DIN933 Black Oxide Stainless Steel Hex Bolt
DIN933 black oxide stainless steel hex bolt is a premium full-thread fastening solution designed for applications requiring excellent corrosion resistance, enhanced surface appearance, and reliable mechanical performance. The DIN933 black oxide stainless steel hex bolt is manufactured according to the DIN933 standard and features a fully threaded shank with a hexagonal head for secure installation and maximum thread engagement.
Unlike conventional natural stainless steel fasteners, the DIN933 black oxide stainless steel hex bolt undergoes a specialized black oxidation treatment that produces a uniform matte black finish while maintaining the inherent corrosion resistance of stainless steel. It is widely used in architectural hardware, automation equipment, high-end machinery, electronic equipment, automotive components, renewable energy systems, and OEM manufacturing where both aesthetics and durability are important.
Product Overview
The DIN933 black oxide stainless steel hex bolt is engineered to provide reliable fastening performance in demanding industrial and commercial environments. Its full-thread design maximizes thread engagement, making it suitable for structural connections, mechanical assemblies, and precision equipment.
Manufactured from premium stainless steel such as 304, 316, 304L, or 316L, this DIN933 black oxide stainless steel hex bolt combines excellent corrosion resistance with an attractive low-reflective black finish. The black oxide treatment also helps improve wear resistance and reduces glare, making it suitable for visible installations and high-end equipment.
As a premium stainless steel hex bolt, it is widely used as one of the preferred industrial fasteners for OEM fasteners, machinery manufacturers, and engineering contractors.
Product Specifications
| Item | Description |
|---|---|
| Standard | DIN933 |
| Product Name | DIN933 Black Oxide Stainless Steel Hex Bolt |
| Material | Stainless Steel 304 / 304L / 316 / 316L |
| Thread Type | Metric Full Thread |
| Head Type | Hex Head |
| Drive Type | External Hex |
| Diameter Range | M4–M64 |
| Length Range | 8mm–300mm |
| Surface Finish | Black Oxide Stainless Steel |
| Strength Grade | A2-70 / A4-70 / A4-80 |
| Thread Direction | Right Hand |
| Packaging | Carton, Poly Bag, Pallet, OEM Packaging |
| Customization | Size, thread, material, black finish, head marking, packaging |
Technical Parameters
| Parameter | Value |
|---|---|
| Tensile Strength | ≥700 MPa (A2-70) / ≥800 MPa (A4-80) |
| Yield Strength | ≥450 MPa |
| Hardness | HV 200–250 |
| Density | 7.93–8.00 g/cm³ |
| Corrosion Resistance | Excellent |
| Operating Temperature | -196°C to 400°C |
| Thread Tolerance | 6g |
| Manufacturing Standard | DIN933 / ISO 4017 |
Materials and Manufacturing Process
The DIN933 black oxide stainless steel hex bolt is manufactured using advanced precision production technology to ensure excellent dimensional accuracy, stable mechanical properties, and consistent surface quality.
- Premium stainless steel raw material selection (304, 304L, 316, or 316L)
- Cold heading for precision hex head formation
- Hot forging for large-diameter bolts when applicable
- CNC machining for customized dimensions and special requirements
- Precision thread rolling to improve fatigue resistance and thread accuracy
- Solution treatment when required
- Stainless steel black oxidation treatment for a uniform matte black finish
- Surface cleaning and passivation to optimize corrosion resistance
- Comprehensive dimensional, thread, hardness, and appearance inspections
- Export-grade packaging for global transportation
Every DIN933 black oxide stainless steel hex bolt is manufactured under strict ISO quality management procedures to ensure consistent quality and long-term industrial performance.
Applications of the Product
DIN933 black oxide stainless steel hex bolts are widely used in:
- Construction and architectural projects
- Industrial machinery
- Automotive equipment
- Renewable energy systems
- Petrochemical facilities
- Marine engineering
- Food processing equipment
- Industrial equipment
- Manufacturing systems
- Electronic equipment
- Automation systems
- OEM engineering projects
The elegant black finish makes this black oxide stainless steel hex bolt particularly suitable for premium equipment and visible fastening applications.
Why Choose This Product
- Premium stainless steel raw material
- Manufactured according to DIN933 international standard
- Attractive black oxide finish
- Excellent corrosion resistance
- Full-thread design for maximum fastening flexibility
- High precision manufacturing
- Stable mechanical performance
- Long service life
- Bulk supply capability
- OEM and ODM customization support
- Fast global delivery
The DIN933 black oxide stainless steel hex bolt offers an excellent combination of appearance, durability, and reliable fastening performance.
Why Choose Flybear
Flybear is a professional manufacturer specializing in precision industrial fasteners and customized fastening solutions.
Our advantages include:
- Advanced cold heading, thread rolling, and CNC machining equipment
- Professional stainless steel black surface treatment technology
- Strong manufacturing capacity and inventory support
- OEM and ODM production based on drawings and specifications
- Professional engineering consultation
- Strict ISO quality management system
- Extensive export experience
- Fast delivery and comprehensive technical support
Flybear supplies high-quality fastening solutions for OEM manufacturers, EPC contractors, distributors, and industrial buyers around the world.
Quality Inspection and Control
Every production batch undergoes comprehensive inspection, including:
- Chemical composition analysis
- Tensile strength testing
- Hardness testing
- Salt spray corrosion testing
- Thread gauge inspection
- Dimensional inspection
- Surface finish and color consistency inspection
- Black oxide coating inspection
- Packaging inspection
All manufacturing processes comply with ISO quality management standards to ensure stable product quality and reliable industrial performance.
Selection Guide
When selecting a DIN933 black oxide stainless steel hex bolt, consider:
- Stainless steel material (304, 304L, 316, or 316L)
- Bolt diameter and length
- Required strength grade
- Indoor or outdoor operating environment
- Corrosion exposure level
- Surface appearance requirements
- Matching nuts and washers
- Applicable engineering standards
Choosing the correct specification ensures optimal fastening performance and service life.
FAQ
1. What is DIN933?
DIN933 is the international standard for fully threaded hex head bolts.
2. What is the purpose of the black oxide finish on stainless steel?
The black oxide finish provides a uniform black appearance, reduces glare, improves surface aesthetics, and maintains the corrosion resistance of stainless steel.
3. Is black oxide stainless steel corrosion resistant?
Yes. The corrosion resistance primarily comes from the stainless steel material, while the black surface treatment enhances appearance and surface performance.
4. Can custom sizes and finishes be produced?
Yes. Flybear offers OEM and ODM production for customized dimensions, stainless steel grades, surface finishes, markings, and packaging.
5. How can I request a quotation?
Please provide the required dimensions, material grade, quantity, drawings (if available), and application requirements for a detailed quotation.
The DIN933 black oxide stainless steel hex bolt combines excellent corrosion resistance, premium appearance, and precision manufacturing, making it an ideal fastening solution for industrial, architectural, and OEM applications.
We always adhere to the philosophy of quality first and customer first, providing customers with high-quality fastener products and one-stop fastener solutions.
For quotations, customization, and technical support, please Contact Us.
