Product Overview
This custom four-pin socket is engineered for industrial applications that require stable signal transmission, reliable power delivery, and outstanding environmental resistance. Designed with a titanium alloy housing (Ti-6Al-4V) and precision-machined thread interface, this four-core connector delivers high strength, excellent corrosion resistance, and long-term durability even under fluctuating temperatures or harsh operating conditions.
To ensure consistent conductivity, each terminal is manufactured from 4J50 or 4J29, finished with nickel plating followed by gold plating. The insulation structure is made of glass or ceramic, providing exceptional electrical isolation and structural stability. This design makes the socket suitable for demanding applications across measurement instruments, control systems, aerospace test equipment, and industrial automation.
Material Options & Construction
Connector Housing
Ti6Al4V Titanium Alloy
Offers a superior balance of strength, weight, and corrosion resistance. Ideal for long life, repeated installation, and environments requiring hermetic integrity.
Terminals
4J50 / 4J29 alloy pins
Finish: Nickel plating + gold plating
Ensures low contact resistance and excellent oxidation resistance.
Insulator
Glass or ceramic insulator
Chosen for high dielectric strength and thermal stability.
Surface Requirements
All visible surfaces must be free from burrs, cracks, rust, contamination, or any defect that affects assembly quality or electrical conductivity.
Edge sharpness requirements: R < 0.1 mm for proper mating performance.
Technical Specifications
| Specification | Value |
|---|---|
| Thread Standard | 1/4-28 UNF-2A |
| Number of Contact Points | 4 cores |
| Insulation Material | Glass or ceramic |
| Terminal Material | 4J50 / 4J29 with Ni + Au plating |
| Operating Temperature | –55 °C to +125 °C |
| Contact Current Rating | 1 A |
| Insertion / Extraction Life | ≥ 500 cycles |
| Insulation Resistance | ≥ 5 GΩ at 100 V DC (pin-to-pin & pin-to-shell) |
| Helium Leakage Rate | Less than 2×10⁻⁸ STD CC/SEC |
| Dimensional Tolerance | ±0.05 mm |
| Edge Radius | R < 0.1 mm |
All specifications follow precision-machining quality standards to ensure consistent interchangeability and long-term stability.
Performance & Reliability
Engineered as a high-reliability multi-pin connector, the four-pin socket is built to maintain stable electrical performance in environments with vibration, extreme temperatures, or continuous plug-unplug cycles. The combination of titanium housing, hermetic sealing capability, and gold-plated contacts ensures:
Stable signal integrity over time
Low contact resistance due to gold-plated terminals
High insulation resistance suitable for sensitive instrument signals
Leak-tight performance for controlled environments or gas-sensing applications
These advantages make it a suitable choice for instrumentation connectors, sensor systems, aerospace ground equipment, and industrial monitoring devices.
Manufacturing Precision & Quality Control
To support demanding engineering applications, every connector is manufactured with controlled machining accuracy and thorough inspection:
CNC-machined housing with thread accuracy to UNF-2A standard
Glass/ceramic insulator bonded with high-temperature sealing processes
Helium leak test ≤ 2×10⁻⁸ STD CC/SEC
Dimensional accuracy maintained at ±0.05 mm
100% inspection on contact position, insulation clearance, and finish conditions
We also support industry-required testing such as contact resistance checks, thermal cycling, vibration tests, and plating thickness validation upon request.
Applications
This four-core connector is widely used in industries where electrical reliability and environmental resistance are critical:
Industrial automation systems
Sensor modules and detection instruments
Environmental monitoring devices
Aerospace and defense test equipment
Motor control assemblies
High-temperature experimental devices
Precision measuring instruments
For customers seeking a custom multi-pin electrical connector tailored to their assembly design, we can modify thread type, housing material, terminal arrangement, and insulation structure.
Customization Capabilities
Our engineering team provides full OEM customization to meet your exact application needs:
Custom thread sizes and interface types
Different pin counts (2-pin, 3-pin, 4-pin, multi-pin)
Optional stainless steel or aluminum housings
Gold plating thickness adjustment
Alternate insulator materials
Modified sealing grades
CNC machining tolerance adjustments
Private-label manufacturing for OEM projects
This flexibility makes us a dependable four-pin socket manufacturer for specialized industrial applications.
Why Choose Our Four-Pin Socket
High-reliability design suitable for industrial and aerospace requirements
Titanium alloy housing for exceptional mechanical strength
Gold-plated terminals for stable, long-life conductivity
Hermetic sealing capability for critical environments
Proven supply experience in multi-pin electrical connectors
Custom machining and engineering support for prototype to mass production
Stable quality control at every manufacturing stage
FAQ
Q: Can the thread type of the four-pin socket be customized?
A: Yes. Besides 1/4-28 UNF-2A, we can machine metric threads or other industry-specific thread forms.
Q: What plating thickness do you provide for the terminals?
A: Standard plating is nickel underlayer with gold finish. Thickness can be modified depending on signal requirements.
Q: Is this connector suitable for high-temperature environments?
A: Yes. It operates reliably between –55 °C and +125 °C, making it suitable for most industrial and instrumentation use cases.
Q: Can you support small-batch prototypes?
A: We accept both low-volume prototype orders and large-scale production with consistent quality control.
Q: Do you provide helium leakage test reports?
A: Leak test verification can be provided for each batch when required.
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