Grade 12.9 High Strength Black Zinc Plated Extended Hex Bolts DIN 931 / DIN 933
These Grade 12.9 High Strength Extended Hex Bolts are designed for demanding fastening applications where higher load‑bearing performance and dependable connection strength are required.
The product is manufactured according to the DIN 931 / DIN 933 standard series and is available in different strength and material configurations based on the selected specification. Grade 12.9 is suitable for applications that require high tensile strength and strong resistance to mechanical stress.
The extended bolt design is useful for projects that require additional fastening length, deeper connection points, or flexible adjustment during assembly. The hexagonal head allows installers to use commonly available tools, helping improve installation efficiency and maintenance convenience.
The product page lists Grade 10.9 and Grade 12.9 options, with steel and stainless steel material selections available according to the order specification. Surface options include zinc‑plated and plain finishes, while the featured product style uses a black zinc plated appearance.
Main Product Advantages
- High strength performance for demanding industrial applications
- Grade 12.9 option for heavy‑duty fastening requirements
- DIN 931 / DIN 933 standard design
- Extended length options for deeper assembly positions
- Hex head structure for easy tightening with standard tools
- Steel and stainless steel material options
- Black zinc plated surface for a clean industrial appearance
- Suitable for OEM, wholesale, project, and engineering supply
- Custom logo and packaging services available for qualifying orders
Product Specifications
| Item | Specification |
|---|---|
| Product Type | Extended Hex Head Bolt |
| Applicable Standard | DIN 931 / DIN 933 |
| Available Strength Grades | Grade 10.9 / Grade 12.9 |
| Material Options | Steel / Stainless Steel |
| Featured Surface | Black Zinc Plated |
| Other Surface Option | Plain / Zinc Plated |
| Head Type | Hex Head |
| Available Thread Sizes | M4, M5, M6, M8, M10, M16, M18, M20, M22 and other customized sizes |
| Available Lengths | 20 mm, 35 mm, 45 mm, 65 mm, 75 mm and customized lengths |
| Brand | Hotop Fasteners |
| Origin | Handan, Hebei, China |
| Custom Logo MOQ | From 2 tons |
| Custom Packaging MOQ | From 2 tons |
Grade and Material Information
Grade 10.9
Grade 10.9 is suitable for industrial fastening applications that require good tensile strength and stable mechanical performance. It can be used for machinery, equipment, structural assembly, and general engineering projects.
Grade 12.9
Grade 12.9 is a higher strength class for more demanding fastening environments. It is commonly selected for high‑load mechanical assemblies, heavy equipment, machine components, and applications exposed to higher tightening or operating stress.
Steel Material
Steel is a practical choice for industrial fasteners because it offers good strength, machinability, and cost efficiency. It is widely used in machinery, construction, equipment manufacturing, and general hardware supply.
Stainless Steel Material
Stainless steel options can be selected for projects that require improved corrosion resistance or a different appearance. The exact stainless steel grade should be confirmed according to the project environment and purchase requirements.
Surface Treatment
Black Zinc Plated Finish
The black zinc plated finish creates a dark industrial appearance and can provide additional surface protection compared with an untreated surface. It is suitable for machinery, equipment, hardware, and general engineering applications where appearance and surface protection are both important.
Zinc Plated Finish
Zinc plating is commonly selected when buyers require a bright or protective metal surface for general industrial use.
Plain Finish
Plain finish options are suitable for applications where an untreated surface is preferred or where the customer plans to apply an additional coating or treatment after purchase.
DIN 931 / DIN 933 Standard
The product is offered under the DIN 931 / DIN 933 hex bolt standard series.
| Standard | Product Feature | Suitable Application |
|---|---|---|
| DIN 931 | Commonly associated with partially threaded hex bolts | Structural fastening and assemblies requiring an unthreaded shank |
| DIN 933 | Commonly associated with fully threaded hex bolts | Connections requiring thread engagement along the fastening length |
The exact thread length and dimensional configuration should be confirmed according to the selected DIN model, diameter, and bolt length.
Applications
These high strength extended hex bolts can be used in:
- Heavy machinery assembly
- Industrial equipment installation
- Steel structure connections
- Construction engineering
- Mechanical maintenance
- Agricultural machinery
- Automotive equipment
- Manufacturing equipment
- OEM component assembly
- Hardware wholesale and distribution
Customization and Packaging
Hotop Fasteners supports several customization options for qualified orders, including:
- Custom logo
- Custom packaging
- Customer‑supplied drawings
- Sample‑based customization
- Special size and length requirements
- Customized surface treatment
Packaging Options
Standard export packaging may include:
- Small bags or bulk bags
- Cartons
- Cartons with pallets
- Bags with pallets
- Customized packaging according to buyer requirements
Quality and Supply Support
Hotop Fasteners is based in Handan, Hebei, China, an important production area for industrial fasteners and engineering materials.
We support specification confirmation, bulk order coordination, packaging arrangement, and export supply for international buyers. Product documents, inspection information, and related export documents can be discussed according to the order requirements. The referenced page also states that production and delivery arrangements depend on quantity, specification, and final order confirmation.
FAQ
Q1: What product does Hotop Fasteners supply?
Hotop Fasteners supplies high strength DIN 931 / DIN 933 extended hex bolts for industrial, construction, machinery, and engineering applications.
Q2: What strength grades are available?
The listed options include Grade 10.9 and Grade 12.9.
Q3: Which grade should I choose for heavy‑duty use?
Grade 12.9 is generally selected for applications requiring higher tensile strength and stronger mechanical performance. The final grade should be matched to the engineering design and application requirements.
Q4: What materials are available?
The referenced product page lists steel and stainless steel material options. The exact material should be confirmed before order placement.
Q5: What surface treatments are available?
The page lists zinc plated and plain finishes, with the featured product described as black zinc plated.
Q6: What sizes are available?
Listed thread sizes include M4, M5, M6, M8, M10, M16, M18, M20, and M22, with additional sizes available for confirmation.
Q7: What lengths are available?
Listed lengths include 20 mm, 35 mm, 45 mm, 65 mm, and 75 mm. Customized lengths may be discussed according to the order requirements.
Q8: Can you provide customized packaging?
Yes. Custom packaging and logo services are available for qualifying bulk orders.
Q9: What is the minimum order quantity?
The referenced listing shows a minimum order quantity of 1 ton. Customized logo and packaging services are listed from 2 tons.
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Looking for Grade 10.9 or Grade 12.9 DIN 931 / DIN 933 extended hex bolts for industrial use?
Contact Hotop Fasteners for product specifications, material confirmation, size selection, surface treatment options, customized packaging, and bulk order quotations.
Send us your required grade, material, diameter, length, and quantity to receive a professional quotation.
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