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 screws are purpose-built for electric meter housings and covers. Available in Phillips pan head and slotted flat head styles, they are made of 304 stainless steel or brass for superior corrosion resistance. With standard metric sizes (M2.5-M8), they deliver secure, long-lasting fastening for power metering equipment.
TNHO screws for electric meter housings and covers are specially designed for power metering equipment applications. Available in Phillips pan head and slotted flat head types, they cover a full range of common metric sizes from M2.5 to M8, including specifications like M2.5×5, M4×9, M5×11, M6×11, and M8×14. Made of 304 stainless steel or brass, they offer excellent corrosion resistance to withstand moisture, temperature fluctuations, and outdoor environments. Precision cold-forged threads ensure tight engagement and prevent loosening caused by vibration during meter operation. Each screw is manufactured to strict power industry standards with precise dimensional tolerances, making them ideal replacements for original parts in single-phase and three-phase electric meters.
| 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.Complete meter-specific size range: Covers all common metric sizes from M2.5 to M8, fitting most single-phase and three-phase electric meter housings and covers.
2.Highly corrosion-resistant materials: 304 stainless steel and brass options withstand moisture, temperature changes, and outdoor conditions for long-term reliability.
3.Multi-drive compatibility: Phillips pan head and slotted flat head designs support different installation tools and maintenance scenarios.
4.Precision anti-loosening threads: High-precision cold-forged threads ensure tight engagement, preventing loosening caused by equipment vibration.
5.Standardized quality control: Manufactured to strict power industry standards with precise tolerances for direct replacement of original parts.
One-stop sourcing solution
Full range of meter screw specifications available, reducing supply chain complexity and costs.
Long-term stable performance
Premium materials and surface treatments minimize maintenance frequency and operational costs.
Versatile application compatibility
Suitable for indoor, outdoor, low-voltage, and high-voltage metering equipment with strong universality.
Efficient production & delivery
Mature cold forging and machining processes enable fast lead times for large orders.
Customization support
Non-standard sizes, materials, and finishes available to meet special meter model requirements.
Industry compliance assurance
Products meet relevant power industry standards for use in various utility projects.
