Can any one tell me what thread size is on Mini wiper Pivot shafts 68 on ? This is the Alloy shaft with the thin Chrome nut. It is a very fine thread.

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DID I MENTION THAT I AM THE BEST SUPPLIER FOR MINI ELECTRICAL PARTS AND REPAIRS?
"Let us remove your "SHORTS"

Not sure of size- (I can check tomorrow) but it is a very fine thread, you probably want a die to clean the shaft threads up with?
I just use a new nut with a hacksaw groove cut inside it- this acts as a poor man's die nut (the `shaft' threads are only soft alloy so this works fine).

I'll let you know the thread size and pitch tomorrow night.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Thanks Doc, I went to the engineering shop and they measure the thread for me. I needed to know the thread size. It is 5/8"26TPI.

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DID I MENTION THAT I AM THE BEST SUPPLIER FOR MINI ELECTRICAL PARTS AND REPAIRS?
"Let us remove your "SHORTS"

That thread type is called 'Brass'. (I actually suspected it was).

All 'Brass' theads have 26 tpi regardless of diameter.

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I suspected it would be 26tpi `brass' thread, regardless of the diameter.

Trivia- the metric system also has a `brass thread' equivalent, used on thin tube fittings (often in brass material, but not always). Very commonly used in Europe.
This pitch is 1.0mm, which coincidentally is 25.4 tpi, almost the same as the 26tpi Pommy original. It is used on various diameters, in the same way that the UK's brass thread is.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

I did only learn of this metric brass thread a couple of weeks ago. Just another to add to the other 28......

There is also a metric 'BSP', heard of that one? The Italians love it (god bless them).

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Yeah the next guy who tells me the metric system is simple will get strangled.
How about the 5 different pitches for a 12mm thread..

Yep pipe threads in the metric system are R-1/8, R-1/4, R-3/8, R-1/2, etc etc.
No prize for guessing what these threads are exactly the same as.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Yeah, for stuff under an inch, imperal is just so much easier, working in thousands. Stuff that new money stuff where the sun don't shine!

I alway found B.A. a bit odd though, until I worked out it was Imperial Metric! (eg 0BA = M6)

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They should teach thread systems to kids in high school- my pet hate is people who lose a UNF bolt in a Mini, then get an M8 or whatever and force it in where it doesn't belong.. eg the steady bar on back of the block.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

I think folk like that are in the wrong trade

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They used to - subject was called Engineering Science. But seeing as i left high school more than 20 years ago who knows if it still exists

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the world is a book, and those who do not travel read only a page
66 Mini Minor sponsored by http://www.lifeonthehedge.com.au/ The Dog Harness Specialists
It was a pleasure ausmini. I'll miss all you misfits and reprobates

In my garage, I have the following: UNF, UNC, BSC/CEI, BA, metric coarse, metric fine, BSF, BSW, brass and BSP. Plus the odd non-standard ones.

I tend to be a bit careful when I grab a bolt and try to shove it in a hole. Thread gauges, calipers and a thread chart are all standing by.

Tim

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1951 Morris Commercial J Type Van
1955 BSA C11G
1961 Morris Mini Traveller
1969 Triumph TR6R
1977 Leyland Moke Californian