For what it's worth, here in the U.S. McMaster-Carr has M3.5 x 0.6 pitch screws?

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-Pat
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> ------ Original Message ------
> From: setton@...
> To: [email protected]
> Sent: Tuesday, March 18th 2025, 06:07 AM
> Subject: Re: [HP-Agilent-Keysight-equipment] Threads for screws on 8656 Siggen
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If it's indeed M3.5 x 0.6, it's the same size as the hardware used on the recent HP-IB connectors, the ones with black screws (early HP-IB connectors used uncolored stainless steel 6-32 American hardware). You can check for compatibility with the screws on an HP-IB connector.
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This is indeed a metric size, but a very unusual one which is not easily found, even here in Europe. Very few hardware vendors have them, one of them is here :

(no affiliation with them).

I hope this helps !

Joel Setton