Electronics > Repair
screws, bolts and fasteners used on vintage TE
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tatel:
In my current case, I need to identify this set screw used on  F931B knobs.

I can undo most of them with a 1.5 mm hex key, but there are some more tight where the key slips.

Diameter seems to be 3.5 mm, so perhaps this is a metric set screw and the matter is I need better quality metric hex keys. Long is about 4.78 mm which looks a lot like 3/16 however. Then this would probably be an imperial screw and I would probably need a set of imperial hex keys, particularly a 1/16" one. I'm getting it anyway, but it would be nice to have confirmation about what kind of screw this is.

From a more general point of view, it would be nice if a compilation of different screws, etc, used in vintage Fluke, HP, Tektronix, (put your favorite brand here) could be made,with links to providers if possible, and compatible replacements. A little bit like the sticky threads on this section. Alas, I have been unable to find much about this matter in these useful threads.
mikeselectricstuff:
imperial allen keys go down to 1/64" increments
HalFoster:
Google Wiha hex key sets: 35392 Metric, 35393 Imperial.  Amazon has them and they are what I use for all set screws.
tatel:
1/64" increments? Wow, fine fine tangerine.

In looking at this: https://www.amazon.com/Bondhus-16936-Balldriver%C2%AB-L-wrenches-BriteGuard/dp/B000E7ZQ8U/ref=sr_1_15

Hoping they will be good enough.
George Edmonds:
If it is 3.5mm OD it could be 4BA which used Imperial keys

George Edmonds
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