Why Choose Jinrui Hex Bolts
Reliable Hex Bolt Factory with Global Expertise
Over 20 Years of Specialized Manufacturing Experience
Cutting-Edge Automated Production Equipment
Stringent Full-Process Quality Control
Comprehensive OEM/ODM Customization Services
Stable Wholesale Supply & Global Logistics
Exclusive B2B Full-Process Supporting Services
Our team focuses on providing B-end purchasers with technical selection consultation, order planning optimization and after-sales follow-up support, escorting the entire process from initial inquiry to project delivery, and ensuring efficient and worry-free procurement.
Our Hex Bolt Types & Options
Our hex bolt series is precisely engineered to meet diverse industrial application needs, adhering strictly to international and national standards such as GB, DIN, ISO, JIS, and ASME, while also offering comprehensive non-standard customization services tailored to project-specific requirements. Each batch of products undergoes stringent core performance tests including strength, durability, and dimensional accuracy, complemented by diversified surface treatment solutions to precisely adapt to various working conditions and environmental demands.
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Reliable Hex Bolts for Your Next Project
Our hex bolts are available in multiple materials, grades, and finishes to meet different industrial and engineering requirements.
We support both standard specifications and custom solutions with stable quality and consistent supply.
Contact us today to discuss your application, request specifications, or get a quotation.
Hex Bolt Specifications & Technical Details
Our factory specializes in the production of hexagon bolts and has established a full-process quality control system. Each batch of products passes strict inspections and complies with core international quality standards. With stable performance and high reliability, our products are widely suitable for heavy machinery, construction projects, automobile manufacturing and various key industrial scenarios, providing industrial buyers with highly adaptable fastening solutions.
Core Material Selection (Adapted to Different Scenarios on Demand)
- Carbon Steel: High-quality carbon steels such as Q235 and 45# are selected, featuring high cost-effectiveness and excellent machinability. Suitable for general-load building connections, ordinary mechanical assembly and other scenarios.
- Alloy Steel: Alloy materials such as 40Cr and 35CrMo are adopted, which have high strength, excellent wear resistance and good impact resistance after professional heat treatment. Suitable for heavy-duty equipment, construction machinery and other scenarios with strict strength requirements.
- Stainless Steel (A2/A4): A2 corresponds to 304 stainless steel, resistant to general corrosion; A4 corresponds to 316 stainless steel, with better acid and alkali resistance and high-temperature resistance. Corely suitable for marine engineering, outdoor equipment and humid corrosive environments.
- Special Alloys: Custom supply of special materials such as high-temperature alloys and corrosion-resistant alloys, which can meet the needs of extreme working conditions such as high temperature (≥500℃) and strong corrosion (acid-base media).
Strength Grades and Core Mechanical Indicators
- Standard Strength Grades: Cover all conventional and high-strength grades, including 4.8, 5.6, 8.8, 10.9 and 12.9 grades, adapting to fastening needs from ordinary loads to ultra-high pressure.
- Key Mechanical Parameters: Tensile strength ranges from 400MPa (Grade 4.8) to 1200MPa (Grade 12.9); Yield strength, Brinell/Rockwell hardness strictly comply with industry standards for corresponding grades. Each batch undergoes sampling batch testing and provides test reports.
Executive Standards and Customization Services
- Conventional Executive Standards: DIN standards (DIN 933 full thread, DIN 931 half thread, etc.), ISO standards (ISO 4014, ISO 4017, etc.), ASTM standards (ASTM A307 general grade, ASTM A325 high-strength grade, etc.).
- Customized Adaptation Standards: Can produce products complying with JIS (Japanese Industrial Standards) and GB (National Standards) on demand; Support non-standard customization, including special threads, special-shaped heads, unconventional sizes and other needs, and can provide drawing customization services.
Dimensional Specifications and Tolerance Control
- Conventional Size Range: Thread diameter M3-M36; Bolt length 6mm-300mm; Pitch optional standard coarse thread or fine thread (fine thread is more suitable for precision assembly and anti-vibration scenarios).
- Tolerance Precision Control: Strictly follow ISO/DIN tolerance standards, with key dimension precision deviation ≤±0.02mm to ensure assembly compatibility; Special sizes can be customized up to M48 diameter and 500mm length.
