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Wales
by Joske Vermeule, September 1
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Forums39
Topics49,877
Posts837,727
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Most Online1,063
Jun 14th, 2026
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There are no members with birthdays on this day. |
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Joined: May 2012
Posts: 1,796 Likes: 5
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: May 2012
Posts: 1,796 Likes: 5 |
Take the plug to a nut and bolt suppliers, they will tell you what it is.
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Joined: Jul 2013
Posts: 1,338
Has a lot to Say!
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OP
Has a lot to Say!
Joined: Jul 2013
Posts: 1,338 |
Yes i guess thats the best solution,its a hassle to drain close to 5 liters that are in the oil tank & store in containers..hope they can get the right measurement thread or else i will have to get the same bolt size & thread & dhl it to them
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Joined: Nov 2013
Posts: 786 Likes: 18
Talk Morgan Regular
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Talk Morgan Regular
Joined: Nov 2013
Posts: 786 Likes: 18 |
I'm on the size of the drain plug, same as me is making a play in turn from the second to put a drain tap 1/4 turn while bronze conical valve .
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Joined: Jan 2012
Posts: 14,976 Likes: 2
Member of the Inner Circle
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Member of the Inner Circle
Joined: Jan 2012
Posts: 14,976 Likes: 2 |
Why not buy a few bolts local and try them with your finger over the hole?
Richard
1976 4/4 4 Seater
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Joined: Jul 2013
Posts: 1,338
Has a lot to Say!
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OP
Has a lot to Say!
Joined: Jul 2013
Posts: 1,338 |
I drained the oil again.but i wanted to take a gambil & order 12 mm 1.75 but also 1.5 was on my mind.so instead of a 50/50 chance i ordered 2..image they arrive home & both dont fit  & well for the extra 1 we will find a fix for it on the hot rods maybe I will keep you informed
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Joined: Aug 2012
Posts: 154
L - Learner Plates On
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L - Learner Plates On
Joined: Aug 2012
Posts: 154 |
OMG! Has Mr. Whitworth been raised from the dead?
Allen
'69 4/4
Allen
'69 4/4 Four Seater
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Joined: Nov 2011
Posts: 382 Likes: 3
Learner Plates Off!
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Learner Plates Off!
Joined: Nov 2011
Posts: 382 Likes: 3 |
The image suggests the Verniers are incorrectly positioned on the bolt. The knife edge section on the calipers is possibly measuring the thread root diameter. Try measuring with the flat part of the caliper faces, thus measuring the thread diameter.
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Joined: Oct 2012
Posts: 2,822 Likes: 155
Talk Morgan Expert
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Talk Morgan Expert
Joined: Oct 2012
Posts: 2,822 Likes: 155 |
Parts book has it as an M12x16 hex head sealed with an M12 Dowty washer. Thread pitch should be 1.75 since they haven't specified otherwise. The drain valve looks like it will use a Dowty washer to seal against the tank but impossible to say for sure from their photos.
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Joined: Jul 2013
Posts: 1,338
Has a lot to Say!
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OP
Has a lot to Say!
Joined: Jul 2013
Posts: 1,338 |
We will just have to wait till 12mm 1.75 & 12mm 1.5 arrive and see what fits,plus i ordered thread gauge reader
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Joined: Nov 2013
Posts: 786 Likes: 18
Talk Morgan Regular
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Talk Morgan Regular
Joined: Nov 2013
Posts: 786 Likes: 18 |
M12-1.75 adapter for drain valve with thread 1/4 gas   it makes life easier
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