M8 Connectors

Features

M Series circular connector with compact 8 mm metric threaded locking design
Available in 3-pin, 4-pin, 5-pin, 6-pin, and 8-pin configurations for various signal and power transmission requirements
Male and female connector versions available, including plug and receptacle types
Precision gold-plated copper alloy contacts ensure low contact resistance and long-term electrical reliability
Supports A-coded, B-coded, D-coded, and P-coded configurations for sensors, actuators, industrial Ethernet, and power applications
Manufactured in accordance with IEC 61076-2-104 international standards for reliable cross-brand compatibility
IP67 waterproof protection provides excellent resistance against dust, moisture, oil, and harsh industrial environments
Secure threaded locking mechanism delivers strong vibration and shock resistance in industrial automation systems
Available in straight, right-angle, panel mount, PCB mount, and field-wireable versions
Optional shielded cable assemblies available for improved EMC and signal integrity performance
Durable nickel-plated brass or stainless steel housings designed for demanding industrial applications
Compatible with industrial sensors, PLC I/O modules, robotics, motion control systems, and industrial communication equipment

M8 Circular Connectors | Male & Female Industrial Connectors, 8 mm Metric Thread, IP67 Waterproof for Outdoor Automation

M8 circular connectors are compact industrial devices featuring an 8 mm metric locking thread in accordance with IEC 61076-2-104 standards. As a result, these M8 electrical connectors provide secure, vibration-resistant, and waterproof connections for industrial automation, sensor systems, robotics, I/O modules, and industrial Ethernet applications.

Our M8 connector series includes male and female options in 3-pin, 4-pin, 5-pin, 6-pin, and 8-pin configurations. Furthermore, we offer straight, right-angle, panel mount, PCB mount, and field-wireable versions. Designed for harsh industrial environments, Huada M8 waterproof connectors feature IP67/IP68 protection, gold-plated contacts, and durable metal housings to ensure stable signal and power transmission.

Whether you need compact sensor connectors, industrial communication connectors, or custom cable assemblies, Huada delivers reliable and cost-effective M8 connector solutions for modern automation systems.

Why Choose Our M8 Connectors?

Compact Design

The compact 8 mm threaded interface makes these connectors ideal for miniaturized automation equipment, compact sensors, actuators, and control devices where installation space is limited.

Waterproof Protection

Our M8 waterproof connectors offer excellent resistance to water, dust, oil, and moisture. Therefore, they ensure reliable operation in outdoor and harsh industrial environments.

Vibration Resistance

Featuring precision-machined threaded locking systems, M8 circular connectors maintain secure electrical connections under high vibration and mechanical stress—conditions commonly found in robotics, machine tools, and automated production lines.

Stable Transmission

Gold-plated copper alloy contacts help reduce contact resistance and improve conductivity. In turn, this ensures stable signal integrity and reliable power transmission for industrial automation systems.

Flexible Options

We provide multiple M8 connector configurations and mounting styles, including cable mount, panel mount, PCB mount, and field-wireable versions. Straight and right-angle designs are also available to meet different industrial installation requirements.

Customization Services

Custom M8 connector solutions for OEM and industrial automation projects, including custom cable lengths, PUR/PVC cable jackets, shielded cable assemblies, overmolded connectors, and custom pin configurations. Private label and bulk OEM manufacturing services are also supported.

Main Types of M8 Connectors

M8 3 pin Connector

Commonly used for DC sensor and actuator applications that require compact and reliable signal transmission.

M8 4 Pin Connector

Widely applied in industrial automation, proximity sensors, photoelectric sensors, and PLC I/O systems.

M8 5 Pin Connector

These provide additional contacts for advanced signal transmission and industrial control applications.

M8 6 Pin Connector

Suitable for compact multi-signal devices and industrial automation equipment.

M8 8-Pin Connector

Ideal for high-density signal transmission and industrial communication systems that need multiple contacts in limited installation space.

M8 Connector Coding Options

Huada offers multiple coding types to support different industrial communication and automation requirements.

A-Coded M8 Connectors:Designed for standard sensor and actuator applications.
B-Coded M8 Connectors: Suitable for fieldbus and industrial control systems.
D-Coded M8 Connectors: Used for industrial Ethernet and high-speed data communication applications.
P-Coded M8 Connectors: Engineered for specialized industrial power applications.

