D38999/26WE6SN | 6-Socket Series III Aluminum Straight Plug (Size 17)
The D38999/26WE6SN is a size 17 MIL-DTL-38999 Series III aluminum plug with 6 heavy-duty socket contacts. Features “W” olive drab cadmium finish and “N” polarization for power grids.
999999 in stock
- ISO & Quality Certifications
- 100% Intermateable with original parts.
- 1-Year Warranty with Full After-Sales Support
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D38999/26WE6SN Efficiency of Straight Plug Integration in Power Grids
The D38999/26WE6SN is a precision-engineered interconnect solution designed for specialized electronic grids where rapid deployment and substantial power delivery are core requirements. Utilizing the size 17 aluminum alloy shell, this straight plug facilitate six independent conductive channels through its 17-06 insert arrangement. Unlike high-density signal plugs, the 17-06 layout employs Size 12 socket contacts, which are significantly larger and capable of carrying much higher electrical currents. This makes the D38999/26WE6SN an ideal choice for mobile power generation units, field-deployable radar systems, and heavy-duty motor interfaces where a robust, high-capacity cable-to-receptacle connection is required.
Key Specifications
Shell Material | Voltage Rating | Current Rating | Operating Temp | Ingress Protection | Mating Cycles | Keying & Polarization | Coupling |
|---|---|---|---|---|---|---|---|
Aluminum alloy | ~1000 VAC | ~23 A | -65 °C to +200 °C | IP67 | 500 | N | threaded coupling |

Tactical Environmental Shielding and Grounding Conductivity
The “W” class finish of the D38999/26WE6SN represents a high-strength aluminum housing treated with olive drab cadmium over an electroless nickel underplate. This multi-layered defense system is specifically engineered for the most aggressive field environments, providing a certified 500-hour salt spray rating. Beyond its superior corrosion resistance, the cadmium finish is highly conductive, ensuring the plug shell acts as an efficient extension of the cable shield. The plug is equipped with an internal grounding spring ring that provides 360-degree shell-to-shell conductivity upon mating, protecting the six internal power lines from electromagnetic interference in EMI-polluted environments.
Self-Locking Triple-Start Threads and Vibration Stability
As a Series III straight plug, the D38999/26WE6SN features a triple-start threaded coupling mechanism with an integrated self-locking ratchet. This design allows for a rapid and secure connection with only one full turn of the coupling nut, providing tactile and audible confirmation that the power interface is fully seated. The internal anti-decoupling device ensures that the connector remains locked even when subjected to the severe harmonic vibrations and mechanical shocks typical of aerospace engine compartments or heavy armored vehicle operations. This mechanical stability ensures constant electrical continuity across the six-pin power grid, preventing intermittent energy loss during critical operations.
Precision Socket Fidelity and 17-06 Layout Integrity
Within the size 17 housing, the D38999/26WE6SN employs six Size 12 socket contacts, providing a secure female interface that is highly resistant to mechanical shock and thermal stress. These sockets are precision-machined from copper alloy and finished with high-grade gold plating to maintain an ultra-low-resistance electrical path throughout the equipment’s service life. The large contact surface area of the Size 12 interface is essential for maintaining electrical stability under high-current conditions, preventing localized overheating. The high-performance dielectric insert ensures superior insulation resistance, preventing electrical leakage between the six power channels even in unpressurized aerospace compartments.

Mechanical Protection and Field Maintenance Reliability
The structural reliability of the D38999/26WE6SN is further supported by its 100% scoop-proof shell architecture. This design ensures that the six socket contacts are recessed deeply enough within the housing to prevent any bending or damage if the plug is misaligned during the mating process with a receptacle. For long-term logistical support, the plug utilizes a rear-release crimp contact system, allowing technicians to install or replace individual sockets using standard military-specification tools without disassembling the entire unit. This combination of physical protection and modular serviceability ensures the D38999/26WE6SN provides a durable and low-maintenance solution for ruggedized digital power grids.
FAQ
How many contacts are provided in the D38999/26WE6SN?
How many contacts are provided in the D38999/26WE6SN?
The 17-06 layout features six independent conductive channels using Size 12 socket contacts, optimized for medium-to-high current power and heavy-duty signal transmission.
What are the advantages of the triple-start threaded coupling?
What are the advantages of the triple-start threaded coupling?
The triple-start threads allow for rapid mating with a single turn and include an integrated self-locking ratchet that prevents the plug from loosening under high-vibration conditions.
Does the Olive Drab Cadmium finish provide EMI shielding?
Does the Olive Drab Cadmium finish provide EMI shielding?
Yes, the “W” finish is highly conductive and works with the internal grounding fingers to provide 360-degree EMI/RFI protection for the internal conductive grid.
Is the D38999/26WE6SN compatible with standard Series III receptacles?
Is the D38999/26WE6SN compatible with standard Series III receptacles?
Absolutely. As long as the mating receptacle is size 17, has the 06 layout, and uses standard “N” polarization, it will be fully intermateable with this plug.
Can this connector handle high-vibration aerospace use?
Can this connector handle high-vibration aerospace use?
Yes, the self-locking mechanism and robust aluminum construction are specifically engineered to maintain electrical and mechanical integrity under extreme vibration and shock conditions.
Certification
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