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Lina Fasteners is a trusted manufacturer and supplier located in Tunis, Tunisia, specializing in High Tensile Grade 8.8 Bolts designed for exceptional strength and long-lasting performance. These bolts are crafted to meet international standards, striking a perfect balance between tensile strength, toughness, and durability. Using top-notch carbon and alloy steel, along with advanced heat treatment techniques and rigorous quality checks, Lina Fasteners ensures that their products maintain consistent mechanical properties and precise dimensions. Serving various sectors like construction, infrastructure, automotive, machinery, and industrial engineering, Lina Fasteners is dedicated to providing robust fastening solutions, timely deliveries, and a customer-centric approach.
High Tensile Grade 8.8 Bolts are made from medium carbon or alloy steel and undergo heat treatment to achieve impressive strength. They typically boast a minimum tensile strength of around 800 MPa, with a yield strength that’s about 80% of that tensile value. These bolts are known for their good ductility, toughness, and resistance to fatigue. Grade 8.8 bolts maintain their shape under load, resist wear during tightening, and ensure reliable performance in both static and dynamic load situations.
| 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 dependable fastening. You’ll often see them used in structural steel connections, machinery assembly, automotive parts, bridges, and industrial equipment. They are extensively utilized in construction projects, infrastructure development, manufacturing facilities, and mechanical systems that face moderate to high loads. With their ability to create secure joints, offer a long service life, and provide cost-effective performance, Grade 8.8 bolts are a go-to choice for general engineering and heavy-duty applications.
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.
Lina Fasteners is a leading manufacturer and supplier of high-quality fasteners in Tunis, Tunisia, with over 8 years of experience serving global industries.
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