Lotus Elan

Thread for rear light bezels

PostPost by: fattogatto » Sat Aug 11, 2018 11:34 pm

I am replacing my chrome rear light surrounds on a 1967 S3. Does anyone know the proper thread size for the screws that hold the ally plate to the surrounds, capturing the lens? I've tried all I have. On disassembly the old surrounds were held in by sheet metal screws which cut their own threads. Is this standard practice? It appears there are threads cut in the new pieces.

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PostPost by: CBUEB1771 » Sun Aug 12, 2018 2:38 pm

BA threads are common in electrical components, perhaps 4BA (0.142" diameter, 38 tpi)? Self-tapping screws would not have been used, that is probably a DPO quick fix.
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PostPost by: fattogatto » Sun Aug 12, 2018 2:59 pm

Thanks
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PostPost by: 512BB » Mon Aug 13, 2018 5:09 pm

Its 2BA Fatso.

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PostPost by: NickD » Mon Aug 13, 2018 8:34 pm

The screws which attach the light to the car are 2BA, but the screws attaching the back plate to the surround are much smaller, and on mine were also self-tapping screws
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PostPost by: 512BB » Tue Aug 14, 2018 7:02 am

Sorry, I really must read the question a dozen times, instead of the half dozen times that I did before answering. I was refering to the chromed screws that fasten the lens to the chrome surround on S4's and Sprints. Not remotely what the OP asked for.

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PostPost by: fattogatto » Tue Aug 14, 2018 4:06 pm

Thanks for the replies. I'll try tapping the surrounds to 6-32. If that's too small then 8-32. The chrome is soft enough and then use a bit of Loctite to secure.
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