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 break-off tamper-proof screws with slotted drive are purpose-built for electric meter security. The one-time break-off design prevents unauthorized disassembly, while the integrated lead seal holes ensure tamper evidence. Made via cold forging, they offer high strength and stable performance for power metering applications.
TNHO knurled knob fasteners with piercing pin and threaded stud combine ease of use with reliable performance. The knurled knob allows quick hand tightening without tools, while the piercing pin or threaded stud ensures a firm, anti-loosening connection. Suitable for furniture, electronics and machinery, they support custom specifications for your assembly needs.
| 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.Tool-free knurled knob design：Textured surface for easy hand tightening and anti-slip grip.
2.Dual connection options：Available with piercing pin or threaded stud for different assembly requirements.
3.Reliable holding power：Precision-machined stud ensures secure connection and prevents loosening.
4.Quick assembly & disassembly：Enables fast, repeatable installation without additional tools.
5.Customizable specifications：Tailored knob size, stud length, thread and material to fit your application.
Enhanced usability
Knurled design eliminates the need for tools, improving assembly efficiency.
Versatile connection solutions
Piercing pin for quick fixing, threaded stud for reusable assembly.
Durable construction
High-quality materials and surface treatments ensure long-term performance.
Customizable appearance & function
Multiple knob styles, colors and finishes available for branding needs.
Cost-effective assembly
Reduces labor time and tool requirements for production lines.
Comprehensive support
Fast sampling, flexible MOQ, and OEM/ODM services for custom projects.
