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One of the screws that connect the handle of the roof locking mechanism to the "lock" has rattled free and is now lost (1973 TR6)

According to Rimmers its a metric screw and I could order one from them but given it will cost several times more for postage than the price of the screw itself, and will take 3 days to get to me, I thought I might just go buy one locally. However, I can't find anything to tell me what size it is.

Does anyone know?

Thanks,

Steve

 

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Hi Steve,

          if you use the 4mm screw run it in gently.  As per Mike above I would have thought 8/32 or 8/40 would have been in keeping.

 

Wouild it be item #92  https://www.moss-europe.co.uk/shop-by-model/triumph/tr5-6/weather-equipment/hoods-hood-frames-fittings/hood-frame-fittings-tr5-6.html

this would be 8/32 (unc)

 

Roger

Edited by RogerH
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To add to Rogers comment:

UNC is entirely different from metric threads, any size, it is much coarser, and  that's what the "C" stands for :).
Maybe you could compare the other one you still have installed with the new screw.

UNC will have more grip, especially in aluminium-alloys.

Waldi

 

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According to the Moss website, the UNC screw was only used on very early TR5/250. The later cars and TR6 used the metric screw. 

I have a mid production TR250 and will check the screws today.

Cheers

Graeme

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22 minutes ago, Percy TR6 said:

Tried M4 but no joy ☹️

However, further examination has shown the original screw/bolt has sheared inside the latch mechanism so will try the other side and see how that goes. 

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The plot thickens, I had a look today and my TR250 has a 6/32 c/s screw. If this was later changed to a metric screw for the TR6, I would expect it to be 3mm

Cheers

Graeme

Edited by graeme
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I’ve removed the screw from the other side and I would guess it is 3mm not 4mm if metric. However, as I have been unable to remove the sheared screw from the pin/lock I have ordered a replacement pin & 2 screws from Rimmers. 

Thanks for all the input. 

Steve

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Final update... the screws which arrived from Rimmers are indeed M4, as is the new locking peg which they also supplied. 

However, the original locking peg is definately not M4 - Perhaps M3 if metric but more than likely UNC as previously suggested. 

Thanks again for all the thoughts and input along the way. 

Steve

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