Epoxy Coated Hex Flange Head One-Slot Hi-Lo Thread Diamond Screws High-performance self-tapping fasteners for hard substrates like concrete, stone, and bricks. Made from high-strength carbon steel (10B21/45#) via precision cold forging, heat treatment, and black epoxy coating, offering exceptional durability.
Key Features & Advantages:
1.Rust-X Blue High Corrosion-Resistant Coating: Nano-ceramic blue coating with ≥1000 hours salt spray resistance, free of hydrogen embrittlement and heavy metals, offers corrosion resistance 10x higher than zinc plating, ideal for outdoor environments.
2.Hi-Low Thread Structure: High threads cut concrete/masonry fibers; low threads form locking engagement, reducing driving resistance and improving anchoring strength.
3.Diamond Point: T-point tip designed for direct concrete penetration without pre-drilling, completing fastening in one step.
4.Hex Flange + Slotted Drive: Standard hex head works with wrenches/power tools; flange increases bearing area; slotted drive allows versatile installation.
5.Hydrogen-Embrittlement-Free Safety Design: Rust-X process removes hydrogen embrittlement risk, preventing delayed fracture in high-stress concrete connections.
6.Full Hi-Low Thread Shank: Continuous threads ensure deep concrete engagement, offering excellent pull-out and torsion resistance for heavy-load applications.
7.Anti-Loosening Serrrated Flange: Serrated flange grips substrate during tightening, providing mechanical anti-loosening and resisting vibration and impact.
8.Multi-Substrate Compatibility: Suitable for concrete, solid brick, lime sand brick, stone, compatible with wood and metal parts for versatility.
Common Applications:
1.Building Decoration Engineering: Fixing steel keels, drywall, wood joists, ceilings, and partitions to concrete
2.Piping & HVAC Systems: Installing duct supports for fire protection, water supply, and air conditioning to walls/floors
3.Equipment Installation: Securing equipment, electrical enclosures, distribution boxes, and surveillance brackets
4.Curtain Wall & Exterior Wall Projects: Connecting wall panels, insulation boards, and keels to concrete structures
5.Outdoor & Anti-Corrosion Projects: Fixing outdoor facilities, canopies, sheds, and railings to concrete, ideal for humid environments
6.Renovation & Retrofit Projects: Old house renovation, retrofits, and secondary fixing to concrete walls/floors
7.Other Hard Substrate Scenarios: Connecting wood, metal parts, and supports to solid brick, lime sand brick, and stone
FAQ:
Q1: Can these screws be used outdoors or in humid environments? A1: Yes, the Rust-X blue coating ensures excellent salt spray/corrosion resistance, ideal for outdoor, humid, and coastal areas.
Q2: What differentiates Hi-Low thread from standard straight thread concrete screws? A2: Hi-Low thread has alternating high and low threads: high threads cut fibers, low threads secure. This reduces driving torque by up to 30% and enhances pull-out force by over 40% versus standard threads, simplifying installation and boosting connection security.
Q3: Is it necessary to use additional washers with the hex flange head? A3: No additional washers needed. The flange acts as a built-in washer for pressure distribution and crush prevention, while serrations offer mechanical anti-loosening.
Q4: Are these screws removable and reusable? A4: Screws can be removed and reused if screw, coating, and threads remain intact. But, for structural or safety-critical uses, reuse isn’t recommended to ensure reliability.
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