Surface Treatment Processes (Balancing Protection and Aesthetics)
- Conventional Treatment Processes: Galvanizing (electrogalvanizing, basic rust prevention, salt spray test ≥48 hours), Hot-dip galvanizing (thick-layer protection, suitable for outdoor heavy-corrosion environments, salt spray test ≥720 hours), Black oxidation (improves wear resistance and aesthetics, suitable for concealed assembly scenarios), Bright steel (no additional coating, maintains metal natural color, suitable for scenarios requiring high appearance cleanliness).
- Customized Coatings: Can customize anti-corrosion coatings such as Dacromet, nickel plating and copper plating on demand, or customize aesthetic coatings of specific colors to meet special environmental protection and appearance needs.
Core Mechanical Properties and Testing Assurance
- Key Performance Indicators: Excellent torque-bearing capacity (adapts to fastening needs of different strength grades), high fatigue resistance (no fracture after 10⁶ cycle tests, suitable for high-frequency vibration scenarios), strong shear and tensile performance (shear strength ≥800MPa, tensile fracture load complies with grade standards).
- Full-Process Testing: Each batch of products completes salt spray corrosion resistance test, shear/tensile strength test, torque test and dimensional precision inspection, with complete test reports attached.
Manufacturing & Quality Control
As a leading Hex Bolt Manufacturer in China, our production process combines advanced cold forging technology with precise heat treatment, ensuring every Hex Bolt meets international mechanical performance standards. We maintain a complete in-house manufacturing flow, from raw material selection to final inspection, allowing us to control quality at every stage.
Raw Material Verification (Quality Control from the Source)
As a professional hexagon bolt manufacturer, our raw materials are sourced from well-known domestic steel mills and high-quality imported steel mills, eliminating material risks from the source. Each batch of raw materials must pass three strict core tests: chemical composition analysis (to ensure element content meets standards), Brinell/Rockwell hardness testing, and metallographic structure testing. Authoritative material reports can be provided upon customer request. All raw materials can only be warehoused and put into production after signed confirmation by the quality inspection department, fundamentally ensuring the performance stability of subsequent batch processing and accurately meeting the long-term supply and quality requirements of OEM and ODM customers.
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Cold Heading Forming (Guarantee for Precision Shaping)
The factory is equipped with advanced equipment such as multi-station automatic cold headers. The cold heading forming process is adopted to realize the integrated processing of bolt heads, which can ensure the dense structure of the head without porosity defects, and the dimensional accuracy is controlled within ±0.01mm. This process enables the metal structure of the material to be closely arranged along the stress direction, significantly improving the comprehensive mechanical properties of the bolt and laying a stable foundation for subsequent processing. Whether it is mass-produced standard parts, high-consistency precision parts, or special bolts with customized tolerance requirements, stable quality output can be achieved through refined cold heading control.
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Thread Rolling (Core of Thread Precision)
High-precision CNC thread rolling machines are used for thread processing, combined with customized thread rolling wheels, to ensure the uniformity of geometric dimensions such as thread profile and pitch, with a surface roughness Ra ≤ 1.6μm, and the fatigue resistance is improved by more than 30% compared with ordinary processing. It can accurately adapt to international standard threads such as ISO, DIN, UNC (Unified Coarse Thread), and UNF (Unified Fine Thread), and also supports non-standard thread customization. It can ensure the smooth fit between bolts and nuts and long-term connection reliability, fully meeting the strict assembly scenario requirements of industrial buyers and engineering contractors.
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Precision-Controlled Heat Treatment Process (Core Guarantee for High Strength)
For high-strength hexagon bolts such as grades 8.8, 10.9, and 12.9, computer-controlled quenching furnaces and tempering furnaces are used to implement a precise two-stage heat treatment process of "quenching + tempering". The temperature curve is monitored in real time throughout the process, the quenching temperature error is ≤ ±5℃, and the tempering holding time is accurate to the minute, ensuring that the tensile strength and yield strength of each batch of bolts strictly meet the standards. After treatment, the hardness uniformity deviation of the bolts is ≤ 2HRC, and the core mechanical properties are stable, which can be safely adapted to heavy-load and high-risk use scenarios such as building steel structures, heavy machinery, and energy equipment.
