PEEK Socket Countersunk Screw DIN7991
PEEK socket countersunk screw DIN7991 is a high-performance engineering plastic fastener designed for precision assemblies requiring flush surface installation, high-temperature resistance, and excellent electrical insulation. The PEEK socket countersunk screw DIN7991 is manufactured from polyether ether ketone (PEEK), a premium thermoplastic known for outstanding mechanical stability, chemical resistance, and long-term reliability in demanding environments.
The PEEK socket countersunk screw DIN7991 features a 90° flat head combined with an internal hex (Allen) drive, allowing high torque installation while maintaining a completely flush surface after tightening. It is widely used in semiconductor equipment, aerospace systems, medical devices, and advanced electronic assemblies where metal fasteners may cause corrosion, conductivity, or weight issues.
Product Overview
The PEEK socket countersunk screw DIN7991 is engineered for applications requiring both mechanical strength and surface-level precision. Its countersunk head ensures the screw sits flush with the material surface, improving safety, aerodynamics, and assembly aesthetics.
This PEEK socket countersunk screw DIN7991 performs exceptionally well in chemically aggressive environments, high-temperature conditions, and electrically sensitive systems. Unlike metal fasteners, it eliminates risks of rust, galvanic corrosion, and electromagnetic interference.
As a specialized industrial fastener, it is widely used in OEM manufacturing where lightweight structure, dimensional stability, and material purity are critical requirements.
Product Specifications
| Item | Description |
|---|---|
| Product Name | PEEK Socket Countersunk Screw DIN7991 |
| Standard | DIN7991 |
| Material | PEEK (Polyether Ether Ketone) |
| Head Type | Countersunk (Flat Head 90°) |
| Drive Type | Internal Hex (Allen) |
| Thread Type | Metric / Custom |
| Diameter Range | M2–M12 |
| Length Range | 4mm–80mm |
| Color | Natural Beige / Black (optional) |
| Density | ~1.30 g/cm³ |
| Operating Temperature | -50°C to 260°C |
| Electrical Properties | Excellent insulation |
| Chemical Resistance | Excellent resistance to acids, solvents, oils |
| Packaging | Anti-static bag / carton / OEM packaging |
| Customization | Size, drive type, color available |
Technical Parameters
| Parameter | Value |
|---|---|
| Tensile Strength | ~90–100 MPa |
| Flexural Strength | ~140–160 MPa |
| Hardness | Shore D 85–88 |
| Continuous Service Temperature | Up to 260°C |
| Melting Point | ~343°C |
| Dielectric Strength | High insulation performance |
| Water Absorption | <0.1% |
| Chemical Resistance | Strong resistance to acids, bases, solvents |
Materials and Manufacturing Process
The PEEK socket countersunk screw DIN7991 is manufactured using advanced polymer processing techniques to ensure high dimensional accuracy and stable performance.
- Raw material selection: High-purity PEEK resin
- Injection molding / CNC machining: Formation of countersunk head geometry
- Thread forming: Precision molded or machined threads
- Internal hex machining: High-precision Allen drive formation
- Annealing treatment: Improves dimensional stability
- Surface finishing: Optional polishing for precision applications
- Inspection: Dimensional and mechanical performance testing
- Cleaning: Contamination-free processing for sensitive industries
- Packaging: Anti-static and moisture-protected packaging
Each PEEK socket countersunk screw DIN7991 is produced under strict quality control standards to ensure consistent industrial reliability.
Applications of the Product
The PEEK socket countersunk screw DIN7991 is widely used across advanced industrial sectors:
- Semiconductor equipment: Wafer processing and cleanroom systems
- Medical devices: Surgical instruments and diagnostic equipment
- Aerospace engineering: Lightweight structural assemblies
- Electronics industry: PCB mounting and enclosure fastening
- Chemical industry: Corrosion-resistant equipment systems
- Automation systems: Precision mechanical assemblies
- Laboratory equipment: Analytical instruments
- Marine engineering: Anti-corrosion fastening systems
Its flush design and insulation properties make it ideal for high-precision and high-reliability environments.
Why Choose This Product
- DIN7991 standard for global compatibility
- Excellent high-temperature resistance up to 260°C
- Superior chemical and corrosion resistance
- Flush countersunk design for smooth surfaces
- High torque capacity with internal hex drive
- Lightweight structure reduces system weight
- Outstanding electrical insulation performance
- Non-magnetic and non-conductive material
- OEM customization available
The PEEK socket countersunk screw DIN7991 provides a reliable fastening solution for advanced engineering systems requiring precision and durability.
Why Choose Flybear
Flybear specializes in manufacturing high-performance industrial fasteners and advanced polymer fastening components.
- Precision CNC machining and molding capabilities
- OEM/ODM customization support
- Stable production for industrial-scale supply
- Strict quality inspection and testing systems
- Global export experience
- Engineering consultation for application design
Flybear supports OEM manufacturers, distributors, and engineering companies with reliable fastening solutions.
Quality Inspection and Control
Quality assurance is strictly implemented throughout production:
- Raw material purity testing
- Dimensional accuracy inspection
- Tensile and flexural strength testing
- Thermal resistance verification
- Chemical resistance evaluation
- Thread and drive inspection
- Surface quality control
- Packaging integrity inspection
All processes follow ISO-based quality management systems to ensure consistent performance.
Selection Guide
When selecting a PEEK socket countersunk screw DIN7991, consider:
- Operating temperature requirements
- Chemical exposure conditions
- Required torque and load capacity
- Electrical insulation needs
- Thread size and length
- Assembly environment
Proper selection ensures long-term stability and optimal performance.
FAQ
1. What is DIN7991?
DIN7991 is a standard for socket countersunk head screws with internal hex drive and flush installation design.
2. What are PEEK screws used for?
They are used in high-performance environments requiring insulation, corrosion resistance, and lightweight design.
3. Can it replace metal countersunk screws?
Yes, especially in environments requiring non-conductive and corrosion-resistant fasteners.
4. Does PEEK conduct electricity?
No, PEEK is an excellent electrical insulator.
5. Can custom specifications be produced?
Yes, Flybear supports full customization of dimensions and designs.
We always adhere to the philosophy of quality first and customer first, providing customers with high-quality fastener products and one-stop fastener solutions.
Contact us for quotation, customization, and technical support via Contact Us.
