Custom 304 Stainless Steel Internal Hex Flat Head Machine Screw
Custom 304 Stainless Steel Internal Hex Flat Head Machine Screw
The Custom 304 Stainless Steel Internal Hex Flat Head Machine Screw is a precision-engineered fastening solution widely used in mechanical assemblies requiring flush surface installation, high corrosion resistance, and stable clamping force. As a core type of industrial fasteners, this flat head machine screw is designed to sit flush with the mounting surface, improving both aesthetics and functional safety in engineered systems.
Manufactured from high-quality 304 stainless steel (A2 grade), this screw delivers excellent resistance to rust, oxidation, and chemical exposure. It is widely applied in machinery equipment, automation systems, electronics, and OEM structural assemblies where reliable stainless steel fasteners are required.
Flybear specializes in producing customized fastening components for global industrial buyers, offering stable quality and flexible OEM manufacturing capability.
Product Overview
The Custom 304 Stainless Steel Internal Hex Flat Head Machine Screw features a countersunk flat head combined with an internal hex drive. This design allows the screw to be fully embedded into pre-machined countersunk holes, ensuring a smooth and flush surface finish.
Compared with pan head or round head screws, the flat head design reduces protrusion, making it suitable for compact assemblies and precision equipment. The internal hex drive improves torque transmission, reduces cam-out risk, and supports high-precision installation.
The use of 304 stainless steel ensures strong performance in humid, outdoor, and mildly corrosive environments, making it a preferred choice for long-term industrial applications.
Product Specifications
| Item | Description |
|---|---|
| Product Name | Custom 304 Stainless Steel Internal Hex Flat Head Machine Screw |
| Material | 304 Stainless Steel (A2-70) |
| Thread Type | Metric Machine Thread |
| Head Type | Flat Head (Countersunk) |
| Drive Type | Internal Hex Socket |
| Diameter Range | M2 – M20 |
| Length Range | 4 mm – 100 mm |
| Surface Finish | Natural Stainless Steel |
| Strength Grade | A2-70 |
| Thread Direction | Right Hand |
| Standard | DIN / ISO Equivalent / Custom |
| Packaging | Bulk / Small Box / OEM Packaging |
| Customization | Size, head angle, marking available |
Technical Parameters
| Parameter | Value |
|---|---|
| Tensile Strength | ≥ 700 MPa |
| Yield Strength | ≥ 450 MPa |
| Hardness | ≤ 200 HV |
| Density | 7.93 g/cm³ |
| Corrosion Resistance | High (304 stainless steel) |
| Operating Temperature | -50°C to 300°C |
| Thread Tolerance | ISO Metric Standard |
| Manufacturing Standard | DIN / ISO / Custom Engineering |
Materials and Manufacturing Process
The Custom 304 Stainless Steel Internal Hex Flat Head Machine Screw is manufactured through a controlled precision process to ensure dimensional accuracy and mechanical reliability.
- Raw material selection: High-grade 304 stainless steel wire or bar
- Cold heading: Initial formation of flat head structure
- Thread rolling: Improves strength and fatigue resistance
- Countersink angle forming: Ensures flush installation fit
- CNC machining: Precision shaping of internal hex socket
- Heat treatment (if required): Enhances mechanical stability
- Surface passivation: Improves corrosion resistance
- Cleaning: Removes contaminants for clean assembly
- Inspection: Dimensional, torque, and surface quality testing
- Packaging: Anti-corrosion and export-grade packaging
This process ensures consistent quality in demanding industrial fasteners applications.
Applications of the Product
The 304 stainless steel flat head machine screw is widely used in industries requiring flush installation and corrosion resistance:
- Machinery: Equipment covers and structural assemblies
- Automotive: Interior and exterior fastening systems
- Electronics: Enclosures and precision devices
- Construction: Metal panel fastening systems
- Renewable Energy: Solar mounting structures
- Marine: Corrosion-exposed assemblies
- Industrial equipment: Automation and production machinery
- OEM manufacturing: Customized assembly systems
It is commonly used with hex head bolt, DIN933 bolt, and other metric bolt systems in integrated fastening solutions.
Why Choose This Product
- Flush installation with countersunk flat head design
- High corrosion resistance with 304 stainless steel
- Strong torque transmission via internal hex drive
- Suitable for precision and compact assemblies
- Long service life in harsh environments
- Compatible with global metric fastening systems
- OEM customization available for industrial needs
- Stable performance under vibration and load
- Export-ready packaging and bulk supply capability
Why Choose Flybear
Flybear is a professional manufacturer of precision fastening systems, providing reliable OEM and industrial-grade solutions for global customers.
- Advanced cold forming and CNC machining capability
- Strong OEM/ODM customization support
- Stable mass production capacity
- Engineering technical consultation services
- Global supply experience in industrial fasteners
- Strict quality control and inspection systems
Flybear focuses on delivering durable and precise fastening solutions for engineering and manufacturing industries worldwide.
Quality Inspection and Control
Each batch of the 304 stainless steel flat head machine screw undergoes strict quality control:
- Chemical composition analysis
- Tensile strength testing
- Hardness testing
- Torque performance testing
- Thread gauge inspection
- Dimensional accuracy inspection
- Surface passivation quality check
- Packaging integrity inspection
All products comply with ISO quality management standards for consistent reliability.
Selection Guide
When selecting the correct flat head screw, consider:
- Material grade (304, 316, carbon steel)
- Countersink angle compatibility
- Thread size and length
- Load and torque requirements
- Environmental corrosion level
- Assembly space constraints
Proper selection ensures secure fastening and flush installation performance.
FAQ
1. What is a flat head machine screw used for?
It is used for flush installation where a smooth surface is required.
2. Is 304 stainless steel suitable for outdoor use?
Yes, it offers strong corrosion resistance for most outdoor environments.
3. What is the advantage of internal hex drive?
It provides higher torque and reduces stripping risk.
4. Can custom sizes be produced?
Yes, Flybear supports full OEM customization.
5. Where is this screw commonly used?
It is widely used in machinery, electronics, and OEM assemblies.
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 quotation, customization, and technical support, please Contact Us.
