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 break-off tamper-proof screws are engineered for anti-tamper protection in electric meters. The one-time break-off structure leaves no exposed drive slot after installation, preventing non-destructive removal. Integrated lead seal holes enable traceable sealing. Multiple drive types, including slotted, are available to meet different installation 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.One-time break-off design：Sheared-off drive part after installation eliminates tool access, preventing disassembly.
2.Built-in lead seal holes：Integrated holes enable direct wire sealing for enhanced tamper evidence.
3.Slotted drive for installation：Easy one-time assembly with standard slotted screwdrivers.
4.Cold-forged high-strength construction：Precision forming ensures consistent break torque and reliable performance.
5.Visible tamper marks：Any unauthorized removal leaves permanent damage for easy detection.
Dual anti-tamper protection
Combines break-off design and lead sealing for enhanced security.
Controlled break torque
Precision manufacturing ensures consistent shearing force during installation.
Customizable specifications
Tailored thread, length, break torque, and hole configuration for specific meters.
Multiple material options
Carbon steel, stainless steel, and plated versions for different environments.
Compliant with power industry standards
Meet ISO, DIN, and GB requirements for global utility applications.
Efficient OEM/ODM service
Fast sampling, flexible MOQ, and on-time delivery for bulk orders.
