What Are Hex Flange Bolts?
Hex flange bolts are engineered for secure and cost-effective fastening, offering strength, stability and faster assembly in industrial applications.
Hex flange bolts are high-performance fasteners with an integrated flange under the head, acting like a built-in washer to distribute loads more evenly and improve connection stability. Compared with standard hex bolts, they eliminate the need for separate washers, making them an ideal choice for bulk assembly and industrial applications.

01
Lower Assembly Costs
Eliminates the need for separate washers, reducing material and labor costs in mass production.
02
Improved Connection Reliability
Better load distribution minimizes the risk of loosening and extends the service life of the connection.
03
Faster Installation Efficiency
The simplified fastening process helps boost productivity, especially in OEM manufacturing environments.
04
Wide Application & Strong Compatibility
Suitable for a variety of materials and structures, including metals, mechanical components and structural assemblies.
Hex Flange Bolts Product Range
Browse Available Hex Flange Bolt Sizes, Grades, and Finishes for Wholesale Orders
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Hex Flange Bolt Specifications & Standards: Meet Your Bulk Procurement Needs
We supply hex flange bolts in a full range of sizes, materials and strength grades, strictly complying with international standards such as DIN and ISO. With stable supply capacity and standardized production, we can fully meet your various industrial application and bulk procurement needs, solving your core concerns of "whether the required specifications are available" and "whether stable supply can be guaranteed".
Comprehensive Specifications, Covering All Application Scenarios
Our hex flange bolts are manufactured in strict accordance with widely recognized international standards such as DIN 6921 and ISO 4162, ensuring perfect compatibility with global industrial equipment and assembly requirements, and avoiding mismatches in procurement and use.
Diversified Materials & Strength Grades, Adapt to Different Working Conditions
We provide targeted solutions for various industries: from cost-effective carbon steel for general industrial scenarios, to corrosion-resistant stainless steel (304, 316) for harsh environments such as humidity and corrosion, and multiple strength grades to match different load-bearing requirements, fully meeting your differentiated procurement needs.
Professional Surface Treatment, Enhance Product Durability
To adapt to different operating environments, we offer a variety of professional surface treatment processes for hex flange bolts. These treatments not only improve the corrosion resistance and service life of the bolts, but also optimize their appearance, ensuring long-term stable operation in various complex working conditions.
Stable Supply Capacity, Support Bulk Procurement
We have mature production lines and sufficient inventory reserves, which can stably supply large quantities of hex flange bolts of various specifications. We strictly control the production quality and delivery cycle, ensuring that your procurement plan is not delayed and your production progress is guaranteed.
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Parameter Item |
Detailed Description |
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Executive Standard |
DIN 6921, ISO 4162 and other standards(fully compliant with international standards, ensuring compatibility) |
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Size Range |
Metric: M5 – M36 (customizable according to your specific procurement requirements) |
|
Thread Type |
Metric coarse thread / fine thread (optional according to application scenarios) |
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Strength Grade |
8.8, 10.9, 12.9 (covering light, medium and heavy load-bearing needs) |
|
Material |
Carbon steel (cost-effective, suitable for general industry), stainless steel (304, 316, corrosion-resistant, suitable for harsh environments)and other materials |
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Surface Treatment |
Surface treatments such as galvanizing, blackening, hot-dip galvanizing, etc (improve corrosion resistance and durability) |
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Head Type |
Hex flange head (toothed / toothless, optional according to anti-loosening requirements) |
Types of Hex Flange Bolts We Supply
Our hex flange bolts come in a full range of types, precisely engineered to meet diverse industrial requirements — including outstanding anti-loosening performance, excellent corrosion resistance, and reliable high strength for both bulk supply and OEM projects.









Produced in strict compliance with international and national standards such as GB, DIN, ISO, JIS and ASME, we also provide comprehensive non-standard customization services tailored to your project-specific needs. Every batch undergoes rigorous core performance testing covering strength, durability and dimensional accuracy, paired with diversified surface treatment options to precisely adapt to various working conditions and environmental demands.
Please feel free to contact us anytime if you have any inquiries or specific requirements.
Applications of Hex Flange Bolts Across Industries
Hex flange bolts are widely used in industries requiring secure, vibration-resistant, and efficient fastening solutions, especially in high-volume and load-bearing applications.

Automotive Industry
Hex flange bolts are widely used in vehicle assembly, including critical systems such as engines, chassis and transmissions, providing stable and vibration-resistant fastening.

Construction & Structural Applications
In construction and steel structures, flange bolts deliver reliable connections, optimize load distribution, and reduce the need for additional washers.

