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Lina Fasteners is a trusted manufacturer and supplier located in Tunis, Tunisia, specializing in High Tensile Grade 5.8 Bolts designed for reliable strength and consistent performance. Crafted to meet international standards, these bolts strike a perfect balance between tensile strength, toughness, and cost-effectiveness. With a focus on quality, Lina Fasteners employs top-notch raw materials, cutting-edge manufacturing techniques, and rigorous inspection processes to guarantee precise dimensions and uniform mechanical properties. Serving various sectors like construction, infrastructure, machinery, and general engineering, Lina Fasteners is dedicated to providing durable fastening solutions, timely deliveries, and a customer-centric approach.
High Tensile Grade 5.8 Bolts are made from medium carbon steel and are usually heat-treated to achieve specific strength and hardness levels. They boast a minimum tensile strength of around 500 MPa, with a yield strength that’s about 80% of that tensile value. These bolts are known for their good ductility, impact resistance, and dependable load-bearing capabilities. Grade 5.8 bolts maintain their structural integrity under moderate stress, resist wear during tightening, and are ideal for applications that demand consistent mechanical performance without excessive brittleness.
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.
High Tensile Grade 5.8 Bolts are frequently utilized in situations that require moderate strength and reliable fastening performance. Common applications include structural steel connections, machinery assembly, automotive parts, agricultural equipment, and general fabrication tasks. They are widely used in construction projects, industrial frameworks, and equipment mounting where a balance of strength and cost is crucial. Grade 5.8 bolts are suitable for both static and light dynamic loads, ensuring secure joints, ease of installation, and dependable performance in various settings.
Our Grade 5.8 bolts are carefully packed to prevent wear and tear during transport. They are packed in standard export packaging, sturdy wooden boxes or boxes that meet international standards. Each bolt is clearly marked with the trademark (company LOGO), grade, size and lot number. We offer EN 10204-3.1, EN 10204-3.2, raw material certificates, NABL-approved laboratory test reports, and professional test certificates for 100%. Radiography test reports and third-party inspection reports are used 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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