A
Anonymous
Mar 30, 2026
Rating: 5/5
No Rust Yet
Installed these 8 months ago. No signs of corrosion on the heads.
Description
This fastener is a self-drilling and self-tapping screw engineered for securing color steel roofing panels. It features an external hex head design that allows for high-torque installation using standard drill drivers, while the integrated drill tail point eliminates the need for pre-drilling holes. The unit includes a composite washer that forms a tight seal against the metal surface to prevent water infiltration and reduce vibration loosening. Manufactured to meet GB standards, this screw combines drilling, tapping, and sealing functions into a single component for efficient roof assembly. Ensure the drill speed is adjusted appropriately for the specific thickness of the steel panel to achieve optimal penetration and seal formation.
Reviews
Attributes
| Brand | - |
| Category | Industrial Small Parts / Connectors and Fasteners |
| Origin | - |
| Material | Carbon Steel |
| Surface Treatment | Zinc Plated & Color Coated |
| Drive Type | Hex Head |
| Thread Size | M4.8 |
| Length Range | 25mm - 150mm |
| Standard Compliance | GB/T 15856.4 |
| Washer Type | EPDM Rubber Bonded |
| Point Style | Self-Drilling No. 3 |
| Head Color | Custom RAL Available |
| Application | Metal Roofing & Wall Cladding |
5 reviews
A
Anonymous
Feb 15, 2026
Rating: 5/5
Excellent Penetration
Drilled through 2mm steel effortlessly. The washer creates a tight seal.
A
Anonymous
Feb 05, 2026
Rating: 4/5
Good Bulk Deal
Mostly perfect. Had about 5 stripped heads in a box of 500.
A
Anonymous
Jan 28, 2026
Rating: 5/5
Perfect Match
Color matched my red roof panels perfectly. Looks professional.
A
Anonymous
Jan 26, 2026
Rating: 5/5
Contractor Approved
I use these for all my shed builds. Reliable and sharp.
5 FAQ
Q: Are the washers resistant to UV damage?
A: Yes, the EPDM rubber washers are UV stabilized for long-term outdoor exposure.
Q: How are these screws packaged?
A: They are available in 100-piece boxes or 5kg plastic kegs for bulk usage.
Q: Can I order these in a specific color?
A: Yes, we can match most RAL colors for large orders. Please contact us for details.
Q: What socket size is required for installation?
A: You will need an 8mm hex nut setter or socket to drive these screws properly.
Q: What is the maximum metal thickness these can drill through?
A: They are recommended for use with steel sheets up to 3mm thick depending on the specific screw length chosen.
![[M2-M20] Stainless Steel Spring Washer](https://www.gosteppe.com/cache/medium/product/16306/legacy-main-ef3d2dba3bde669d48e6cca2.webp)
