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Screw thread for a camera

The daughter of a friend has a Fujica STX-1 camera and has lost the film wind lever. I have made a replacement lever, but have drawn a blank on identifying the thread of the screw that retains the lever on the winding spindle. By using drills as gauges, as near as I can measure, the core diam. of the screw is 1.9mm and the outside diam is 2.3mm. By screwing a soft metal rod into the spindle and measuring the thread that gets formed, it appears that the pitch is about 0.33mm. Non of my thread charts show a match, so can anyone help identify it please? By extreme good fortune, could anyone actually supply such a screw? There is a major complication; the daughter is due to emigrate to New Zealand next Saturday, so I don't have much time..

-- Regards, Gary Wooding

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Wooding
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Is it 2.3 Metric Fine pitch .25 or .35

Lionel

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Lionel

ISO metric fine

2.2mm pitch 0.25 minor diameter 1.628 to 1.525

2.5 mm pitch 0.35 minor diameter 1.928 to 1.825 possible match ??

BA is to course ( 8 BA = 2.2mm, pitch 0.43 mm )

Hope this helps

-- Jonathan

Barnes's theorem; for every foolproof device there is a fool greater than the proof.

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Jonathan Barnes

A few tables for metric threads from my favourites folder.

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This might be worth printing out.
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Lionel

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Lionel

Thanks Lionel, That was very useful. I eventually made a brass screw with 2.3mm OD, metric thread form and 72tpi. (I don't have metric screw cutting on my lathe) which gave me a pitch of 0.353mm. After about 3 turns it tightened up a bit in the camera, but not enough to cause concern - it actually made it less likely to work loose. It did the job, I hope, and the camera is usable again..

-- Regards, Gary Wooding

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Wooding

Good to hear, and Johnathan came in with a couple of good suggestions too.

Lionel

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Lionel

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