Machinery Manufacturing
Used in the assembly of industrial machinery and equipment, where efficiency and consistency are essential for mass production.

Heavy Equipment & Engineering
Suitable for heavy-duty equipment and engineering applications that require high-strength fasteners to withstand harsh operating conditions.
Why Choose Our Hex Flange Bolt Factory
In the field of hex flange bolt procurement, choosing a reliable, professional and competitive supplier is crucial to ensuring the smooth progress of projects, controlling procurement costs, and ensuring product compliance and compliance with standards. With more than 20 years of in-depth industry experience and full-chain core advantages, we have become the preferred partner for distributors, wholesalers and various B-end purchasers around the world. The core reasons are as follows:
More than 20 Years of Professional Accumulation, Double Guarantee of Quality and Experience
We have more than 20 years of specialized manufacturing experience in hex flange bolts, serving global customers for a long time, and have accumulated mature production processes and rich industry experience. Different from ordinary manufacturers, we have a deep understanding of the production details, material adaptation and performance requirements of hex flange bolts. From raw material selection to finished product delivery, every link adheres to mature standards to ensure the stable quality and reliable performance of each batch of products, fundamentally reducing procurement risks and avoiding project progress delays caused by product quality problems.
Advanced Production Capacity Configuration, Easily Undertake Large-Volume Orders
Strong manufacturing capacity is the core confidence for us to ensure supply. The factory is equipped with a full set of cutting-edge automated production equipment, including automated cold heading/hot heading production lines, high-precision CNC thread rolling machines and professional heat treatment equipment, strictly following international production standards to achieve standardization and high efficiency of the entire production process. Whether it is large-volume regular orders or long-term stable supply needs, we can ensure that the output meets the standards and the supply is stable with our stable production lines and sufficient production capacity reserves, completely solving the purchasers' worries of "insufficient production capacity and delayed delivery".
Strict Full-Process Quality Control, Compliance and Traceability
We always put product quality first, established a complete full-process quality control system, and equipped with a professional testing laboratory and a full set of advanced testing equipment. Each batch of hex flange bolts must pass multi-dimensional strict tests, including material composition verification, dimensional accuracy calibration, torque and tensile testing, salt spray and corrosion resistance testing, etc., to ensure that the products fully meet international standards and customers' performance requirements. For large-volume orders, we can also provide authoritative third-party quality inspection reports according to customer needs, realizing product quality traceability and making procurement more assured.
Flexible Customization Services to Adapt to Various Differentiated Needs
We deeply understand that different projects have different requirements for the specifications and performance of hex flange bolts, so we provide comprehensive OEM/ODM customization solutions. Whether it is according to the drawings, samples provided by customers, or special requirements for dimensions, strength grades, surface treatments and packaging, we can provide full-chain customization services - from specification design, process adjustment to mass production, tailor-made exclusive solutions, which can not only meet the needs of standard fasteners, but also adapt to the customization of non-standard special-shaped parts, flexibly responding to the personalized procurement needs of various projects.
Factory Direct Supply with Competitive Prices, Greatly Reducing Procurement Costs
As a source manufacturer, we adopt the "factory direct supply" model, eliminating all intermediate circulation links, minimizing intermediate costs, and providing highly competitive factory wholesale prices for large-volume orders. Compared with purchasing from distributors and agents, choosing us allows you to directly enjoy the benefits from the source. On the premise of ensuring stable product quality and supply, it effectively reduces procurement costs, improves procurement cost performance, and helps purchasers achieve cost optimization.
Reliable Delivery and Full-Process Services, More Efficient and Worry-Free Procurement
We pay attention to the experience of every procurement link. Through refined production planning and professional logistics coordination, we ensure the timely delivery of orders, strictly control the delivery cycle, and avoid project progress delays caused by delays. At the same time, we provide comprehensive B2B full-process supporting services, from pre-sales technical selection consultation and order planning optimization, to in-sales production progress communication and quality feedback, and then to after-sales follow-up support. The professional team provides full escort to ensure that every link from initial consultation to project delivery is efficient and smooth, making procurement more worry-free and assured.
In summary, with the core advantages of "rich experience, strong production capacity, strict quality control, flexible customization, competitive prices and stable services", we provide global customers with stable, high-quality hex flange bolts and comprehensive procurement solutions. Whether it is bulk purchasing, long-term supply, or customized project needs, we are your trustworthy long-term partner.
Custom & OEM Hex Flange Bolt Solutions
As a leading hex bolt manufacturer in China, we provide comprehensive custom and OEM hex flange bolt services for global buyers, fully supporting OEM/ODM projects to precisely meet various project-specific requirements. Our flexible customization covers multiple aspects:
Size
Customizable length, diameter, thread pitch, head size and other full-dimensional parameters, including non-standard specifications.
Material: Optional carbon steel (Grade 4.8/8.8/10.9/12.9), stainless steel (A2/A4, 304/316), alloy steel, duplex steel or project-specified materials.
01
Material
Optional carbon steel (Grade 4.8/8.8/10.9/12.9), stainless steel (A2/A4, 304/316), alloy steel, duplex steel or project-specified materials.
02
Strength Grade
Multiple options such as 4.8, 8.8, 10.9, 12.9, suitable for heavy-duty and high-stress scenarios.
03
Surface Treatment
Galvanizing, hot-dip galvanizing, Dacromet, zinc-nickel alloy, black oxide, phosphating and special corrosion-resistant coatings.
04
Others
Thread type (full thread, partial thread, UNC/UNF, etc.), serrated/non-serrated flange design, special environment-adapted bolts (high-temperature, marine, chemical-resistant), as well as OEM brand services (custom packaging, labels, private label).
05
We support production based on DIN/ISO standards, customer 2D/3D drawings or samples. Custom process:
| Submit drawings/specifications | Engineering evaluation and quotation | Sample production (if needed) | Mass production | Quality inspection and delivery |

