Carbon Steel Hex Socket CSK Head Cap Screws
Product Overview
Hex Socket CSK Head Cap Screws are specialized fasteners designed for flush surface installations where aesthetics, torque control, and mechanical integrity are critical. Featuring a countersunk head with an internal hex drive, these screws are ideal for applications requiring concealed fastening and secure tightening. Manufactured from durable carbon steel, they offer high tensile strength, excellent machinability, and compatibility with multiple plating options for corrosion resistance.
Product Specifications
| Specification | Detail |
|---|---|
| Head Type | Countersunk (CSK) Head |
| Drive Type | Hex Socket (Allen) |
| Material | Carbon Steel |
| Thread Type | Full Thread / Partial Thread (optional) |
| Standards | DIN 7991 / ISO 10642 / ANSI B18.3 |
| Size Range | M3 – M24 / #6 – 1/2″ |
| Length Range | 6mm – 100mm / 1/4″ – 4″ |
| Surface Coating Options | Black Oxide, Zinc Plated, Nickel Plated |
Technical Parameters
| Parameter | Value |
|---|---|
| Tensile Strength | ≥ 800 MPa (Grade 8.8 Carbon Steel) |
| Thread Tolerance | ISO 6g / ANSI 2A |
| Head Angle | 90° Standard Countersink |
| Surface Hardness | Up to HV 420 after heat treatment |
| Corrosion Resistance | 96–240 hours salt spray (based on coating) |
Material & Production Process
Our Hex Socket CSK Head Cap Screws are manufactured from high-strength carbon steel, known for its excellent balance of mechanical performance and cost-effectiveness. The production process includes:
Cold forging and head shaping
CNC slotting and thread rolling
Heat treatment for strength and wear resistance
Surface finishing (zinc plating, black oxide, or nickel)
Final dimensional inspection and quality packaging
The result is a high-precision fastener suitable for both functional and decorative purposes.
Typical Applications and Use Cases
These screws are commonly used in environments where space-saving design and flush installation are crucial, including:
Machinery and automation systems
Aerospace and automotive interiors
Electrical panels and switchgear
Furniture and architectural hardware
Consumer electronics housings
Robotics and precision devices
Their countersunk heads reduce snagging and interference, making them ideal for streamlined, professional finishes.
Product Advantages & Competitive Edge
Carbon Steel Hex Socket CSK Head Cap Screws for Flush-Mount Precision
At Flybear, our fasteners are crafted for high performance and long-term durability.
High-Quality Material: Made from grade 8.8 carbon steel for superior strength
Precision Engineering: Hex socket ensures secure tightening with torque tools
Flush-Fit Design: Ideal for sleek and aerodynamic surface finishes
Corrosion Protection: Multiple plating options tailored to environmental needs
OEM Service: Available in custom sizes, threads, and finishes
Stock Ready: Quick delivery from warehouse to your assembly line
Technical Support: Engineering team available for application consulting
Quality Assurance & Testing
All products comply with ISO 9001 and IATF 16949 standards. Our inspection procedures include:
GO/NO-GO gauge testing for threads
Torque and tensile strength validation
Head dimension and hex socket depth measurement
Surface coating thickness and adhesion testing
Optical sorting for surface and dimensional defects
Selection & Ordering Guide
To select the right Hex Socket CSK Head Cap Screws, consider:
Load-bearing requirements and tensile grade
Material compatibility with application environment
Required corrosion resistance and coating preference
Countersink compatibility with the installation surface
Drive tool access and hex size specifications
Custom packaging, private labeling, and kitting services are also available to streamline your sourcing process.
Summary & Brand Message
We always adhere to the principle of “quality first, customer foremost,” and are committed to delivering high-quality fastener products and one-stop solutions across diverse industries. Backed by years of experience and technological expertise, Flybear Fastener is your reliable source for premium fastening components. Don’t hesitate to contact us for customized solutions and competitive quotes.
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