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Yasin Fasteners, located in Istanbul, Turkey, produces High Tensile Grade 5.8 bolts, providing reliable fastening solutions for medium-duty applications. Crafted with precision engineering and thorough quality checks, these bolts meet international strength and performance standards. Grade 5.8 bolts offer higher mechanical strength than Grade 4.8, making them suitable for more demanding use in industries. Yasin Fasteners supplies these bolts to construction, machinery, and automotive sectors worldwide. With a solid reputation for reliability, the company ensures every bolt delivers consistent performance, balancing strength, toughness, and cost-effectiveness for industries needing durable fastening in moderate to high-stress conditions.
Grade 5.8 bolts are made from medium carbon steel with small alloy additions. They undergo heat treatment to enhance their mechanical performance. With a tensile strength of 520 MPa, yield strength of 420 MPa, and around 16% elongation, these bolts provide an increase in strength compared to Grade 4.8. They also feature moderate hardness and good toughness, making them ideal for dynamic loading. Their balanced properties allow them to handle higher stress while remaining cost-efficient, giving reliable fastening solutions for applications that need greater durability and stability.
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
High Tensile Grade 5.8 bolts from Yasin Fasteners are used in construction projects like steel frameworks, bridges, and industrial installations needing stronger fasteners. Automotive industries count on them for medium-duty engine and body components. They fit well in agricultural equipment, material handling machinery, and mining tools where higher load resistance is essential. General engineering sectors use them in equipment assembly, pipelines, and maintenance tasks. With better mechanical performance than Grade 4.8, these bolts are perfect for fastening jobs that require higher strength and toughness without moving into heavy-duty high-tensile grades like 8.8 or 10.9.
Yasin Fasteners is a leading manufacturer and supplier of high-quality fasteners in Istanbul, Turkey, with over 8 years of experience serving global industries.
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