How to Decode 390HS003 / 390HS053 Backshells + M24643 Cable + D38999 Connector (Full Guide)

Описание: In this video, I demonstrate how to take an obsolete Glenair backshell part number—390HS003M1316C8—and break down every element to understand its meaning. Then, using the current Glenair catalog, I show how to generate a modern equivalent part number that improves on the legacy version while meeting the same interface and performance requirements.

From there, we move deeper into the system and decode the cable that the backshell will be used with: M24643/31‑04‑UN. You’ll learn how to interpret its construction, conductor size, insulation types, shielding, and ensuring the cable fits properly through the backshell’s strain‑relief hardware.

Next, I decode the connector that mates with the backshell: D38999/26FC35SA. I walk through every element of this part number—shell style, service class, insert arrangement, contact type, keying, and more.

You will also learn how to properly confirm thread compatibility between the connector and the backshell (so they physically mate). I also cover how to evaluate the cable outer diameter, wire gauge, and contact size, ensuring compatibility between:

Cable OD ↔ backshell strain‑relief range
Wire gauge ↔ connector contact sizes
Thread class ↔ connector/backshell compatibility

At the end of the video, I walk you through how to locate the correct contact part numbers, crimp tools, wire‑size ranges, and Daniels Manufacturing Corp. (DMC) insertion/removal tools using the official Daniels tooling guide.

This video is perfect for:

✔ Aerospace & defense technicians
✔ Harness engineers
✔ Technologists supporting MIL‑Spec cable assemblies
✔ Anyone learning to navigate Glenair, MIL‑DTL‑38999, and M24643 standards

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