📌 Overview & Purpose
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The 550‑039 series is a split, fully-shrouded backshell designed to fit MIL‑DTL‑24308 (M24308) D‑Sub connectors. It significantly enhances EMI shielding, environmental sealing, and mechanical strength compared to standard stamped-shell D‑Subs.
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It seals electromagnetic interference by overlapping shell halves and optionally seats onto a metalastic EMI gasket at the mating connector .
🔧 Part Number Breakdown: 550T039M2R1A0‑04
| Segment | Meaning |
|---|---|
| 550T039 | T = top-entry cable; 039 = series |
| M | Finish: electroless nickel |
| 2 | Shell size: Size 2 (≈ 43 mm wide) |
| R1 | Rear panel mount shroud with 0.031″ panel thickness (.8 mm) |
| A | Screw-lock type A: male, socket-head jackscrew |
| 0 | No EMI gasket included |
| –04 | 0.395″ (10 mm) cable entry diameter (“Entry Size 04”) |
🪛 Key Features
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Material & Finish: Die-cast aluminum body with durable electroless nickel plating; stainless steel jackscrews.
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Cable Entry: Supports up to 0.395″ / 10 mm cable bundle (entry size –04).
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Mounting: Rear panel style with a thin 0.8 mm panel cutout. Suitable for Size‑2 D‑Subs.
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Shield Termination: Optionally includes a cable-shield band; though part number lacks “B,” meaning it’s omitted here.
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EMI Integrity: Built for EMI protection; if a gasket is needed, choose “1” instead of “0”.
🧭 Compatibility & Use Cases
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Compatible with M24308 (QD) D‑Subminiature connectors—commonly military/industrial-grade
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Enhances EMI resistance beyond typical stamped-body D‑Subs—ideal for avionics, defense, telecom, or industrial environments
| Weight | 1 lbs |
|---|---|
| Dimensions | 6 × 3 × 2 in |
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