J599 Series Circular Military Connectors
MIL-DTL-38999 Series III | High-Density Circular Connectors
Product Overview
The J599 Series Circular Connectors are manufactured in compliance with GJB599B (MIL-DTL-38999 Series III) standards, providing outstanding electrical and mechanical performance for mission-critical applications. Featuring a triple-start threaded coupling with an anti-loosening mechanism, these connectors ensure secure, vibration-resistant connections in the most demanding environments.
Designed for aerospace, military, naval, railway, industrial automation, and communication systems, the J599 series offers high contact density, excellent EMI shielding, and reliable operation under extreme environmental conditions.
Key Features
- Compliant with GJB599B / MIL-DTL-38999 Series III
- Triple-start threaded quick coupling
- Anti-vibration and anti-loosening mechanism
- Compact size and lightweight design
- High contact density
- Excellent EMI/RFI shielding
- Removable crimp contacts
- Polarized keying prevents mismating
- Compatible with fiber optic, coaxial, and shielded contacts
- Available in aluminum alloy, stainless steel, and titanium alloy shells
- Suitable for harsh military and industrial environments
Applications
- Aerospace Systems
- Military Electronics
- Naval Equipment
- Defense Systems
- Radar & Surveillance
- Railway Transportation
- Industrial Automation
- Telecommunications
- Power & Control Systems
Technical Specifications
Mechanical
| Parameter | Specification |
|---|---|
| Coupling Style | Triple-Start Threaded |
| Termination | Crimp / Solder / PCB |
| Mechanical Life | ≥500 Mating Cycles |
| Shock Resistance | 300 g (3 ms Half-Sine) |
| Vibration | 60 g Sine Wave |
| High Temperature Random Vibration | RMS 41.7 g |
| Room Temperature Random Vibration | RMS 49.5 g |
Materials
| Component | Material |
|---|---|
| Shell | Aluminum Alloy / Stainless Steel / Titanium Alloy |
| Contacts | Gold-Plated Copper Alloy |
| Insulator | Thermoset or Thermoplastic |
| Seals | Silicone Rubber |
Available Surface Finishes
| Type | Finish |
|---|---|
| W | Cadmium Plating (Olive Drab) |
| F | Electroless Nickel |
| K | Stainless Steel Passivation |
| FT | Satin Cadmium Plating |
| TA | Titanium Alloy |
Contact Ratings
| Contact Size | Diameter | Contact Resistance | Rated Current |
|---|---|---|---|
| 22D | 0.76 mm | ≤12 mΩ | 5 A |
| 20 | 1.00 mm | ≤5 mΩ | 7.5 A |
| 16 | 1.60 mm | ≤2.5 mΩ | 13 A |
| 12 | 2.40 mm | ≤1.5 mΩ | 23 A |
| 10 | 3.15 mm | ≤1.0 mΩ | 40 A |
Electrical Performance
| Parameter | Specification |
|---|---|
| Insulation Resistance | ≥5000 MΩ @ 500 VDC |
| Dielectric Withstanding Voltage | Up to 2300 VAC (depending on service class) |
| Contact Material | Gold-Plated Copper Alloy |
| EMI Shielding | Up to 85 dB (100 MHz–1 GHz) |
Fiber Optic & Coaxial Compatibility
Supports:
- Size 20, 16 and 12 Fiber Optic Contacts
- Size 12, 10 and 8 Coaxial Contacts
- Shielded Contact Modules
- PCB Contacts
- Crimp Contacts
- Solder Contacts
Environmental Performance
| Parameter | Specification |
|---|---|
| Operating Temperature (W) | -65°C to +175°C |
| Operating Temperature (F/K/FT/TA) | -65°C to +200°C |
| Salt Spray | W: 500 h • K/TA: 1000 h • F: 48/96 h • FT: 96 h |
| Moisture Resistance | MIL-DTL-38999 Qualified |
| Sealing | Low Pressure Sealed |
| Chemical Resistance | Fuels, Oils, Coolants & Solvents |
| Environment | Rain, Sand, Dust, Humidity & Severe Vibration |
Product Advantages
- MIL-DTL-38999 Series III compliant
- High-density contact arrangements
- Excellent vibration resistance
- Superior EMI shielding
- Removable crimp contacts
- Long service life
- Reliable operation in harsh environments
- Supports power, signal, fiber optic, and coaxial contacts
- Military-grade quality and durability
Typical Industries
- Aerospace
- Defense
- Naval
- Railway
- Industrial Automation
- Robotics
- Telecommunications
- Test & Measurement
- Energy Systems
- Mission-Critical Electronics
