Can I contact factories directly on CNFX?

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

Terminal Screw Component – Electrical Equipment Manufacturing

Component Specifications

Definition

A terminal screw is a precision-engineered fastener designed specifically for electrical connections in motor terminal blocks. It functions as the clamping mechanism that physically secures wire conductors to the terminal block's conductive elements, ensuring reliable electrical contact and mechanical stability. These screws are engineered to withstand vibration, thermal cycling, and electrical current while maintaining consistent torque and contact pressure.

Working Principle

The terminal screw operates on the mechanical clamping principle. When tightened, it applies controlled pressure to compress the electrical conductor against the terminal block's contact surface, creating a low-resistance electrical path. Proper torque ensures optimal contact pressure—too little causes high resistance and overheating, while too much can damage conductors or strip threads. The screw's design often includes features like captive washers or flanged heads to distribute pressure evenly and prevent loosening from vibration.

Materials

Typically made from brass, copper alloys, or stainless steel (e.g., 304/316 SS) with optional plating (tin, nickel, or silver) for enhanced conductivity and corrosion resistance. Insulation components may use nylon or PBT.

Technical Parameters

Length 6mm to 20mm
Head Type Pan head, flanged, or countersunk
Drive Type Slotted, Phillips, or hex socket
Thread Size M3 to M6 common
Torque Range 0.5 Nm to 2.5 Nm
Voltage Rating Up to 1000V AC/DC
Temperature Range -40°C to 120°C

Standards

ISO 898-1, DIN 934, IEC 60947-1

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Terminal Screw.

Parent Products

This component is used in the following industrial products

Motor Terminal Block

Electrical connection interface for motor windings

View Product Details

Terminal Blocks/Connectors

Electrical connection interface for temperature sensor wiring in industrial control modules

View Product Details

Engineering Analysis

Risks & Mitigation

Over-tightening causing thread damage
Under-tightening leading to high resistance and overheating
Corrosion in humid environments
Vibration-induced loosening

FMEA Triads

Trigger: Incorrect torque application
Failure: Poor electrical contact or mechanical damage
Mitigation: Use calibrated torque tools and follow manufacturer specs

Trigger: Material corrosion
Failure: Increased resistance or connection failure
Mitigation: Select plated or stainless-steel screws for harsh environments

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

Thread tolerance per ISO 965-1, dimensional accuracy within ±0.1mm

Test Method

Torque testing per ISO 898-1, electrical continuity testing, salt spray testing per ISO 9227 for corrosion resistance

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

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.

Arc Plates

Arc plates are metallic plates within circuit breaker arc chutes that split and cool electrical arcs during interruption to ensure safe circuit disconnection.

Frequently Asked Questions

What is the recommended torque for a terminal screw?

Torque varies by size and material but typically ranges from 0.5 Nm for M3 screws to 2.5 Nm for M6 screws. Always follow manufacturer specifications to avoid overtightening or loose connections.

Can terminal screws be reused?

Limited reuse is possible if threads and clamping surfaces are undamaged, but replacement is recommended after multiple cycles to maintain reliability, especially in high-vibration environments.

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.

Terminal Screw