Carbon Steel Self-Tapping Screws
Product Overview
The hex flange head mechanically galvanized self-tapping screw is a carbon steel self-tapping fastener engineered specifically for efficient and long-lasting fastening scenarios. Using a high-strength carbon steel substrate, it utilizes a hex flange head design paired with sharp self-tapping threads, allowing it to drive directly into substrates without pre-drilling, which drastically boosts construction efficiency. The surface is treated via a Class 3 mechanical galvanizing process to form a uniform, dense protective zinc layer, which provides excellent rust prevention while avoiding the risk of hydrogen embrittlement common in traditional electro-galvanizing. It adapts to fastening requirements in all types of outdoor, humid, and highly corrosive environments, and is widely applied across multiple fields such as construction, steel structures, and photovoltaics.
Product Applications
Widely used in steel structure industrial plants, photovoltaic mounts, outdoor curtain walls, light steel housing, timber structure buildings, and other scenarios, making it especially suitable for outdoor engineering and industrial equipment installations in coastal or high-humidity areas with demanding requirements for rust prevention.
Product Features
Long-Lasting Rust Prevention: The Class 3 mechanical galvanizing coating is uniform and dense, delivering excellent salt spray resistance. It withstands corrosive environments like moisture and salt spray, offering a service life far exceeding that of regular electro-galvanized screws.
Safe and Reliable: Free from the risk of hydrogen embrittlement, the high-strength substrate paired with precision threads provides a strong locking force and resists loosening, eliminating latent hazards of subsequent fracturing.
Efficient Installation: The hex flange head accommodates conventional socket tools, and the sharp self-tapping thread eliminates pre-drilling for high construction efficiency while avoiding the issues of workpiece crushing and wood splitting.
| Material | Carbon Steel |
| Surface Treatment | Mechanically Galvanized Class 3 |
| Head Type | Hex Head |
| Drive Type | External Hex |
| Thread Type | Dual-Thread (Two-Section Thread) |
| Screw Diameter | Approx. 6.3mm |
| Screw Length | Optional (50mm to 75mm) |
| Screw Type | Self-tapping Screw |
| Corrosion Resistance | High (suitable for coastal and high-humidity environments) |
| Applicable Tools | Wrench or power tools |

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malingfei@linghongscrew.com

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