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Surface Protection Treatment (Customized Anti-Corrosion Solutions)
A full range of anti-corrosion surface treatment solutions are provided, including galvanizing, hot-dip galvanizing, blackening (black oxidation), Dacromet, etc. The protection level can be customized according to the customer's use environment. Each coating must pass strict third-party testing: salt spray test (galvanizing ≥ 48 hours, hot-dip galvanizing ≥ 720 hours, Dacromet ≥ 1000 hours), coating adhesion test (cross-cut test ≥ Grade 1), and corrosion resistance test. Wholesale buyers can choose the most suitable protection solution based on the use scenario (marine/outdoor/humid environment), industry regulations, or local climate.
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Finished Product Inspection and Certification (Closed-Loop of Factory-Outgoing Quality)
A dual quality control system of "in-process random inspection + factory-outgoing full inspection" is established: online random inspections are conducted every 2 hours during the production process, covering key indicators such as dimensions and thread precision; all finished products must pass profile projector inspection, thread gauge go-no-go testing, tensile test, torque break test, and coating thickness measurement (precision ±1μm) before shipment. Third-party inspection by customer-designated institutions (such as SGS, BV) is supported. Each batch of products is equipped with a unique batch number, which allows full traceability of raw material sources, production process parameters, and testing data. The strict finished product inspection system ensures that all bolts meet international standards and have a complete quality traceability chain.
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Custom Hex Bolt Solutions
As a leading hex bolt manufacturer in China, we provide global buyers with comprehensive customized hex bolt services, which can accurately meet the requirements of non-standard sizes, special materials and project-specific performance. Our engineering and production teams fully support OEM/ODM projects and cooperate closely with global customers to ensure that every parameter meets the standards precisely.
Size Customization
Customizable full-dimensional parameters such as length, diameter, thread pitch and head size to accurately adapt to special installation environments.
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Material Customization
Options include carbon steel, alloy steel, stainless steel (A2/A4), duplex steel, or specified materials as required by the project.
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Strength Grade Customization
Multiple strength grades available (4.8, 8.8, 10.9, 12.9, etc.), suitable for heavy-duty structures and high-stress scenarios.
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Thread Type Customization
Capable of producing various thread types such as full thread, partial thread, American standard UNC/UNF threads and special-shaped threads.
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Surface Treatment Customization
Customizable surface treatments including galvanizing, hot-dip galvanizing, Dacromet, zinc-nickel alloy, black oxide, phosphating and special corrosion-resistant coatings to meet different protection needs.
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Special Environment Requirements
Customizable high-temperature bolts, corrosion-resistant bolts for marine engineering, chemical-resistant bolts, etc., adaptable to extreme working conditions.
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OEM Brand Services
Provide a full set of OEM brand services including customized packaging, labels, barcodes, product marking and Private Label.
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Bulk Customization for Engineering Projects
The factory has strong bulk customization capabilities, with stable delivery time and a strict quality control system, fully ensuring efficient project delivery.
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Hex Bolt Wholesale & Bulk Supply
We specialize in providing bulk hex bolt supply services for industrial purchasers, distributors, and trading enterprises worldwide. Whether your project requires hundreds or hundreds of thousands of units, we consistently ensure stable product quality, highly competitive pricing, and accurate on-time delivery, fully meeting the core demands of industrial-scale bulk procurement.
Core Competitive Advantages:
- Flexible minimum order quantity (MOQ) policy, adapting to procurement needs of various scales
- Customized packaging solutions, compliant with cross-border and warehousing standards
- Efficient logistics and distribution system, covering key industrial regions globally
- Strict and stable quality control, in line with international industrial standards
- End-to-end professional technical support, spanning selection, customization, and after-sales service
Contact us now to obtain an exclusive quote, and we will tailor a comprehensive bulk hex bolt solution for your industrial projects.
