Product Details
Product Description
China factory direct supply stainless steel hex washer head self-drilling screws for wholesale. Made from 410 stainless steel, these screws offer good corrosion resistance and durability. The self-drilling point eliminates need for pre-drilling, saving time and labor costs. Perfect for outdoor applications, construction projects, and metal fabrication. Bulk discounts available for distributors and contractors worldwide.
Technical Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Standard | DIN 7504, ANSI B18.6.4 | Thread Type | Self-Tapping |
| Head Type | Hex Washer Head | Point Type | Self-Drilling Point (Type BSD) |
| Drive Type | 1/4″ Hex Drive | Material | Stainless Steel 410 |
| Finish | Natural | Hardness | 40-45 HRC |
| Tensile Strength | 850 MPa | Corrosion Resistance | Good (suitable for outdoor applications) |
| Magnetic Response | Magnetic | Point Size | #2, #3, #4 Available |
Product Size (Popular Sizes)
Commonly ordered sizes for international markets:
| Diameter (mm) | Diameter (Inch) | Length (mm) | Length (Inch) | Point Size |
|---|---|---|---|---|
| 4.2 mm | #8 | 19 mm | 3/4″ | #2 |
| 4.8 mm | #10 | 25 mm | 1″ | #2 |
| 5.5 mm | #12 | 32 mm | 1-1/4″ | #3 |
| 6.3 mm | 1/4″ | 38 mm | 1-1/2″ | #4 |
Note: Other sizes available for bulk orders
Application Scenarios
Application Scenarios for 410 Stainless Steel Hex Washer Head Self-Drilling Screws
- Metal Roofing & Cladding: Corrosion-resistant screws for outdoor projects.
- HVAC Systems: Stainless steel fasteners for secure installations.
- Construction & Fabrication: High-strength screws for structural assemblies.
- Electrical & Communication Equipment: Self-drilling screws for enclosures and panels.
- Automotive & Marine: Durable screws for vehicles and boats.
- Sheet Metal Work: Reliable fasteners for precise metal fabrication.
- Outdoor Fixtures: Stainless steel screws for playgrounds, signage, and infrastructure.
Frequently Asked Questions (B2B-oriented)
A: Choose 410 when you need higher shear strength and hardness, such as in high-vibration assemblies or when drilling into tougher steel. Choose 304 for superior corrosion resistance in outdoor, humid, or chemical environments. As a rule of thumb, 410 is typically more cost-effective than 304 for a given strength level. We can provide a side-by-side cost-performance analysis for your specific volume to help you decide.
A: Yes. We use a aggressive Type 17 drill point with a wide flute for rapid chip ejection. This geometry minimizes bit walk-off and reduces driving torque, which translates to faster installation times and less operator fatigue on your production line. Ask about our screws with waxed threading for even higher speed assembly.
A: We structure our MOQs to be accessible for growing businesses. Our standard MOQ is as low as one master carton, but we offer significant price breaks at pallet quantities. We are highly flexible on packaging—we can do plain poly bags, labeled boxes, or custom packaging to fit your warehouse or rebranding needs.
A: Absolutely. We regularly conduct head-to-head comparisons and replacement analyses for our clients. Send us your sample or print, and we will match the critical dimensions, head style, and point geometry. We’ll provide our equivalent product for testing and a competitive quote that often delivers better value.
A: For a full container load (FCL), our standard lead time is 20-30 days, often faster for in-stock items. Every batch undergoes in-house quality checks for critical dimensions, material grade, and hardness. We can provide mill test certificates for both 304 and 410 materials as part of our standard documentation.
A: This is a common frustration. Our hex washer heads are cold-forged for a precise fit and deeper drive socket, which maximizes contact with the tool bit and resists cam-out. Combined with the consistent hardness of our stainless steel, this ensures high torque capability without head stripping. Request a sample to test in your highest-torque applications.