TNHO Non‑Hole Lead Seal Tamper‑Proof Screws for Electric Meters
These non‑hole lead seal security screws are professionally designed for electric meters and metering boxes. Made by cold heading and...
Our triangular security screw series features a unique triangular drive, designed exclusively for electric meter anti-tamper fastening. Made of 304 stainless steel in standard sizes M6×17 and M6×27, they prevent unauthorized disassembly with standard tools. The built-in flange washer evenly distributes pressure, while the stainless steel material offers excellent corrosion resistance for outdoor meter cabinets. These screws meet power grid security requirements, ideal for anti-tamper and anti-theft applications in power metering equipment.
| System of Measurement | Metric |
|---|---|
| Material | 304 Stainless Steel (304HC) |
| Standard Sizes | M6×17, M6×27, custom non-standard dimensions available |
| Drive Type | Triangular (Security) Drive |
| Head Type | Hexagonal Head with Built-in Flange Washer |
| Surface Finish | Stainless Steel Natural Passivation |
| Production Process | Cold Heading, Thread Rolling, Precision Machining |
| Executive Standard | ISO, DIN, GB, Custom Drawing Specification |
| Application | Electric Meter Anti-Tamper Fastening, Cabinet Cover, Access Panel Fixing |
1.Triangular anti-tamper drive design: Requires a special triangular screwdriver for disassembly, effectively preventing unauthorized tool-based tampering.
2.304 stainless steel anti-corrosion material: Provides excellent rust and corrosion resistance for long-term use in outdoor damp meter cabinet environments.
3.Integrated flange washer for pressure distribution: Built-in flange eliminates additional gaskets and evenly spreads tightening force to protect the meter shell surface.
4.Precision rolled standard metric thread: Uniform thread pitch ensures smooth assembly, stable clamping force, and durability for repeated use.
5.Customizable thread length options: Standard M6×17/M6×27 sizes and custom lengths available to match various meter shell thicknesses.
Highly effective anti-tamper performance
Unique triangular drive prevents disassembly by common tools, fully meeting power grid anti-theft and anti-tamper requirements.
Outdoor environment adaptability
304 stainless steel material resists moisture and corrosion, maintaining reliable performance in harsh weather conditions.
One-piece structure simplifies assembly
Integrated flange washer design eliminates gasket installation steps, improving meter production line assembly efficiency.
Excellent mechanical strength
Stainless steel has good tensile and shear resistance, avoiding breakage during repeated disassembly and tightening.
Spot inventory for mainstream specifications
Standard M6×17 and M6×27 sizes are stocked in large quantities, supporting fast delivery of small samples and bulk orders.
Full compliance with power industry standards
Product performance meets international fastener and power grid anti-tamper requirements, suitable for various domestic and imported electric meter products.
