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At Hazlewood Fasteners in Canberra, Australia, our high-tensile Grade 5.8 bolts stand as the dependable workhorses for projects demanding more muscle than standard hardware can offer, yet without the extreme rigidity of higher-class fasteners. Designed for industrial builders, machinery fabricators, and equipment manufacturers, these bolts deliver assured clamping force, consistent thread integrity, and reliable resistance to vibration and operational stress. When everyday engineering tasks demand a fortified fastening solution that balances strength, toughness, and cost-efficient performance, Hazlewood’s Grade 5.8 bolts provide unwavering fastening security — built to anchor structures, machines, and assemblies with confidence and control.
Grade 5.8 bolts are precision-formed from medium-carbon steel, strengthened through controlled heat treatment to deliver balanced tensile capability and ductile resilience. Offering a minimum tensile strength of 500 MPa and a yield ratio of 80%, they provide robust mechanical security while retaining flexibility to withstand dynamic loading and moderate shock forces. With reliable thread engagement, fatigue resistance, and stable torque retention, these bolts ensure long service life in industrial and fabrication environments where consistent strength and dependable deformation tolerance are essential.
| 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 widely used in fabrication workshops, plant maintenance, agricultural machinery, light-to-mid-weight structural frames, vehicle assemblies, industrial equipment mounts, storage systems, and general construction tasks. Ideal for securing brackets, machine bodies, steel support frameworks, and operational equipment subject to vibration and fluctuating loads, they offer the perfect mid-strength solution between standard low-carbon fasteners and heavy-duty high-strength bolts. For manufacturers, mechanics, and construction teams seeking durable, economical, and mechanically reliable fastening performance, Grade 5.8 bolts provide a trusted solution built to endure real-world industrial challenges.
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.
Hazlewood Fasteners is a leading manufacturer and supplier of high-quality fasteners in Canberra, Australia, with over 8 years of experience serving global industries.
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