Brake line flare nut thread size/part id help

[MK667]

Hi folks, so I have a 2004 FX4 4.0. I'm doing my rear brakes right now and I was trying to get the old driver side cylinder out and I just cannot get this brake line to budge. I've used penetrating oil and heat, and that worked on the passenger side. Also this nut that threads into the back of the cylinder is complete rounded. Time for new lines. The threads size on the cylinder is 3/8-24 and it's a 7/16 head on the nut. I have 2 questions. Do any of you know the thread size for the nut that screws into that block looking thing over the rear diff? Also, what is that part over the rear diff that driver and passenger side hard lines screw into called? If i have a name i can doing some more searching. Thanks in advance.

 

[Uncle Gump]

That is not a 7/8 wrench size.

Try brakel line distribution block.

I also believe the line nuts are the same size on bothe ends.

 

[pjtoledo]

the block is part of the rubber line coming down from the frame.
search for the line, block comes attached to it.

 

[Uncle Gump]

the block is part of the rubber line coming down from the frame.
search for the line, block comes attached to it.

You are right...

 

[MK667]

That is not a 7/8 wrench size.

Try brakel line distribution block.

I also believe the line nuts are the same size on bothe ends.

Doh! You're right. It's 7/16. The other side of that flare wrench is 3/8. Got my wires crossed. The nut that goes into the wheel cylinder that is 7/16. The ones in this picture i was able to slip a 12 mm over. I think maybe they were originally 11, they just have a bunch of crud on them. I'll check distribution block. Thanks!

 

[fixizin]

Both the clip and the distribution wye/"Y" block are part of the "Rear Center brake hose" <<--(search string)... will be doing mine soon too... better view:

JUST did my rear-axle hard lines last week, and while wrench-dimensions for the bleeders were "variable" between 3/8" and 10mm (due to crud and/or rounding?), mercifully ALL the flare nuts were 3/8-24 threads (SAE) and 11mm (metric) on the wrench-hex... go figure.