Product Details
This versatile fastener combines several key features to deliver superior performance and a clean finish.
- Countersunk (CSK) Head: Also known as a flat head, this screw features a conical shape with a flat top. It is designed to be installed into a countersunk hole (a cone-shaped recess), allowing the head to sit flush with the surrounding material. This creates a smooth, snag-free surface, which is critical for aesthetic and functional applications.
- Self-Tapping / Self-Drilling Thread: The screw is described as both “self-tapping” and “self-drilling.”
- Self-Tapping: The screw has a sharp thread that cuts and forms its own mating thread in a pre-drilled pilot hole in materials like wood, plastic, and sheet metal.
- Self-Drilling: Some variants may feature a drill-bit point that can create its own hole and form the thread in a single operation, eliminating the need for pre-drilling, especially in metals.
- Drive Types: The primary drive is a Cross-Recessed (Phillips) slot, which allows for convenient and centered installation with common tools. The text also mentions Allen (Hex Socket) as a potential option, providing higher torque capability for more demanding applications.
Product Parameters
The following table details the comprehensive technical specifications for our CSK Head Self-Tapping Screws. We can accommodate various customization requests.
General Specifications:
| Parameter | Description |
|---|
| Product Name | Countersunk (CSK) Head Self-Tapping Screw |
| Standards | GB846, DIN 965 (as dimensional reference) |
| Material Options | Stainless Steel (201, 304, 316) |
| Finish | Stainless Steel: Plain (Passivated) <br> Zinc plating is also mentioned, typically for carbon steel variants. |
| Head Style | Countersunk (CSK) / Flat Head |
| Drive Options | Cross-Recessed (Phillips), Allen (Hex Socket) |
| Thread Type | Self-Tapping, Self-Drilling |
| Size Range | M3, M3.5, M4, M5, M6, M8 |
| Brand Name | Duojia |
| Place of Origin | Hebei, China |
Product Features
Our screws are manufactured to deliver an efficient, durable, and flexible connection experience, offering several key advantages:
- Flush, Aesthetic Finish: The countersunk head design allows the screw to sit perfectly flush, providing a clean, professional, and non-obstructive surface.
- Superior Corrosion Resistance: Available in Stainless Steel grades 304 and 316 for excellent protection against rust and corrosion in harsh or outdoor environments. Grade 201 offers a more economical stainless steel option for less demanding conditions.
- Increased Work Efficiency: The self-tapping or self-drilling functionality eliminates the need for a separate tapping step (or even pre-drilling), saving significant time and labor during assembly.
- High-Strength Connection: Provides a reliable and durable fastening solution for a variety of materials.
- Versatile Design: With options for different stainless steel grades, drive types, and sizes, this screw can be adapted to a wide range of project requirements.
Product Applications
The combination of a flush finish and excellent durability makes these screws a preferred choice in many industries:
- Furniture Manufacturing: Ideal for assembling cabinets, tables, and other wooden furniture where a smooth, invisible fastening is required.
- Sheet Metal and Steel Structures: Used for joining metal panels, frames, and components where a non-snagging surface is important.
- Mechanical Equipment: Securing cover plates, mounting brackets, and assembling machine components.
- Marine and Coastal Construction: The 304 and 316 stainless steel variants are perfect for boat building and fixtures exposed to saltwater and moisture.
- Architectural and Decorative Work: Used for installing trim, panels, and hardware where appearance is critical.
- Electronics Enclosures: Fastening cases and panels on electronic devices.