Get Custom Hex Flange Bolts for Your Project
Send us your drawings or technical requirements today.
Our engineering team will provide a fast quotation and professional support for your bulk order.
FAQ
1. What is the minimum order quantity (MOQ) for hex flange bolts?
For standard in-stock hex flange bolts, the MOQ is generally 500-1000 units per specification. For customized bolts or large-scale industrial projects, we can flexibly negotiate and adjust the MOQ according to your specific needs.
2. Can hex flange bolts be customized?
Yes, we provide comprehensive customization services for hex flange bolts, covering size, strength grade, material selection, surface treatment and other aspects, and fully support OEM/ODM projects to meet your project-specific requirements.
3. What is the lead time for hex flange bolt orders?
The lead time varies with the order quantity and type. Normally, standard in-stock orders can be produced and shipped within about 30 days. For customized orders, the lead time is usually 30-45 days, depending on the specific specifications, materials and order volume. We will try our best to meet the needs of urgent projects.
4. Can I request samples before placing a large order?
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.
5. Is third-party factory audit or quality inspection available?
Of course. We welcome customers or third-party institutions to conduct factory audits and quality inspections, and can provide a full set of compliant documents to ensure you understand our production strength and quality control level.
6. What factors affect the price of hex flange bolts?
The price is mainly affected by material type, strength grade, specification size, surface treatment process, order volume and customization complexity. We provide more competitive tiered quotations for bulk orders and long-term cooperation.
7. Which industries commonly use hex flange bolts?
Hex flange bolts are widely used in construction engineering, general machinery, automobile manufacturing, energy equipment, marine engineering and infrastructure construction. We can provide customized solutions for different industry needs.
8. How are hex flange bolts packaged for bulk shipments?
For bulk shipments, we adopt anti-rust bags + export standard cartons + pallet reinforcement. We also provide personalized customized packaging according to special project or OEM requirements.
9. Do you provide international shipping? What transportation methods are available?
We provide global international shipping services, supporting sea freight and air freight. Trade terms can be flexibly selected from FOB, CIF or DDP to ensure safe and on-time delivery.
10. What after-sales support is provided?
We offer comprehensive after-sales guarantees, including product technical guidance, free replacement of unqualified products, and consulting services for long-term bulk order cooperation plans.
11. Do hex flange bolts need extra washers?
Usually not. Hex flange bolts have their own flange surface, which can disperse the stress. However, washers can be used as needed in special structures or high-demand scenarios.
12. How to choose serrated and non-serrated flange bolts?
Serrated flange bolts are suitable for vibrating environments with better anti-loosening performance; non-serrated ones are more suitable for application scenarios requiring contact surface protection.
Get A Quote For Hex Flange Bolts
We deeply understand the core demands of industrial purchasers for the safety and timeliness of hex flange 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 flange 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.
Whether you need hex flange bolts complying with DIN 6921 standard or fully customized solutions, our team is ready to support your project. We provide accurate quotes based on your specifications, drawings or application needs, with advantages of flexible customization, competitive factory prices for bulk orders, and stable on-time delivery—contact us now to get your factory quote.
We're professional hex flange bolt manufacturers and suppliers in China, specialized in providing high quality custom service. We warmly welcome you to wholesale high-grade hex flange bolt at competitive price from our factory.
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