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Mumbai, India-based The Fasteners Mart specializes in providing high-performance fastening solutions with precision and reliability. Our High Tensile Grade 8.8 Bolts are made of medium carbon steel, generally heat-treated, and follow a standard hexagonal shape. These bolts have high tensile strength and durability and are best suited for automotive, structural, and heavy-duty engineering applications.
Grade 8.8 High Tensile bolts are produced from medium carbon steel, commonly quenched and tempered for increased strength. They comprise carbon, manganese, and trace elements like chromium and molybdenum for added hardness and toughness. Mechanically, they possess a tensile strength of at least 800 MPa and yield strength of 640 MPa. Physically they possess high resistance to wear, dimensional stability, and stress durability in the long term. Ideal for heavy load use, they perform well in construction, automotive, and industrial machinery, where there is a need for strength and fatigue resistance for secure and lasting fastening.
| 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 commonly applied where high-strength and reliable performance is needed. They find application in automobile components, structural steel buildings, heavy equipment and machinery that undergoes dynamic loads. Commonly applied in building, engineering, and manufacturing industries, the bolts ensure secure fastening in load-carrying joints and assemblies of critical importance. Having enhanced tensile as well as yield strength, they are suitable for applications such as bridges, railway, windmills and factory plants. With the exact balance of strength and affordability, Grade 8.8 bolts are the optimal choice for both static and vibration-intensive conditions.
We offer secure and effective packaging of High Tensile Grade 8.8 bolts so that they can reach our clients in pristine condition. Bolts are packaged in HDPE bags, corrugated boxes, or wooden crates, depending on the quantity and destination with proper labeling to facilitate easy identification and handling. To ensure quality we undertake thorough tests such as tensile strength testing, hardness testing, dimensional accuracy verification, and surface coating checks. Each batch is tested as per industry standards to make sure that our bolts provide superior performance, strength, and reliability in harsh industrial uses.
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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