Need help identifying rear brake lines and - are these adapters?

They should be a metric fitting.

Scott at SACC Restorations has the longer braided flex lines to move the hydraulic calipers to the front of the hub.

Pantera Stainless Steel Flexible Line Kit for Big Brake Kits (saccrestorations.net)

That is an original flexible brake line. It extends through the engine bay’s sheet metal where the hard brake line couples to it with a female nut. The flex brake line is secured to the sheet metal with a jam nut.

On the caliper there is an adapter that connects to the flex brake line. It uses copper crush washers for sealing. Your new flex brake line probably will not use the adapter.

Sorry, I don’t know the the thread size or coupling types  

I should add that the flex brake line to hard brake line connection is a typical 3/16” inverted flare.

Thanks guys. Good to know.
I'll reach out to Scott at SACC.
Cheers

-John

Looks like a -3 AN female/female braided stainless steel line to me. If Jon Haas can't tell you what length you need, I'd mount the caliper in the new position, measure and order accordingly.

Here's a good source for such things:

https://www.anplumbing.com/pre...de-3-ptfe-hoses.html

After looking  closer I agree with David that the flex lines may be braided stainless replacements.  The  coupling nuts on the lines do not look original.

A 16" long U.S-made flex hose frt & back seems to fit most Panteras. I always called that odd little double-female fitting an 'extension'. Yes- the sizes are the euro version of AN-dash-3 both hard line & flexible. And when one guy bought the whole Gr-3 brake system complete from DeTomaso ($$$$), all 4 new calipers  came with those same crimp-end stainless flex hoses direct from Italy. I installed the system- easy 4-hr job including new wide rotors, Gr-5 type calipers, new booster & master cyl.

I checked and the flex line is around 16 inch as per Bosswrenche's comment.

Here is a shot of it installed. I think the coupling nuts are original.

Thanks guys! Super helpful as always.

I'm losing my mind...
Do I have the wrong calipers or am I missing a step?

The connector is very close to the U-joint. There's no way the cable connector could attach there. @Percy 's picture shows the connector flipped to the other side. (This is the left side)

jmardy, you need to "flip" the electric motor 180 degrees.

Thanks David.
Duh. :facepalm
I was just a little hesitant to crack them open.
Pretty neat design.
In case someone digs this up in the future, here's what it looks like:
Unbolt them in this orientation so the metal disk and the three little gears don't fall out and roll way far away under the far corner of your workbench.

Good tip - that happened to a friend of mine ......!!

After looking at the photo that Percy posted, ordering your new hoses with a 90 degree swivel fitting for the caliper end, would allow for  better hose routing.

Thanks David, I ordered them with 90's and 24" long.
ETA tomorrow. Will post results.

Here's what I ended up with. I'm pretty happy with it.
Pegasus Racing 3AN 24" straight to 90.
I tried a couple different routes, this one seemed the best:

Good route choice - the extra length provides the up and over option that also gives a that bit of extra protection to the line. With the shorter line there is little choice of route. The right angle end is also good and doing it again I would certainly do that as a minimum.

Looks good !