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As a premier manufacturer and supplier of industrial-grade fastening solutions, we deliver high-performance components engineered for rigorous structural demands.
Designed specifically for volume procurement and streamlined assembly operations to enhance production efficiency.
Features a robust high-tensile architecture suitable for heavy machinery, automotive assemblies, and critical frameworks.
Integrated flange design optimizes load distribution, eliminates extra components, and accelerates production line workflows.
The M8-1.25 * 25mm flanged hexagonal bolt is meticulously engineered to provide uncompromising structural integrity for high-stress applications. Forged to a property class of 10.9, this fastener delivers exceptional tensile and yield strength, making it an indispensable component for heavy machinery, automotive assemblies, and robust construction frameworks. The integrated flanged head inherently expands the bearing surface, distributing clamping forces evenly across the mating materials. This architectural advantage effectively mitigates the risk of surface indentation and eliminates the need for supplementary flat washers, thereby accelerating assembly line operations. Coated with a uniform, high-density galvanized layer, the bolt exhibits a sleek, metallic finish that serves as a formidable barrier against oxidation and corrosive elements. When tightened to the recommended torque of 25 N·m using a calibrated wrench, the precision-cut threads lock seamlessly into place, ensuring a rigid, vibration-resistant joint that maintains its structural stability even under continuous dynamic loading.
To ensure absolute compatibility with your engineering requirements and assembly protocols, the precise technical parameters of this fastener are detailed below. Every dimension and material property is strictly controlled during the manufacturing process to guarantee consistent performance across large-scale production runs.
| Specification Category | Parameter Details |
|---|---|
| Product Name | Flange Hexagonal Bolt |
| Thread Size | M8 |
| Pitch | 1.25 mm |
| Length | 25 mm |
| Property Class | 10.9 |
| Surface Treatment | Galvanized / Zinc-plated |
| Head Type | Flanged Hex Head |
| Recommended Installation Torque | 25 N·m |
| Manufacturer | Merid Machinery |
Engineered to resolve common assembly challenges, this fastener provides tangible improvements to both product longevity and manufacturing efficiency.
Exceptional Load Capacity: Forged to property class 10.9, offering superior tensile strength that securely anchors critical framework components without deformation under extreme mechanical stress.
Streamlined Assembly Process: The built-in flange acts as an integrated washer, reducing the number of individual components required on the assembly line, which directly accelerates production cycles and minimizes inventory complexity.
Advanced Anti-Corrosion Shield: The premium zinc-plated finish provides a tactile, smooth surface that actively resists moisture, chemical exposure, and atmospheric degradation, ensuring long-term aesthetic and structural reliability.
Vibration Resistance: Precision-machined M8-1.25 threads guarantee a flush, tight bite into mating surfaces, drastically reducing the likelihood of loosening when subjected to continuous operational vibrations.
Standardized Torque Compliance: Designed to perform optimally at a precise 25 N·m fastening torque, allowing engineering teams to implement standardized tightening protocols with calibrated tools for consistent installations.
When sourcing fasteners for critical infrastructure, the underlying metallurgy dictates the safety of the entire project. This fastener is forged from premium-grade alloys to meet the rigorous demands of high-stress environments.
Property Class 10.9 Metallurgy: Manufactured to deliver exceptional yield and tensile strength, preventing shearing or snapping under immense mechanical loads.
Heavy-Duty Application Readiness: Perfectly suited for the automotive, agricultural, and construction sectors where structural failure is not an option.
Deformation Resistance: The hardened steel composition ensures the bolt maintains its precise geometric shape even when subjected to extreme torque and dynamic operational forces.
Enhanced Joint Integrity: By utilizing high-strength materials, engineers can achieve higher clamping forces, resulting in more rigid and secure mechanical joints that elevate the overall quality of your assemblies.
Environmental degradation is a primary concern for exposed structural joints. Our advanced surface treatment protocols ensure these fasteners outlast the elements and maintain their visual appeal.
Uniform Zinc-Plated Coating: A meticulously applied galvanized layer envelops the entire bolt, providing a smooth, visually appealing metallic finish that acts as a sacrificial anode against rust.
Harsh Environment Durability: Highly effective at repelling moisture, preventing oxidation in damp, humid, or outdoor industrial settings where standard bare metal would rapidly deteriorate.
Extended Component Lifespan: The robust barrier significantly delays the onset of red rust, reducing the frequency of maintenance replacements and lowering long-term operational costs for end-users.
Friction Consistency: The galvanized surface offers a predictable coefficient of friction, ensuring that applied torque accurately translates into the desired clamping force without galling or seizing during installation.
Efficiency on the assembly line directly impacts the bottom line. The geometric design of this bolt is optimized for rapid, secure, and damage-free installation.
Integrated Flange Architecture: The widened circular base beneath the hex head eliminates the necessity for separate flat washers, simplifying the bill of materials and speeding up manual or automated insertion.
Optimized Pressure Distribution: By expanding the bearing surface area, the flange evenly dissipates clamping pressure, protecting softer mating materials from indentation, scoring, or stress fractures.