Our Hex Bolt Factory Overview & Certifications
Jinrui Hex Bolt Production Base is located in the core area of China's manufacturing industry, equipped with advanced cold heading/hot heading forming production lines, high-precision thread rolling equipment, professional heat treatment systems, and automated surface treatment process equipment. Through precision control throughout the entire production process, we ensure accurate dimensional tolerances and stable, reliable mechanical strength of products. The factory has fully obtained ISO 9001 quality management system certification and IATF 16949 automotive industry-specific certification, and can provide authoritative third-party factory audit reports upon customer request. Relying on standardized production processes and a strict quality control system, we continuously deliver high-quality hex bolt products that comply with international industrial standards to global customers.
Safe Packaging & Flexible Global Shipping
We deeply understand the core demands of industrial purchasers for the safety and timeliness of hex bolt transportation, and thus provide comprehensive customized packaging solutions, including rust-proof coated bags, standard cartons, palletized packaging, and exclusive tailored solutions for bulk orders. Through multi-layer protective design, we ensure products remain intact during long-distance transportation.
All packaging solutions fully comply with international transportation standards, with optional adaptable packaging forms such as cartons and wooden cases, which are fully compatible with mainstream transportation methods including sea freight and air freight. We offer flexible trade term options such as FOB, CIF, and DDP—prioritizing sea freight (a cost-optimized solution) for bulk orders and air freight (a timeliness-guaranteed solution) for urgent orders. Through multi-dimensional transportation configurations, we comprehensively ensure on-time order delivery.
In addition, we are equipped with a full-process order visual tracking system and a dedicated customer service team, synchronizing logistics dynamics in real time and responding to consultation needs promptly. This ensures your hex bolts are safe and controllable throughout the transportation process, ready for direct application in industrial production upon arrival, and helps improve the efficiency and quality of your procurement process.
Hex Bolt FAQ
Q: What is the minimum order quantity (MOQ) for hex bolts?
A: For standard in-stock hex bolts, the MOQ is generally 500-1000 units per specification. For large-scale industrial projects or customized hex bolts, we can flexibly negotiate and adjust based on your specific needs.
Q: Can hex bolts be customized?
A: Yes, we provide comprehensive customized hex bolt solutions, covering size, strength grade, material selection, surface treatment, and full-process OEM/ODM services. We especially welcome bulk customized orders and will offer professional consulting services tailored to your project.
Q: What is the lead time for hex bolt orders?
A: The lead time depends on the order quantity. Normally, standard in-stock orders can be produced and shipped within approximately 30 days. For customized orders, the lead time is usually 30-45 days based on specific specifications, materials, and order volume. We will make every effort to meet the needs of urgent projects.
Q: Can I request samples before placing a large order?
A: Yes, we can provide samples according to your requirements. The sample fee can be fully refunded or deducted from the corresponding payment after you confirm the bulk order.
Q: Is third-party factory audit or quality inspection available?
A: Of course. We warmly welcome customers or third-party institutions to conduct factory audits and quality inspections, and can provide a full set of compliant documents, including material certificates, test reports, and certifications that meet international standards. This helps you fully understand our production strength and quality control level, laying a foundation for in-depth cooperation.
Q: What factors affect the price of hex bolts?
A: The price of hex bolts is mainly affected by factors such as material type, strength grade, specification size, surface treatment process, order volume, and customization complexity. For bulk orders and long-term cooperation, we can provide more competitive tiered quotations.
Q: Which industries commonly use hex bolts?
A: Hex bolts are widely used in construction engineering, general machinery, automobile manufacturing, energy equipment, marine engineering, and infrastructure construction. We can provide customized solutions for standard application scenarios in different industries and special needs of heavy industry.
Q: How are hex bolts packaged for bulk shipments?
A: For bulk shipments, we default to a combined packaging of anti-rust bags + export standard cartons + pallet reinforcement. Meanwhile, we can provide personalized customized packaging solutions according to special project requirements or OEM packaging specifications.
Q: Do you provide international shipping? What transportation methods are available?
A: We provide global international shipping services, supporting mainstream methods such as sea freight and air freight. Trade terms can be flexibly selected from FOB, CIF, or DDP, ensuring the safe and on-time delivery of hex bolts to the destination.
We're professional hex bolt manufacturers and suppliers in China, specialized in providing high quality custom service. We warmly welcome you to wholesale high-grade hex bolt at competitive price from our factory.
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