Flexible Installation Options

Cable Mounted M8 Connectors: Ideal for direct cable-to-device connections in industrial automation and sensor systems.
Panel Mount M8 Connectors: Designed for secure installation on control cabinets, machine panels, and industrial enclosures.
PCB Mount M8 Connectors: Suitable for compact PCB integration in industrial electronic devices.
Field Wireable M8 Connectors: These allow fast field assembly, on-site maintenance, and flexible cable replacement without changing the entire cable assembly.

Technical Specifications of M8 Connectors

Parameter	Specification
Product Series	M Series Connector
Connector Type	M8 Circular Connector
Industry Standard	IEC 61076-2-104
Number of Contacts	3, 4, 5, 6, 8-pin
Gender	Male & Female
Orientation	Straight & Right Angle
Coding Options	A, B, D, P-Coded
Mounting Type	Cable Mount, Panel Mount, PCB Mount
Cable Length	0.5 m – 20 m (Customizable)
Rated Voltage	30 V – 60 V
Current Rating	1.5 A – 4 A
Contact Resistance	≤ 5 mΩ
Insulation Resistance	≥ 100 MΩ
Protection Rating	IP65 / IP67 / IP68
Locking System	Threaded Locking
Operating Temperature	-20°C to +85°C
Mating Cycles	>100 Cycles
Housing Material	Nickel-Plated Brass / Stainless Steel
Contact Material	Gold-Plated Copper Alloy
Cable Jacket Material	PVC / PUR
Certification	CE, RoHS, UL

Durable Materials for Harsh Industrial Environments

We manufacture M8 connectors using high-quality nickel-plated brass or stainless steel housings, combined with precision-machined gold-plated contacts. Additionally, optional PUR cable jackets provide:

Oil resistance
Abrasion resistance
Chemical resistance
UV resistance
Flex resistance

These features make them ideal for demanding industrial and outdoor applications.

IEC Standard Compatibility

All Our M8 connectors comply with IEC 61076-2-104 international standards. Consequently, they are compatible with a wide range of industrial automation equipment, sensors, actuators, PLC systems, and industrial communication devices worldwide.

Typical Applications of M8 Connectors

Our M8 circular connectors are widely in:

Industrial automation systems
Proximity sensors
Photoelectric sensors
PLC I/O modules
Robotics
Automated production lines
Industrial Ethernet communication
Servo motors
Motion control systems
Packaging machinery
Food & beverage equipment
Medical equipment
Machine vision systems
Railway systems
Renewable energy equipment
Test & measurement devices

Huada Group — Your Professional M8 Connectors Manufacturer

Huada is a professional industrial connector manufacturer specializing in M-series circular connectors for automation and industrial applications.

We use advanced CNC machining centers, precision profile measuring instruments, and strict quality control systems to ensure that every connector achieves excellent dimensional accuracy and stable electrical performance.

Key connector components are machined with tolerances up to ±0.01 mm. This helps ensure reliable mating performance and a long service life.

Our quality control process covers:

Raw material inspection
Precision machining
Connector assembly
Waterproof testing
Electrical performance testing
Dimensional inspection
Final product verification

We can provide complete test reports for each production batch.

OEM & Custom Connector Manufacturing Services

We provide custom industrial connector solutions for automation manufacturers, equipment suppliers, and OEM projects.

Our customization capabilities include:

Custom cable assemblies
Shielded industrial cables
PUR/PVC cable materials
Custom connector coding
Waterproof overmolding
Custom wire lengths
Private label production
Bulk OEM manufacturing

FAQ

1.What is an M8 connector used for?
M8 connectors are commonly used in industrial automation, sensors, actuators, PLC systems, robotics, and industrial Ethernet communication applications.

2. Are M8 connectors waterproof?
Yes. Most industrial M8 connectors offer IP67 or IP68 waterproof protection, making them suitable for harsh industrial and outdoor environments.

3. What is the difference between M8 and M12 connectors?
The primary difference is size. M8 connectors use an 8 mm threaded interface for compact applications, while M12 connectors use a 12 mm thread and typically support higher current and more robust industrial communication applications.

4. What pin configurations are available for M8 connectors?
Common configurations include 3-pin, 4-pin, 5-pin, 6-pin, and 8-pin M8 connectors.

5. What is the operating temperature range of M8 connectors?
Standard operating temperature ranges from -20°C to +85°C, depending on materials and application requirements.

6. Can M8 connectors be customized?
Yes. We provide customized cable lengths, cable materials, connector coding, shielding options, and OEM manufacturing services.