resistance to shear and tensile stress, such as in bridges, steel frameworks, and engine components. Their robust performance under both dynamic and static loads makes them ideal for industrial and commercial use. The Grade 8.8 classification guarantees long-lasting reliability in environments that experience mechanical vibration and heavy operational stress.
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.
Brian Fasteners is a leading manufacturer and supplier of high-quality fasteners in Houston , USA, with over 8 years of experience serving global industries.
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