Product Description
Professional Hex Flange Self-Drilling Screws for Steel Construction & Roofing
Searching for reliable self drilling screws that eliminate pre-drilling and speed up your installation process? Our zinc finished hex flange head screws combine drilling, tapping, and fastening into a single operation, significantly reducing labor time on your production line. These self tapping dovetail screws are engineered for steel roofing, metal construction, solar panel mounting, and HVAC ductwork applications .
Technical Specifications
Head Type: Hex flange head with bonded washer – 13mm flange diameter
Drive Size: 10mm hex / 5/16" hex socket – high torque transfer
Thread Type: Self-drilling point with dovetail/sharp tip – no pre-drilling required
Finish: Zinc plated / Electro-galvanized – clear chromate (0.0002" thickness)
Material: Carbon steel / Hardened steel – C1022 grade
Washer: EPDM rubber / Neoprene bonded washer – watertight seal
Drilling Capacity: Up to 2 x 0.75mm steel sheets (1.5mm total)
Thread Pitch: Coarse thread – optimized for steel and wood substrates
Engineered for Professional Results
Our hex washer head self drilling screws feature a sharp drill point that penetrates steel without pre-drilling, while the EPDM washer provides a weather-tight seal against water infiltration, making these screws ideal for outdoor roofing and exterior cladding applications . The zinc finish offers corrosion resistance for interior and protected exterior use.
For steel-to-steel fastening, these screws drill through up to 1.5mm of sheet metal, then tap their own threads for a secure hold. For wood-to-steel or wood-to-wood applications, the sharp point penetrates without splitting . The hex flange head distributes clamping force evenly while preventing over-torquing.
Key Applications
Steel roofing – attaching metal panels to purlins and framing
Solar panel mounting – securing racking systems to steel structures
Metal construction – pre-engineered steel buildings and warehouses
HVAC ductwork – fastening duct sections and hangers
Sandwich panel installation – insulated panel fixing
Dovetail connector – concealed furniture and cabinet assembly
Bulk Supply for B2B Buyers
Factory-direct pricing on bulk self drilling screws for roofing contractors, solar installers, steel fabricators, and wholesale distributors. Standard packaging available with custom quantities for volume orders. OEM packaging and labeling available.
Quality Guaranteed
Each batch undergoes dimensional inspection, hardness testing, and salt spray testing to ensure consistent drilling performance and corrosion resistance. ISO 9001-certified manufacturing process.
Order Samples Today
Test our hex flange self drilling screws on your production line. Contact us for sample packs and wholesale pricing.
Specifications:
Material： |
Metal |
Usage： |
Furniture Upholstery |
Minimum Order Quantity: |
100 Box |
Packaging Details: |
Box，Carton |
Delivery Time: |
30days |
Payment Terms: |
L/C or T/T |
Competitive Advantage:
Competitive pricing and low MOQ
Fast shipmentfrom our available stocks
Strict quality control standards
Care about your feedback and advice
Hear your needs and requirements
Testimonials
I come from Jakarta, Indonesia. Our company has been very successful in selling toy fabrics locally. In 2018, I want to develop a new market for furniture fabrics and furniture accessories. I found Wejoy Trade at that time, and they could provide all the products I wanted, which brought me great convenience. Without the hassle of procurement, all I need to do is sell the goods. So, I quickly became one of the top furniture and fabric retailers in Jakarta.
Vengo de una fábrica de muebles en Tegucigalpa, Honduras, donde producimos muebles que abastecen a Sudamérica y a Estados Unidos. Antes tenía que coordinarme con más de una docena de proveedores para adquirir las materias primas que necesitábamos, y el proceso de compra y transporte resultaba complicado y muy costoso. Desde 2022, al comenzar nuestra cooperación con Wejoy Trade, ellos han podido proveer todo lo que necesitamos, resolviendo la mayoría de mis problemas y ayudándonos a ahorrar tiempo y costos. Siguiendo las recomendaciones de Wejoy, incorporamos nuevos equipos provenientes de China y adquirimos muchos materiales con diseños innovadores. Los productos fabricados con estos materiales han sido muy bien recibidos por nuestros clientes finales. Estoy profundamente agradecido con los socios de Wejoy.
I come from West Yorkshire, England. We have been collaborating with Wejoy Trade since 2013, when we were a newly established small company. Through our cooperation and efforts, Wejoy Trade has also provided us with financial support, and we have grown into the largest supplier in the local area. The cooperation and friendship over these years are the most precious.
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