Engineering notes

Dated notes on designing with MIL-SPEC circular connectors: why a detail of the specification matters in a harness or a panel, with original illustrations and the specification paragraphs each value comes from. Newest first. For step-by-step help with a part number, see the guides.

Wire splices and circular mil area

Five kinds of splice with their pluses and minuses, and how to add up circular mil area when several wires share one barrel.

25 October 2026 · Read note Backshell clocking and anti-rotation teeth

Why an elbow backshell only points in fixed steps, how the key position shifts those steps, and why the same teeth carry the ground path.

16 October 2026 · Read note

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