Material: Carbon Steel C1022A
Head: Hex Head
Point: #3, #4, #5 (Standard)
Thread: Standard(Coarse, Fine)
Finish: Blue-White Galvanized(Zinc)
Sealing Washer: EPDM
|
Thread Diameter |
Length |
|
|
#8 |
4.2mm |
16 19 25 |
|
#10 |
4.8mm |
16 19 25 32 38 50 |
|
#12 |
5.5mm |
25 32 38 50 65 75 81 90 100 |
|
#14 |
6.3mm |
19 25 32 38 50 65 75 90 100-150 |
Hex big washer self-driling screws, for fastening steel sheet to metal, especially for fixing thevalley of metal roof and wall curtains constructions.
Our Hex Washer Head Self-Drrilling Screws are engineered for high-performance fastening in metal-to-metal applications, specifically designed for securing steel sheets to structural frameworks. These screws excel in critical construction tasks such as installing metal roof valleys and wall curtain systems, where durability, weather resistance, and installation efficiency are paramount.
Self-Drilling Design
Sharp Drill Point: Eliminates pre-drilling, reducing labor time and costs.
Optimized Flutes: Efficient debris removal during drilling, preventing thread clogging.
Hex Washer Head with Sealing
Hex Head: Compatible with electric screwdrivers and impact tools for high-torque installation.
Integrated EPDM Washer: Creates a watertight seal against moisture ingress, ideal for roofing and exterior applications.
Large Bearing Surface: Distributes clamping force evenly, minimizing sheet deformation.
Corrosion Resistance
Material Options: Carbon steel with zinc plating or stainless steel (SS304/316).
Salt Spray Test: 500+ hours for zinc-plated screws; 1,000+ hours for stainless steel
Application-Specific Thread Design
Coarse Threads: Enhanced grip in metal studs and purlins.
Metal Roof Valley Fixing: Secures valley trays to roof structures while preventing leaks.
Wall Curtain Systems: Attaches cladding panels to steel frames with high pull-out resistance.
Solar Mounting: Fastens solar brackets to metal roofs without compromising waterproofing.
Industrial Sheds & Warehouses: Joins corrugated sheets to structural steel.
|
Parameter |
Details |
|
Diameter |
#10 (4.8mm), #12 (5.5mm), #14 (6.3mm) |
|
Length |
20mm to 150mm (custom lengths available) |
|
Standards |
DIN 7504, ISO 15480 |
|
Coating |
Zinc, SS304/316 |
Leak-Proof Guarantee: EPDM washers withstand UV exposure and temperature cycles (-40°C to +120°C).
Vibration Resistance: Locking threads prevent loosening under dynamic loads.
Batch Consistency: Fully automated production with 100% hardness and dimension checks.
Customization: Support OEM branding, color matching (RAL codes), and package tailoring.
Samples: Free test samples available for quality verification.
Lead Time: 45-60 days for standard orders; 20-30 days for urgent projects.
Logistics: FOB/CIF support to global ports; door-to-door delivery available.
Contact us today for a quote tailored to your project requirements!
