D38999/24WD35SN | 37-Socket Series III Jam Nut Receptacle (Size 15)
The D38999/24WD35SN is a size 15 MIL-DTL-38999 Series III jam nut receptacle with 37 socket contacts. Features “W” olive drab cadmium finish and “N” polarization for high-density grids.
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D38999/24WD35SN Massive Data Parallelism in Intermediate Shell Architectures
The D38999/24WD35SN is a high-performance interconnect solution designed for specialized electronic grids that require massive data parallelism within a localized hardware interface. Utilizing the size 15 aluminum alloy shell, this receptacle facilitates thirty-seven independent signal channels through its 13-35 high-density insert arrangement. This configuration is essential for modern sensor fusion modules and centralized processor units where a high volume of analog and digital signals must be synchronized. By consolidating thirty-seven channels into a mid-sized 15-shell footprint, the D38999/24WD35SN allows engineers to maximize port density on equipment bulkheads without the bulk of larger size 17 or 19 housings.
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 |
Single-Hole Mounting and Structural Shear Resistance
The Type 24 jam nut design of the D38999/24WD35SN offers a significant mechanical advantage for rapid deployment in ruggedized systems. Unlike flange-mount variants that require multiple fasteners, this receptacle is secured using a single high-torque hex nut, which clamps the connector housing against the panel. This mounting style provides superior shear resistance and prevents panel deformation under the heavy pull-force of thirty-seven-wire cable harnesses. The D-shaped mounting hole ensures that the receptacle remains rotationally stable during the mating of the triple-start threads, maintaining the precise alignment necessary for high-density signal integrity in tactical ground vehicles and airborne pods.
Tactical Environmental Defense and Signal Isolation
The “W” class finish of the D38999/24WD35SN features an olive drab cadmium plating over an electroless nickel underplate, creating a multi-layered defense against atmospheric degradation. This finish is specifically engineered for 500 hours of salt spray exposure, ensuring the socket contacts remain protected in maritime and coastal environments. Beyond its corrosion-resistant properties, the cadmium finish is highly conductive, providing an effective low-impedance ground path to the chassis. This conductivity is vital for ensuring comprehensive EMI and RFI isolation for the thirty-seven internal signal lines, preventing electromagnetic crosstalk and maintaining high-fidelity data transmission in EMI-polluted environments.
Socket Contact Reliability and Dielectric Performance
Within the size 15 housing, the D38999/24WD35SN utilizes thirty-seven Size 22D socket contacts, which provide a secure female interface for mating pins. These sockets are precision-machined from copper alloy and finished with high-grade gold plating to ensure a low-resistance electrical path over hundreds of mating cycles. The use of a high-performance dielectric insert ensures that each of the thirty-seven signals is electrically isolated, maintaining high insulation resistance even under rapid pressure changes or high humidity. This ensures that the dense signal grid remains free from short circuits and signal leakage, providing the reliability required for mission-critical command and control systems.
Self-Locking Integrity for High-Vibration Grids
As a Series III component, the D38999/24WD35SN features a triple-start threaded coupling mechanism with an integrated self-locking feature. This mechanical design is specifically intended for environments subject to high-frequency harmonic vibration and mechanical shock, such as those found near aircraft engine bays or on heavy-duty artillery platforms. The quick-coupling threads ensure a full and secure mate with a single turn, providing tactile confirmation that the grid connection is complete. This ensuring that the thirty-seven signal channels remain uninterrupted even under extreme mechanical stress, preventing the intermittent data loss that can plague lower-specification commercial connectors in tactical scenarios.
FAQ
How many signal channels does the D38999/24WD35SN support?
How many signal channels does the D38999/24WD35SN support?
The 15-35 layout supports thirty-seven independent signal channels using high-density Size 22D socket contacts, making it ideal for large-scale data throughput.
What is the advantage of the Jam Nut (Type 24) mount over a flange mount?
What is the advantage of the Jam Nut (Type 24) mount over a flange mount?
The jam nut mount requires only a single hole in the panel, simplifying machining and allowing for a more compact and weight-efficient installation on crowded equipment bulkheads.
Does the Olive Drab Cadmium (W) finish provide EMI shielding?
Does the Olive Drab Cadmium (W) finish provide EMI shielding?
Yes, the “W” finish is highly conductive, ensuring a reliable low-impedance ground path between the shell and the chassis for superior electromagnetic interference suppression.
Is the "N" keying compatible with other Series III plugs?
Is the "N" keying compatible with other Series III plugs?
Yes, the “N” keying is the standard universal polarization for Series III, ensuring compatibility with any standard-issue size 15-35 plug using the “Normal” configuration.
Can this connector handle high-vibration tactical use?
Can this connector handle high-vibration tactical use?
Absolutely. The self-locking triple-start threads and the secure jam nut mounting are specifically engineered to maintain electrical and mechanical integrity under extreme vibration and shock.
Certification
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