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The Fasteners Mart based in Mumbai, India provides professional fastening products to suit diverse industrial needs. Our High Tensile Grade 5.8 Bolts are manufactured with medium carbon steel and have the standard hex type shape. Due to enhanced tensile strength and durability, they are best used for medium duty applications in engineering, construction, and machinery.
High Tensile Grade 5.8 bolts are produced from medium carbon steel and could be heat treated to increase mechanical strength. Their chemical composition comprises carbon, manganese and iron, providing a balanced mix of strength and ductility. Mechanically, they have a minimum tensile strength of 520 MPa and yield strength about 420 MPa. Physically the bolts have good dimensional accuracy, moderate hardness and resistance to wear. Appropriate for medium-stress applications. They work reliably in construction, general engineering and equipment assembly, providing a cost-effective option with consistent fastening performance in a variety of industrial settings.
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 commonly used in medium-load applications where there is a need for strong and durable performance. They are often used in construction work, structural frameworks, machinery, and automotive components and provide reliable fastening for general engineering and fabrication operations. They are also used in equipment, electrical panels, and agricultural equipment where moderate mechanical stress exists. They excel due to their balanced performance and the reason for being affordable enough for commercial and industrial usage. With a hassle-free installation process and reliable performance, Grade 5.8 bolts prove to be convenient for different non-critical fastening applications.
We are careful to have High Tensile Grade 5.8 bolts securely packaged so as to avoid any harm during shipment. Bolts may be packed depending on order quantities in HDPE bags, corrugated box or wood crates in a clearly readable manner so they can easily be identified and used. In a bid to support quality control standards. We conduct tensile testing, hardness, dimensional check-up, and also surface finish verification. Each batch of bolts goes through industry-quality inspection to prove strength, longevity, and trustworthiness before only the highest-quality ones reach our customers from the construction and engineering industries.
The Fasteners Mart is a leading manufacturer and supplier of high-quality fasteners in Mumbai, India, with over 8 years of experience serving global industries.
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