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 four-hole lead seal security screws are specially designed for electric meters and metering boxes. The multi-hole structure allows flexible wire routing for enhanced anti-tamper sealing. Made via cold forging, they feature high strength, stable locking, and diverse drive types. Ideal for power metering equipment, they provide reliable traceability and security.
TNHO four-hole lead seal screws are engineered for electric meter anti-tamper protection. The multi-hole design supports flexible lead wire installation, forming a robust sealing system. Manufactured by cold heading, they deliver consistent quality and long service life. Custom specifications and surface treatments are available to meet power industry requirements.
| 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.Multi-hole lead seal design：Four-hole structure enables flexible wire routing for enhanced anti-tamper sealing.
2.Highly visible tamper evidence：Any unauthorized opening damages the seal, leaving clear traceable marks.
3.Cold-forged high-strength body：Precision cold heading ensures durable threads and long-term reliability.
4.Multiple drive options：Slotted, Phillips, Torx drives available for different installation requirements.
5.Versatile sealing performance：Suitable for various meter models and metering box applications.
Enhanced anti-tamper security
Multi-hole design provides more reliable sealing than single-hole types.
Customizable specifications
Tailored hole size, thread, length, and material for specific meter projects.
Excellent corrosion resistance
Stainless steel and plated options withstand harsh environmental conditions.
Stable mass production quality
Cold forging process ensures consistent dimensional accuracy.
Compliant with industry standards
Meet ISO, DIN, and GB requirements for global power applications.
Efficient OEM/ODM service
Fast sampling, flexible MOQ, and on-time delivery for bulk orders.
