Product Details
Product Description
Zinc plated hex washer head self drilling screws are made from carbon steel for corrosion resistance in metal roofing, HVAC, and steel framing applications. As a China OEM manufacturer, Dingya Fasteners supplies bulk wholesale screws that meet ANSI/DIN standards, ensuring reliable performance and easy installation. Choose us for quality, customization, and factory-direct supply.
Technical Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Standard | ANSI B18.6.4, DIN 7504K | Thread Type | Self-Tapping Thread |
| Head Type | Hex Washer Head | Point Type | Self-Drilling Point (Type BSD) |
| Drive Type | Hex Socket (1/4″ Hex Drive) | Coating / Finish | Zinc Plated (Clear Chromate) |
| Material | Medium Carbon Steel, Hardened | Core Hardness | 45-52 HRC |
| Corrosion Resistance | Good (Salt Spray Test: 96+ hours to white rust) | Drilling Capacity | Up to 12-ga (2.7mm) mild steel |
Product Size (Hot-Selling Models for Metal Construction)
We stock a comprehensive range of sizes to meet various material thickness requirements.
| Gauge | Thread Diameter (mm) | Thread Diameter (Inch) | Length (mm) | Length (Inch) | Drill Point Size |
|---|---|---|---|---|---|
| #8 | 4.2 mm | 0.164″ | 12 – 25 mm | 1/2″ – 1″ | #2 |
| #10 | 4.8 mm | 0.190″ | 16 – 38 mm | 5/8″ – 1-1/2″ | #2 |
| #12 | 5.5 mm | 0.216″ | 19 – 50 mm | 3/4″ – 2″ | #3 |
| 1/4″ | 6.3 mm | 0.250″ | 19 – 75 mm | 3/4″ – 3″ | #4 |
| 5/16″ | 7.9 mm | 0.312″ | 25 – 100 mm | 1″ – 4″ | #5 |
Note: The #12 x 19mm (3/4″) and #12 x 25mm (1″) are our top sellers for attaching 20-ga to 16-ga steel. The point size (e.g., #3) indicates drilling capacity in steel gauge.
Application Scenarios
These screws are designed for fast, strong fastening in a wide range of metal applications:
- Steel Framing Construction: Perfect for fastening drywall to metal studs, connecting light gauge steel (LGS) frames, and assembling pre-engineered metal buildings.
- HVAC and Ductwork Installation: The standard for securing sheet metal ducts, attaching hangers and brackets, and assembling ventilation systems.
- Metal Roofing and Siding: Ideal for corrugated metal roof installation, wall panel attachment, and trim fastening.
- Electrical and Plumbing Trades: Used for mounting electrical boxes to steel, securing conduit straps, and hanging pipe brackets.
- General Metal Fabrication: Essential for assembling machine guards, workbenches, shelving, and industrial equipment.
- Trailer and Container Manufacturing: Used in trailer side panel assembly, container repair, and component mounting.
Frequently Asked Questions (B2B-oriented)
A: Yes. Our zinc plated self drilling screws for metal roofing and steel framing construction provide excellent corrosion resistance and high tensile strength. The hex washer head ensures secure fastening, while the self-drilling tip allows quick installation without pre-drilling.
A: Absolutely. Dingya Fasteners is an ANSI and DIN certified zinc plated fasteners supplier in China, and all batches are inspected for drilling performance, plating adhesion, and thread precision before shipment.
A: Yes. We provide bulk wholesale zinc plated self drilling screws for HVAC ductwork and ventilation systems, with stable lead time and consistent factory-direct pricing. OEM or private-label packaging can be customized for distributors.
A: As a China OEM zinc plated self drilling fasteners manufacturer, we deliver competitive pricing, stable quality, and flexible order volumes. Many small and medium-sized contractors prefer direct factory supply for better value and faster delivery.
A: Our zinc plated hex washer head self drilling screws are primarily designed for steel and metal sheet fastening, but can also work with certain composite or wood structures when paired with the right drill speed and torque settings. We can provide technical data upon request.