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GR-1017
GORUN
Dual Hi+Lo Thread Hex Flange Head Hex Socket Concrete Self-Drilling Customized Screws
Designed for rapid and secure concrete fastening,
these Heavy Duty Double Thread Screws simplify installations with a self-tapping thread that cuts internal helixes without pre-drilling.
The hex washer head and undercut design eliminate the need for additional nuts, reducing assembly time by 30%. Ideal for connector installations in solar racks, railings, or structural frameworks.
The twin-thread technology (Hi-Lo thread) enhances grip in hollow concrete blocks,
with Customized anti-corrosion coating.
Why Choose Our Factory?
✅ Direct Manufacturer, No Middleman
We are a certified direct factory, not a trading company. This means faster production, better pricing, and direct communication.
✅ ISO 9001 Certified
Our factory meets international quality standards. Every step—from material sourcing to shipping—is strictly controlled.
✅ CE & RoHS Compliant
All our screws are CE & RoHS certified, ensuring they meet EU environmental and safety requirements.
✅ SGS-Audited Supplier
An independent agency (SGS) has verified our factory’s credibility. You can trust our production capacity and ethical practices.
Your Benefits with GORUN SCREW
✔ Flexibility: Customize any detail, even small orders.
✔ Reliability: Proven quality systems and certifications.
✔ Transparency: Full traceability from factory to shipment.
Secure Transactions
To enhance safety, we operate on MAKE IN CHINA 
(Link: https://screw-manufacturer.en.made-in-china.com/
Ready to Start?
Contact us now for a quote or sample. No matter where you're from!
Dual Hi+Lo Thread Hex Flange Head Hex Socket Concrete Self-Drilling Customized Screws
Designed for rapid and secure concrete fastening,
these Heavy Duty Double Thread Screws simplify installations with a self-tapping thread that cuts internal helixes without pre-drilling.
The hex washer head and undercut design eliminate the need for additional nuts, reducing assembly time by 30%. Ideal for connector installations in solar racks, railings, or structural frameworks.
The twin-thread technology (Hi-Lo thread) enhances grip in hollow concrete blocks,
with Customized anti-corrosion coating.
Why Choose Our Factory?
✅ Direct Manufacturer, No Middleman
We are a certified direct factory, not a trading company. This means faster production, better pricing, and direct communication.
✅ ISO 9001 Certified
Our factory meets international quality standards. Every step—from material sourcing to shipping—is strictly controlled.
✅ CE & RoHS Compliant
All our screws are CE & RoHS certified, ensuring they meet EU environmental and safety requirements.
✅ SGS-Audited Supplier
An independent agency (SGS) has verified our factory’s credibility. You can trust our production capacity and ethical practices.
Your Benefits with GORUN SCREW
✔ Flexibility: Customize any detail, even small orders.
✔ Reliability: Proven quality systems and certifications.
✔ Transparency: Full traceability from factory to shipment.
Secure Transactions
To enhance safety, we operate on MAKE IN CHINA
(Link: https://screw-manufacturer.en.made-in-china.com/
Ready to Start?
Contact us now for a quote or sample. No matter where you're from!
