Grade 8.8 hexagon head bolts are the standard type of high-strength bolts, characterised by a tensile strength of ≥800 MPa and a yield strength of ≥640 MPa; they achieve a balance between strength and toughness through quenching and tempering heat treatment.
Grade 8.8 hexagon bolts are the ‘workhorse’ of high-strength fasteners. Through quenching and tempering heat treatment, they achieve a balance between strength and toughness and are widely used in various industrial applications. When selecting these bolts, attention must be paid to the material, surface treatment, matching nuts and installation specifications to ensure a safe and reliable connection.

Grade 8.8 hexagon bolts are widely used in engineering machinery, steel-framed industrial buildings, automotive components, mining equipment, power generation equipment, agricultural machinery and infrastructure installation, amongst other fields. They are the standard fasteners of choice for heavy-duty applications, offering far greater durability than standard Grade 4.8 bolts.

• Ample Production Capacity：We utilise fully automated production lines for mass production, achieving high daily output. We maintain a substantial stock of ready-to-ship items year-round; small orders are available for immediate collection, whilst large-volume orders are scheduled reliably, ensuring no stock shortages.
• Customisation Support：We can produce non-standard lengths, special pitch, and custom-shaped Grade 8.8 bolts. We offer rapid prototyping based on your drawings or samples, ensuring efficient delivery.
• Competitive Pricing：As a manufacturer-direct supplier, we eliminate mark-ups from intermediaries. Bulk purchases offer excellent value for money, with volume-based discounts and ample profit margins for long-term partnerships.
• Rapid Delivery：Standard stock items are dispatched on the same day. Urgent orders are prioritised for production and expedited dispatch, with direct nationwide logistics, effectively resolving customer supply lead time issues.