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Reliable flange fastening requires the right combination of strength, dimensional accuracy, thread compatibility, and surface protection. Our Carbon Steel Flange Hex Head Bolts Black Anodized are intended for industrial flange connections, machinery assembly, and equipment fastening where a flange-style hex head and specified black surface finish are required.
As Alisa, Export Director at Hanyang Machinery with 10 years of industrial equipment export experience, I work with global distributors, OEM buyers, engineering contractors, and industrial procurement teams. We support standard and drawing-based bolt production, helping buyers confirm material, dimensions, thread specifications, surface treatment, and packaging before production.
| Item | Specification |
|---|---|
| Product Type | Flange Hex Head Bolt |
| Material | Carbon Steel |
| Head Type | Hex Flange Head |
| Thread | According to SKU / drawing |
| Surface Finish | Black finish according to confirmed specification |
| Nominal Diameter | According to SKU / drawing |
| Length | According to SKU / drawing |
| Strength Grade | According to confirmed specification |
| Thread Standard | According to project requirement |
| Flange Diameter | According to product specification |
| Production | Standard / Custom |
| Packaging | Bulk / Customized |
Technical Note: Please confirm the exact black surface treatment before production. “Black anodized” is not a conventional treatment for carbon steel, so the required process should be verified against the original drawing or specification.
The flange-style head provides an enlarged bearing surface compared with a conventional hex head bolt. This can help distribute clamping force over a larger contact area when the application is properly designed.
Carbon steel offers a practical combination of strength, machinability, and cost efficiency for many industrial fastening applications. The required material grade and strength class should be confirmed according to the application.
The hexagonal head allows installation with common wrench or socket tools, making the bolt suitable for machinery assembly, equipment maintenance, and industrial fastening.
A black finish can provide the required appearance or surface characteristics for particular equipment and assembly applications. The exact coating or treatment should be selected according to corrosion, dimensional, and environmental requirements.
Industrial Machinery
Suitable for equipment assemblies where flange-head fastening is required for structural or component connections.
Flange & Pipeline Assemblies
Can be used with compatible flange connections when bolt dimensions, strength class, and environmental requirements are correctly matched.
Heavy Equipment
Applicable to machinery and equipment requiring robust carbon steel fastening components.
OEM Equipment Production
Equipment manufacturers can specify bolt diameter, length, thread, strength class, and surface treatment for production integration.
Maintenance & Replacement
Useful for distributors and MRO buyers sourcing replacement flange bolts according to existing equipment specifications.
For industrial wholesalers, distributors, and fastener stockists, we support repeat orders based on confirmed dimensions, material grades, surface treatment, packaging, and purchasing schedules.
For machinery production, construction, engineering projects, and maintenance programs, bulk quantities can be supplied according to confirmed technical specifications and delivery requirements.
For OEM and non-standard applications, we can manufacture according to customer drawings, samples, dimensions, thread requirements, strength class, and confirmed surface treatment.
Hanyang Machinery provides engineering-oriented manufacturing for industrial fasteners and components. Depending on the confirmed design, our capabilities include:
Drawing and dimensional review
Turning and precision machining
Threading
Drilling
Surface finishing
Material selection
Sample and prototype support
Small-batch and volume production
For an accurate quotation, please provide the diameter, length, thread standard, material grade, strength class, flange-head dimensions, surface treatment, quantity, and drawing if available.
1. Engineering-Oriented Manufacturing
Our capabilities cover bolts, nuts, valves, flanges, pipe fittings, steel pipes, sealing products, and custom-machined components.
2. One-Stop Industrial Supply
Global B2B buyers can source fastening and piping components through one industrial supply partner, helping simplify multi-category procurement.
3. Drawing-Based Customization
We support OEM and non-standard bolt production according to customer drawings, samples, technical specifications, and application requirements.
4. Quality & Delivery Control
Pre-shipment inspection and responsive technical communication help support consistent quality and reliable international order fulfillment.
For complete industrial fastening and piping procurement, explore our Stainless Steel Products, Stainless Steel Flange, and Industrial Valve ranges.
Q1: Can carbon steel flange bolts have a black surface finish?
Yes, carbon steel bolts can receive various black surface treatments. However, the term “black anodized” should be verified because conventional anodizing is generally associated with aluminum and other suitable non-ferrous materials.
Q2: Can these flange bolts be customized?
Yes. Diameter, length, thread, head dimensions, material grade, strength class, surface treatment, and packaging can be reviewed according to drawings or technical specifications.
Q3: What information is needed for a quotation?
Please provide the bolt size, length, thread standard, material grade, strength class, surface treatment, quantity, application, and drawing or sample if available.
Looking for Carbon Steel Flange Hex Head Bolts for OEM equipment, industrial machinery, flange assemblies, MRO replacement, or global distribution?
Send me your drawing, dimensions, material grade, thread specification, surface-treatment requirement, and quantity. I will help confirm the configuration and prepare a suitable B2B quotation.
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Main Product:
Steel Pipes and Tubes,
Stainless Steel Flange,
Stainless Steel Valve,
Pipe Fittings,
Stainless Steel Products,
Sealing and Gaskets
