Stainless Steel Phillips Countersunk Head Drilling Screws
Product Overview
Phillips Countersunk Head Drilling Screws are designed to offer a clean flush finish and superior fastening strength in a variety of metal and wood applications. Crafted with a Phillips drive for better torque transmission and a self-drilling point to eliminate the need for pre-drilling, these screws streamline installation and ensure a tight, secure hold. Made of high-quality stainless steel, they are corrosion-resistant and suitable for outdoor and industrial environments.
These screws are commonly used in construction, roofing, metal framing, and HVAC applications, providing efficient one-step fastening. As part of our advanced range of self-drilling screws, the countersunk head style allows the screw to sit level with or below the surface of the work material for an aesthetically pleasing finish.
Product Specifications Table
| Parameter | Specification |
|---|---|
| Product Name | Phillips Countersunk Head Drilling Screws |
| Head Type | Countersunk (Flat) Head |
| Drive Type | Phillips |
| Thread Type | Self-Tapping, Coarse Thread |
| Point Type | Self-Drilling |
| Material | Stainless Steel |
| Length Range | 13mm – 50mm |
| Diameter | ST2.2, ST2.9, ST3.5, ST4.2, ST4.8, ST5.5, ST6.3 |
| Standard Compliance | DIN 7504P / ISO 15482 |
Technical Parameters Table
| Property | Value |
|---|---|
| Hardness (Stainless Steel) | 23-30 HRC |
| Shear Strength | ≥ 480 MPa |
| Tensile Strength | ≥ 600 MPa (based on material) |
| Torque Performance | High torsional strength |
| Salt Spray Test | ≥ 500 Hours (for surface-treated variants) |
Material Introduction and Manufacturing Process
Our Phillips Countersunk Head Drilling Screws are made from premium-grade stainless steel such as A2-70 or A4-80, offering excellent rust and corrosion resistance, making them ideal for marine and exterior use. Each screw undergoes cold forming via multi-stage punching machines, thread rolling, head forming, and heat treatment if required. A secondary surface treatment, including passivation or other protective coatings, enhances anti-corrosion properties for extreme environments. The result is a screw with high structural stability and long service life.
Typical Applications Across Industries
These screws serve a wide spectrum of industries including:
- Residential and commercial construction
- Metalworking and steel framing
- HVAC duct installation
- Automotive assembly and repair
- Electrical panel fastening
- Wood-to-metal applications
Their ability to drill directly into metal or wood without pilot holes saves time and labor, making them a preferred choice for contractors and manufacturers globally.
Advantages & Competitive Edge of Phillips Countersunk Head Drilling Screws
Material Excellence
Manufactured from corrosion-resistant stainless steel, these screws offer superior durability in harsh environments.
Precision Manufacturing
Tight tolerance control ensures sharp, uniform threads and consistent drive engagement, reducing cam-out and improving installation speed.
Advanced Surface Treatment
Optional surface coatings boost rust resistance, with salt spray resistance reaching more than 500 hours, ideal for coastal or high-humidity conditions.
Strong Customization Capabilities
Whether you need unique dimensions, drive designs, or packaging, Flybear Fastener supports OEM and ODM services with reliable lead times.
Robust Inventory & Quick Delivery
With an optimized warehouse management system and consistent stock levels, we ensure on-time delivery to global customers.
Excellent After-sales Support
Our knowledgeable technical team provides end-to-end support, from product selection to troubleshooting, ensuring a worry-free customer experience.
Company Testing & Quality Control
At Flybear Fastener, all products pass through rigorous quality control procedures including dimensional testing, salt spray corrosion testing, coating thickness testing, and tensile/shear strength analysis. We follow ISO-certified quality management systems to guarantee defect-free delivery.
Selection & Purchasing Guide
When selecting your Phillips Countersunk Head Drilling Screws, consider:
- Application material type (steel, wood, etc.)
- Required screw length and diameter
- Environmental exposure and corrosion risk
- Torque and holding strength requirements
- Aesthetic finish and head flushness
To aid your selection, we offer datasheets and free consultation from our technical team. Large-volume orders benefit from competitive pricing and logistical efficiency.
Summary & Company Promotion
Flybear Fastener is your trusted partner for high-performance fastener products. We proudly serve customers worldwide with a diversified range of screws, bolts, and custom fasteners.
We always adhere to the philosophy of “Quality First, Customer Supreme” and are committed to delivering top-grade fastener products and one-stop solutions tailored to your industry needs. Visit our website to explore more products or contact us for custom quotes, expert technical advice, and tailored industry solutions.
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