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...
Our self-clinching fasteners include clinch nuts, blind-hole clinch standoffs and clinch studs in standard specs M4, M6, M8 with various lengths. Made of carbon steel or stainless steel with nickel plated finish, these fasteners get permanently embedded into thin sheet metal via press clinching without welding or tapping. Widely applied on electric meter shell sheet, PCB board and internal component frame to provide stable internal thread for screw assembly, featuring high pull-out resistance and anti-rotation performance for long-term vibration-proof meter equipment connection.
| System of Measurement | Metric |
|---|---|
| Material | Nickel Plated Carbon Steel, 304 Stainless Steel |
| Standard Sizes | M4×12, M6×4, M6, M8×6, M8, non-standard dimension customizable |
| Product Type | Open Self-Clinching Nut, Blind Hole Clinch Standoff, Self-Clinching Stud |
| Lock Structure | Outer Knurled Serrated Clinch Ring |
| Surface Finish | Nickel Plating, Stainless Steel Passivation |
| Production Process | Cold Heading Forming, Precision Thread Tapping |
| Executive Standard | ISO, DIN, GB, Custom Drawing Specification |
| Application | Electric Meter Sheet Shell, PCB Spacing, Internal Component Fixing |
1.Serrated outer locking ring clinch structure: Outer annular serrations embed into sheet metal after pressing to realize anti-rotation and high pull-out resistance for long-term stable connection.
2.No pre-tapping required for thin sheet mounting: Direct press-in installation saves sheet tapping procedure and simplifies processing flow for thin meter metal casing production.
3.Two premium material & surface finish options: Nickel-plated carbon steel for economical indoor assembly and stainless steel for moisture-resistant outdoor meter equipment usage.
4.Diversified product structure for multi-scenario use: Open nut, blind standoff and clinch stud separately fit thread fixing, layered spacing and positioning demands of meter PCB and shell.
5.Precision standardized internal metric thread design: Fine tapped inner thread matches regular standard screws to ensure smooth screwing and avoid thread slipping during repeated disassembly.
Remarkably cut sheet metal pre-processing cost
Eliminate tapping and welding processes to reduce raw material waste and machining expense for meter casing manufacturers.
High vibration-resistant permanent fastening performance
Mechanical interlock between serration and sheet prevents fastener falling off under long-time operation vibration of electric meter equipment.
Simplified one-step press installation improves production efficiency
Quick press-fit mounting perfectly matches automated stamping lines to boost whole meter assembly throughput.
Flexible full customized service for unique meter design
Adjust body length, thread diameter and clinch structure strictly based on clients’ custom sheet thickness and layout drawings.
Spot inventory of mainstream M4/M6/M8 standard sizes
Ready stocked common specifications support fast sample dispatch and quick bulk order delivery for urgent production demand.
Wide compatibility with various meter shell materials
Workable on cold rolled steel, aluminum and stainless steel sheet commonly used for domestic and overseas electric meter housings.
