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...
These precision-engineered terminal screws are designed for secure wiring connections in electric meters and terminal blocks. Made of brass (H62) or steel with zinc plating, they ensure reliable electrical conductivity and corrosion resistance. Available in slotted, Phillips, and combination drives, they deliver stable contact for long-term metering performance.
TNHO terminal screws are purpose-built for electric meter wiring and connection blocks, providing reliable electrical contact for current-carrying applications. Available in common specifications such as M5×12, M6×12, M7×12.8, and M8×14/15, they feature slotted, Phillips, and combination drive designs for flexible installation. Made of high-quality H62 brass or zinc-plated steel, they offer excellent electrical conductivity and corrosion resistance, ensuring stable connections even under vibration and temperature fluctuations. Precision-machined threads prevent loosening, while the flat/round head designs provide optimal pressure distribution for secure wire clamping in metering equipment.
| System of Measurement | Inch, Metric |
| Material | Stainless Steel, Carbon Steel, Steel, Brass, Iron, Aluminum |
| Thread Size | Metric: M1–M16; Customizable |
| Head Type | Pan Head, Hex Head, Slotted Head, Torx Head, One-Way Head, Step Head, Flat Head, Large Head |
| Surface Finishing | Zinc Plating, Nickel Plating, Black Oxide, Dacromet |
| Production Process | Cold Heading, Cold Forging, Cold Forming |
| Standard | ISO, JIS, GB, ANSI, BSW, DIN, Non-standard customized |
| Grade | 4.8, 6.8, 8.8, 12.9, etc. |
| Brand | TNHO |
| Application | Electric Meter, Electrical, Electronic, Auto Parts, Renewable Energy Industry, etc. |
1.Electrical conductivity optimized: H62 brass material ensures low contact resistance and stable current-carrying performance.
2.Secure wire clamping design: Flat/pan head and cup point set screw options provide reliable pressure distribution for tight wire connections.
3.Multiple drive configurations: Slotted, Phillips, and combination drives support different installation tools and maintenance needs.
4.Corrosion-resistant construction: Natural brass and plated steel options prevent oxidation, ensuring long-term connection reliability.
5.Meter-specific specifications: Covers common terminal screw sizes for most electric meter connection blocks.
Low electrical resistance
High-quality brass material minimizes power loss and heat generation at connection points.
Vibration-resistant performance
Precision threads and clamping design prevent loosening under equipment vibration.
Versatile application compatibility
Suitable for various electric meter models and terminal block designs.
Long-term stability
Corrosion-resistant materials ensure consistent electrical performance over the meter’s service life.
Customization support
Non-standard sizes, materials, and finishes available for special meter terminal requirements.
Industry compliance assurance
Products meet power industry standards for safe and reliable electrical connections.
