smart51
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| posted on 29/4/18 at 06:23 PM |
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What size bolt is this (VERY small!)
I've lost a nut off my glasses and as a nut is likely to be cheaper than a new pair, I'll fix them. The trouble is, I'm not that
familiar with tiny thread sizes. The bold is 1.31mm measured across the thread. What size is it? M1.6 or could it be an imperial size?
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40inches
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| posted on 29/4/18 at 06:32 PM |
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Take them to your opticians, they replaced a screw on mine for free 
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smart51
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| posted on 29/4/18 at 06:49 PM |
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They are off the shelf reading glasses, not prescription lenses. I doubt they'd have spares. Nice idea though.
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BigFaceDave
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| posted on 29/4/18 at 07:12 PM |
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Can you improvise? I lost one of the screws out of mine and now both sides are held in with mig wire bent over top and bottom! They’ve been like that
for about 2 years no problem.
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Ugg10
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| posted on 29/4/18 at 07:26 PM |
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Wild guess, 12BA has an od of 1.29mm so pretty close.
---------------------------------------------------------------
1968 Ford Anglia 105e, 1.7 Zetec SE, Mk2 Escort Workd Cup front end, 5 link rear
Build Blog - http://Anglia1968.weebly.com
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SteveWalker
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| posted on 29/4/18 at 07:47 PM |
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I'd still try an optician - they usually stock a variety of bits to try and repair many different types of glasses. I've never been
charged for such a repair either.
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jps
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| posted on 29/4/18 at 10:01 PM |
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quote:
Originally posted by BigFaceDave
Can you improvise? I lost one of the screws out of mine and now both sides are held in with mig wire bent over top and bottom! They’ve been like that
for about 2 years no problem.
Paperclips work too in my experience...
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907
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| posted on 30/4/18 at 06:45 AM |
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Like others vote optician as well, unless they are from the pound shop in which case I would buy another pair and rob the screws
from them and throw the rest away.
My mate buys his glasses from the pound shop. His eyes are such that he cannot read the figures on his car speedo  ,
yet can afford to go on 3 or 4 cruises a year. At this moment he's in the Norwegian Fiords, not that he can see them. 
Paul G
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steve m
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| posted on 30/4/18 at 07:17 AM |
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One of my local poundshops had a glass's kit, screwdriver and screws kit for a quid,
but my eyesight wouldn't be up to fiddling with those tiny screws!
Now at my age even 5mm bolts are tricky
steve
[Edited on 30/4/18 by steve m]
Thats was probably spelt wrong, or had some grammer, that the "grammer police have to have a moan at
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nick205
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| posted on 30/4/18 at 08:19 AM |
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I'd start with an optician as well even if they didn't supply the glasses.
SWMBO wears glasses and has had the same problem. Our local Specsavers have helped more than once for free.
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coyoteboy
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| posted on 30/4/18 at 11:52 AM |
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We work with M1, M1.6 and M1.7s fairly regularly, could be any of those.
There's also the japanese screw standards for watches/glasses/optics. (JCIS)
http://www.japanesescrews.com/sections/screw-threads.html
Looks like it might be a 1.4?
[Edited on 30/4/18 by coyoteboy]
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ReMan
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| posted on 30/4/18 at 01:10 PM |
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yes i was surprised as even a high st optician, just fixed mine for free and I was happy to pay
www.plusnine.co.uk
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jacko
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| posted on 30/4/18 at 04:40 PM |
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Whats wrong with a plaster like jack of you know what show
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smart51
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| posted on 2/5/18 at 04:51 PM |
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Typical
I bought a repair kit off ebay for a couple of quid. Nut spinner, pair of screwdrivers and a whole set of nuts, bolts and rubbery nose pads. So I
went to the garage where I'd left the glasses after threadlocking 3 of the 4 nuts, only to find the lenses smashed. One had a big chunk missing
and the other was cracked. Are plastic lenses attacked by threadlock? Could I have overtightened such a small screw enough to crack several mm thick
plastic?
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obfripper
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| posted on 2/5/18 at 06:04 PM |
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Polycarbonate is affected by direct contact and the vapours from uncured threadlock, causing cracking and embrittlement.
Other plastics and resins are also affected, there are special threadlocks for plastics.
Dave
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gremlin1234
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| posted on 2/5/18 at 09:10 PM |
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a lot of the very tiny screws in spectacles are locked by 'deforming' the ends on the thread, and often have a central hole that a punch
may be used
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