GJB599B MIL-DTL-38999 Series I Wall-Mount Receptacle EMI Shielded Circular Connector 9 Shell Sizes
The GJB599B MIL-DTL-38999 Series I Quick-Release EMI Shielded Connector is designed for compact, lightweight, and high-density circuit signal connection. It features quick-release coupling, EMI/RFI shielding, five-key positioning, anti-mismating protection, and detachable crimp contacts for reliable connection performance.
This series provides 9 shell sizes, multiple contact layouts, and various receptacle mounting styles, including box-type, wall-mounted, front-mounted, rear-mounted, and jam-nut options. Rear accessories comply with GJB1784, supporting stable cable assembly and system-level integration.
The connector is manufactured with aluminum alloy, stainless steel, or titanium alloy shells. Contacts are made of gold-plated copper alloy and support crimp, solder, and PCB termination. With 500-cycle mechanical durability, 10–2000 Hz sine vibration resistance, random vibration resistance, and 300g half-sine shock resistance, it is widely used in aviation systems, defense electronics, communication equipment, industrial control systems, and high-reliability signal interconnection applications.
Contact resistance and rated current of the contact components
| Contact Specifications | Working diameter mm | Contact resistance m Ω | Rated current A |
|---|---|---|---|
| 22D | Φ0.76 | ≤12 | 5 |
| 20# | Φ1.00 | ≤5 | 7.5 |
| 16# | Φ1.60 | ≤2.5 | 13 |
| 12# | Φ2.40 | ≤1.5 | 23 |
| 10# | Φ3.15 | ≤1.0 | 40 |
Electromagnetic interference shielding: at 100 MHz to 1 GHz, the minimum attenuation is 85 dB At frequencies from 1 GHz to 10 GHz, the minimum attenuation is 50 dB.
Voltage rating: V (Note: Different contact arrangements have different operating ratings; specific ratings are indicated by the letters in the upper-right corner of the contact arrangement diagram.)
| Job Level* | M | N | I | II |
|---|---|---|---|---|
| Sea Level | 1300 | 1000 | 1800 | 2300 |
| 21000m | 800 | 600 | 1000 | 1000 |
| Shell | D1 | Thread D2 UNEF-2A A1 | A2 | B | C | D | T | d1 | d2 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 09 | 14.6 | 0.4375-28 | 16.1 | 20.8 | 2.54 | 18.26 | 23.8 | 3.2 | 12.5 | 16.7 |
| 11 | 17.8 | 0.5625-24 | 16.1 | 20.8 | 2.54 | 20.62 | 26.2 | 3.2 | 15.5 | 20.2 |
| 13 | 21.6 | 0.6875-24 | 16.1 | 20.8 | 2.54 | 23.02 | 28.6 | 3.2 | 19.5 | 24.5 |
| 15 | 24.8 | 0.8125-20 | 16.1 | 20.8 | 2.54 | 24.62 | 31.0 | 3.2 | 21.5 | 27.7 |
| 17 | 28.0 | 0.9375-20 | 16.1 | 20.8 | 2.54 | 26.98 | 33.3 | 3.2 | 25.0 | 30.9 |
| 19 | 30.7 | 1.0625-18 | 16.1 | 20.8 | 2.54 | 29.36 | 36.5 | 3.2 | 28.0 | 32.9 |
| 21 | 33.8 | 1.1875-18 | 15.3 | 20.1 | 3.3 | 31.76 | 39.7 | 3.7 | 31.5 | 36.2 |
| 23 | 37.0 | 1.3125-18 | 15.3 | 20.1 | 3.3 | 34.92 | 42.9 | 3.7 | 34.5 | 39.3 |
| 25 | 40.2 | 1.4375-18 | 15.3 | 20.1 | 3.3 | 38.10 | 46.0 | 3.7 | 37.5 | 42.5 |
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.