Can I contact factories directly on CNFX?

CNFX is an open directory. Each factory profile provides direct contact information.

Clamping Screw Component – Electrical Equipment Manufacturing

Component Specifications

Definition

A clamping screw is a critical fastening component in industrial power connector terminal blocks, designed to mechanically secure electrical conductors (wires or busbars) within the terminal block's housing. It applies controlled compressive force to establish and maintain a low-resistance electrical connection while preventing conductor loosening due to vibration, thermal cycling, or mechanical stress. These screws are engineered for high torque transmission, corrosion resistance, and compatibility with various conductor types and sizes in industrial electrical systems.

Working Principle

The clamping screw operates on the mechanical principle of torque-to-clamp force conversion. When tightened with a calibrated tool, the screw thread engages with the terminal block's internal threading, generating axial force that presses a clamping plate or mechanism against the electrical conductor. This creates a secure mechanical grip and establishes electrical continuity by maximizing surface contact area between conductor and terminal, minimizing contact resistance and preventing arcing or overheating.

Materials

Typically made from high-strength steel alloys (e.g., 8.8 or 12.9 grade steel) with zinc plating or dichromate coating for corrosion resistance. Premium versions may use stainless steel (A2/A4-70/A4-80) for harsh environments, or brass/copper alloys for enhanced electrical conductivity in critical applications.

Technical Parameters

Head Type Hex socket (Allen), slotted, or Phillips
Thread Type Metric (e.g., M4, M5, M6)
Torque Range 1.2-10 Nm (depending on size)
Clamping Force 500-5000 N
Conductor Range 0.5-35 mm² (wire) or up to 10 mm thickness (busbar)
Temperature Range -40°C to +120°C
Corrosion Protection Salt spray test ≥ 96 hours

Standards

ISO 898-1, DIN 912, IEC 60947-7-1

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Clamping Screw.

Parent Products

This component is used in the following industrial products

Industrial Power Connector Terminal Block

Modular electrical connection component for secure power distribution in industrial wiring systems.

View Product Details

Slit Clamping Mechanism

A mechanical component within a slit mount/housing that securely holds and positions optical or mechanical slits.

View Product Details

Engineering Analysis

Risks & Mitigation

Over-torquing causing thread/strip damage
Under-torquing leading to loose connections and overheating
Corrosion in humid/chemical environments
Galvanic corrosion with dissimilar metals

FMEA Triads

Trigger: Incorrect torque application during installation
Failure: Loose connection leading to increased resistance, overheating, and potential fire hazard
Mitigation: Use calibrated torque tools and follow manufacturer specifications; implement torque verification procedures

Trigger: Material fatigue from repeated thermal cycling
Failure: Screw fracture or loss of clamping force
Mitigation: Select materials with appropriate thermal expansion coefficients; implement preventive maintenance schedules

Trigger: Corrosive environment exposure
Failure: Thread degradation and seizure, preventing maintenance
Mitigation: Use corrosion-resistant coatings/materials; specify environmental protection levels (IP ratings)

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

Thread tolerance: 6g per ISO 965-1; dimensional tolerance per DIN 912

Test Method

Torque-to-failure testing per ISO 898-1; salt spray corrosion testing per ISO 9227; electrical continuity testing per IEC 60947-7-1

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation

4/5

Manufacturing capability

4/5

Inspection readiness

5/5

Supplier transparency

3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

Related Components

Induction Coil

Induction coil is a critical component in electromagnetic induction heaters that generates alternating magnetic fields to induce eddy currents in conductive materials for precise, contactless heating.

Protective Housing

Protective housing for industrial wireless power transfer modules, providing environmental protection, EMI shielding, and thermal management.

Alignment System

Precision alignment system for industrial wireless power transfer modules ensuring optimal energy coupling efficiency.

Winding Spindle

A precision rotating shaft in transformer winding machines that holds and rotates the coil form during wire winding operations.

Frequently Asked Questions

What is the main function of a clamping screw in a terminal block?

To securely fasten electrical conductors, ensuring stable electrical connections and preventing loosening from vibration or thermal expansion.

How do I select the right clamping screw for my application?

Consider conductor size/material, required torque, environmental conditions (corrosion, temperature), and compliance with standards like IEC 60947.

Can clamping screws be reused?

Limited reuse is possible if undamaged, but repeated tightening may reduce clamping force; follow manufacturer guidelines for critical applications.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Clamping Screw