Product
Product
Supplier
Search
Get Quote
730 people are quoting
Compact fastening is important when machinery and equipment require secure connections in areas with limited installation space. Our Black Internal Hex Head Carbon Steel Bolts feature a recessed hex drive and carbon steel construction, providing a practical fastening solution for machinery, equipment assemblies, fixtures, and industrial components.
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 according to required dimensions, thread specifications, material grades, surface treatment, and packaging.
| Item | Specification |
|---|---|
| Product Type | Internal Hex Head Bolt |
| Material | Carbon Steel |
| Head Type | Internal Hex / Socket Head |
| Drive | Hex Socket |
| Surface Finish | Black Finish |
| Thread | According to SKU / drawing |
| Diameter | According to SKU / drawing |
| Length | According to SKU / drawing |
| Strength Grade | According to confirmed specification |
| Thread Standard | According to project requirement |
| Application | Machinery & Industrial Assembly |
| Production | Standard / Custom |
| Packaging | Bulk / Customized |
Technical Note: Exact diameter, length, thread standard, strength grade, head dimensions, and black surface-treatment process should be confirmed against the specific drawing or purchase specification.
The recessed hex socket allows the bolt to be installed using an appropriate hex key or socket tool. This configuration is useful where external wrench clearance is limited.
Carbon steel provides a practical combination of strength, machinability, and cost efficiency for many industrial fastening applications. The appropriate grade should be selected according to the required mechanical performance.
The black finish provides a consistent appearance and can be selected according to the application's surface-protection and dimensional requirements. The exact treatment should be confirmed before production.
The internal hex configuration can be advantageous for machinery and equipment assemblies where surrounding components restrict access to conventional external hex heads.
Industrial Machinery
Suitable for fastening machine components, covers, brackets, housings, and mechanical assemblies.
Equipment Manufacturing
OEM equipment manufacturers can specify dimensions, thread requirements, strength grade, and surface treatment for production assembly.
Fixtures & Jigs
Useful for manufacturing fixtures where compact fastening and accessible internal-hex installation are required.
Mechanical Components
Applicable to compatible assemblies requiring a recessed drive and carbon steel fastening solution.
MRO & Replacement
Distributors and maintenance teams can source replacement bolts according to existing equipment dimensions and technical specifications.
For industrial wholesalers, distributors, and fastener stockists, we support repeat procurement based on confirmed dimensions, material grades, surface treatment, packaging, and delivery requirements.
For machinery production, engineering projects, and maintenance programs, bulk quantities can be supplied according to confirmed specifications and purchasing schedules.
For OEM and non-standard applications, we can manufacture according to customer drawings, samples, thread specifications, dimensions, strength requirements, 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
Material selection
Turning and machining
Thread processing
Surface finishing
Sample and prototype production
Small-batch and volume production
Customized packaging
For an accurate quotation, please provide the diameter, length, thread standard, material grade, strength class, head dimensions, surface treatment, quantity, and drawing if available.
1. Engineering-Oriented Manufacturing
Our product range covers bolts, nuts, anchors, flanges, valves, 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, simplifying 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 support consistent international orders and repeat procurement.
For broader industrial fastening and piping requirements, explore our Stainless Steel Products, Stainless Steel Flange, and Industrial Valve ranges.
Q1: What is an internal hex head bolt used for?
It is commonly used for machinery and equipment assemblies where a recessed hex drive is preferred, especially when external wrench clearance is limited.
Q2: What does the black finish mean?
“Black finish” describes the appearance or surface treatment but does not identify one specific process. The exact treatment should be confirmed according to the required corrosion resistance, dimensional tolerance, and application.
Q3: Can these carbon steel bolts be customized?
Yes. Diameter, length, thread, material grade, strength class, head dimensions, surface treatment, and packaging can be customized according to confirmed drawings or specifications.
Looking for Black Internal Hex Head Carbon Steel Bolts for machinery, OEM equipment, MRO replacement, or global distribution?
Send me your drawing, dimensions, thread specification, material grade, surface-treatment requirement, and quantity. I will help confirm the configuration and prepare a suitable B2B quotation.
If you are interested in the product, contact 2bvideo.com for more information for more information
The information of 2bvideo.com limited shown above is provided by the user or collected on the network. Video 2B does not guarantee the authenticity,accuracy and legitimacy of 2bvideo.com limited information. Video 2B does not involve legal relationships and disputes between users arising from transactions other than secured transactions on this website. Disputes shall be settled by you through negotiation. If you are the person in charge or relevant employee of this enterprise, if you find that the enterprise information is incorrect or want to manage thiscompany, please contact us jacklee1558@gmail.com, after you claim the enterprise, you can obtain management permission, publish supplyand demand information, bring consulting orders, and remove page advertisements.
Main Product:
Steel Pipes and Tubes,
Stainless Steel Flange,
Stainless Steel Valve,
Pipe Fittings,
Stainless Steel Products ,
Sealing and Gaskets
