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 single-hole lead seal security screws are purpose-built for electric meters and metering boxes. With a pre-drilled sealing hole, they enable direct wire/seal installation for tamper-proofing. Made via cold forging, they feature high strength, stable threads, and diverse head types. Ideal for power metering equipment, they ensure traceable sealing and prevent unauthorized opening.
TNHO single-hole lead seal screws are designed for electric meter security sealing. The built-in sealing hole allows for direct wire lead sealing, forming an effective anti-tamper system. Manufactured via cold heading, they offer high strength and stable performance. Multiple head types and custom specifications are available, meeting power industry standards for metering equipment safety.
| 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.Integrated single sealing hole：Built-in hole allows direct lead wire installation for tamper-proof sealing.
2.Anti-tamper security design：Prevents unauthorized disassembly; seal damage is immediately visible.
3.High-strength cold forging construction：Precision cold heading ensures stable threads and long service life.
4.Multiple head configurations：Hex, slotted, and custom drive options for different meter models.
5.Clear traceability：Perfect for metering box sealing, enabling easy tamper traceability and management.
Purpose-built for metering applications
Optimized design meets power industry anti-tamper requirements.
Complete custom solution
Custom hole size, thread, length, and material for specific meter models.
High consistency in mass production
Cold forging process ensures uniform quality and dimensional accuracy.
Excellent corrosion resistance
Stainless steel and zinc-plated options perform reliably in harsh environments.
International standard compliance
Meet ISO, DIN, and GB standards for use in global power projects.
Efficient OEM/ODM service
Fast sampling, flexible MOQ, and on-time delivery for global customers.
