What's the specification of the end of the flexible hose that goes into the clutch slave cylinder? I'm having troubles finding one, because what I pulled out is an M10x1 male with a convex flare, and all the ones I'm finding in local stores are M10x1 with an inverted/concave flare. But maybe what I have isn't a standard convex flare but an ISO bubble flare in a solid fitting. I've looked at the relevant datsun1200 tech wiki page, and at least one of the parts listed there is an inverted flare on the slave cylinder end (coz I found it at a local store.) In my particular situation I could just run a new hard line all the way to the clutch slave cylinder, but even then I need to know what the right flare geometry is.
Suggestions/ideas?
Thanks in advance.

Are you just trying to replace the hose? It should be the same as the Rear Brake Hose.
http://www.rockauto.com/catalog/moreinfo.php?pk=304537
That M10x1 end should have a copper washer.

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  Rear Brake-Clutch Slave Hose.jpg (68.13 KB)


  LHD Clutch Slave Cyl.JPG (54.72 KB)

Interesting.
That is definitely not the same as the end that came out of the slave cylinder, but it is the same as all the hoses I've been given trying to order new ones.
Now I'd better go look down in there and see what the slave cylinder end looks like. I'd assumed that the hose that came out was the right one.
I bet the previous owner just grabbed a random brake line that threaded in and cranked it down REALLY HARD until the copper washer acted as the seal. Which is probably why the hydraulic clutch always leaked and needed refilling.

Thanks!