Anti-Loosening Characteristics: The broad contact area creates enhanced friction against the joint surface, inherently resisting rotational loosening caused by thermal cycling or mechanical vibration.
Tool Engagement: The precisely forged hex head allows for seamless, slip-free engagement with standard sockets and pneumatic wrenches, preventing rounding and ensuring rapid fastening.
Predictability in assembly requires absolute dimensional consistency. Every bolt is machined to exact tolerances to ensure seamless integration into your production workflows.
Exact M8-1.25 Specifications: The 1.25 mm pitch is cut with microscopic precision to guarantee smooth threading, eliminating cross-threading risks during high-speed automated assembly.
Standardized 25mm Length: Provides optimal thread engagement depth for secure anchoring without excessive protrusion, maintaining a clean aesthetic and avoiding interference with moving mechanical parts.
Calibrated Torque Integration: Engineered to achieve maximum clamping efficiency at exactly 25 N·m. This specific metric allows quality assurance teams to standardize torque tools across the facility.
Consistent Batch Uniformity: Advanced machining ensures that every single bolt in a large-scale order shares the exact same dimensional profile, preventing assembly line bottlenecks caused by out-of-spec components.
Procurement professionals demand components that perform flawlessly straight out of the box. Our exhaustive testing protocols guarantee zero compromises on reliability.
Rigorous Tensile Testing: Each production batch undergoes severe pull testing to verify that the 10.9 property class standards are strictly met, ensuring absolute safety in load-bearing applications.
Salt Spray Verification: The galvanized finish is subjected to accelerated environmental testing in salt spray chambers to validate its long-term rust-resistant capabilities before leaving the facility.
Torque-to-Yield Analysis: We continuously monitor the rotational force limits to ensure the bolt can comfortably withstand the recommended 25 N·m installation torque without thread stripping or head fracture.
Defect Elimination: Automated optical inspection systems scan the threads and flange surfaces for microscopic fractures or burrs, ensuring only flawless components reach your assembly facility.
Partnering with a robust manufacturing entity mitigates supply chain risks and ensures continuous operational flow for your assembly plants.
Decades of Engineering Heritage: Established in 1991, Merid Machinery brings over three decades of deep-rooted metallurgical expertise to every fastener produced.
Massive Production Infrastructure: Operating out of a sprawling 12,000-square-yard facility in Qingdao, China, we possess the heavy machinery required to fulfill immense volume requirements rapidly.
Uninterrupted Supply Lines: Our streamlined manufacturing processes and extensive raw material reserves guarantee stable, on-time deliveries, protecting your production schedules from unexpected shortages.
Comprehensive Customization Services: Beyond standard specifications, our engineering teams are fully equipped to develop and manufacture custom metal fabrication solutions tailored to your proprietary architectural designs.
Selecting the right manufacturing partner is crucial for maintaining the integrity of your end products. We provide a distinct competitive advantage through operational excellence.
Direct Source Economics: By manufacturing our components in-house, we eliminate intermediary markups, providing premium-grade hardware at highly competitive procurement rates.
Uncompromising Quality Assurance: Our facility adheres to stringent international manufacturing standards, meaning every component you receive has been vetted for structural perfection.
Global Logistics Proficiency: Located in a major industrial hub, we leverage optimized shipping networks to deliver large-scale orders efficiently across international borders.
Dedicated Technical Support: Our experienced engineering team is readily available to consult on torque specifications, material compatibility, and custom fabrication requirements.
Scalable Production: Whether you require a standard batch of galvanized bolts or a continuous, high-volume supply for an ongoing automotive assembly line, our facility scales instantly to meet your exact demands.
To assist your engineering and procurement teams, we have compiled detailed answers to the most critical technical inquiries regarding this fastener.
What applications are best suited for property class 10.9 fasteners?
Class 10.9 fasteners possess exceptional tensile and yield strengths, making them ideal for heavy-duty applications such as automotive suspensions, heavy agricultural machinery, and critical structural steel frameworks where immense load-bearing capacity is an absolute requirement.
How does the integrated flange improve the assembly process?
The flanged head acts as a built-in washer, distributing the clamping load over a wider surface area. This prevents damage to the mating material and eliminates the time, labor, and inventory costs associated with manually placing separate flat washers during assembly.
Is the galvanized finish suitable for outdoor environmental exposure?
Yes, the high-quality zinc-plated surface creates a durable, sacrificial protective barrier against moisture and atmospheric chemicals. This significantly inhibits oxidation and rust, ensuring long-lasting aesthetic and structural performance in outdoor or humid industrial environments.
Why is the recommended installation torque specified at exactly 25 N·m?
Applying 25 N·m of torque with a calibrated wrench ensures the M8 bolt stretches to its optimal tension without exceeding its yield point. This precise clamping force maximizes joint rigidity, ensures proper thread engagement, and prevents loosening from operational vibrations.
Can your facility accommodate custom modifications to this standard bolt?
Absolutely. With our expansive 12,000-square-yard facility and extensive manufacturing capabilities, our engineering team can customize thread lengths, adjust surface treatments, or modify head dimensions to seamlessly integrate with your proprietary mechanical designs.
