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MUKAU FASTENERS, a reputable manufacturer and supplier located in Kinshasa, Congo, focuses on crafting High Tensile Grade 8.8 Bolts that are celebrated for their strength, durability, and precision. These bolts are designed to provide reliable fastening performance even in high-stress and demanding industrial settings. Built to meet international standards, High Tensile Grade 8.8 Bolts boast remarkable resistance to wear, fatigue, and corrosion. MUKAU FASTENERS guarantees top-notch manufacturing through advanced heat treatment and inspection processes, making these bolts perfect for automotive, construction, machinery, and engineering applications that require exceptional tensile strength and lasting performance.
High Tensile Grade 8.8 Bolts are crafted from medium carbon steel, enhanced with elements like manganese, chromium, and molybdenum to boost strength and toughness. These bolts undergo heat treatment through quenching and tempering, achieving a tensile strength of about 800 MPa and a yield strength of roughly 640 MPa. They showcase high hardness, outstanding fatigue resistance, and solid wear performance. With well-balanced mechanical properties, Grade 8.8 Bolts ensure dependable fastening in high-load and vibration-heavy environments, providing stability and reliability in mechanical and structural assemblies.
| 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 extensive use in construction, automotive, machinery, and engineering fields. They are perfect for assembling structural frameworks, heavy equipment, bridges, and industrial machinery that demand high load-bearing capacity. In the automotive sector, these bolts are frequently utilized in engine components, chassis, and suspension systems. They are also employed in railways, mining, and agricultural machinery due to their impressive strength and fatigue resistance. MUKAU FASTENERS supplies these bolts to guarantee superior fastening integrity, a long service life, and dependable performance.
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.
Mukau Fasteners is a leading manufacturer and supplier of high-quality fasteners in Kinshasa, Congo, with over 8 years of experience serving global industries.
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