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MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG TD TF 1500 - Brake line fitting threads

What is the correct threading for the flare nuts on myTD's brake lines? Searching the net I find no agreement as to whether it is BSF or UNF, I suspect UNF but would rather not guess.

Also, the nuts seem to come in 3 sizes, short, long, and a medium. Any thoughts on which size, or assortment of sizes, would be best for a TD?

BTW I have been pricing the supposedly rust proof Nicopp/Cunifer tubing, and notice the price for a 25' roll varies from $60 plus shipping from the specialty houses to $29 with shipping on ebay. Now if I could just find a cheap source of the fittings in something a bit more rust resistant than steel at a reasonable price, I'd be happy.

kylemorley

definitely BSF. These parts were designed before we in the UK used UNF.
Ray TF 2884
Ray Lee

Kyle, see http://www.fedhillusa.com/ . They're down in this neck of the woods and really know their stuff. Bud
Bud Krueger

I believe you'll find they're 7/16-20 US, at least that's what they are on a TC and a Y-type.

An article on wikipedia states "Automotive Products (AP) was an automotive industry products company set up in 1920....to import and sell American made components to service ex-military trucks left behind after World War I. In 1928 they obtained a license for the manufacture and sale of the Lockheed Hydraulic Braking System for the British Isles and continental Europe....".
Gene Gillam

Ray is spot on they are BSF. I have recently made new bolts for the banjo connectors out of brass and had to cut BSF threads. You will need a flaring tool for the pipe ends and if you don't have one it would be cheaper to simply buy a pipe kit.


Jan T
J Targosz

Agree with BSF Kyle. Definitely. I just purchased the flare nuts & solid line in Cunifer from Brake Connect in the States (a little cheaper than Fedhill) & I plan to replace my recently installed copper lines (which don't comply here) & all the flare nuts over Easter when I can borrow the flaring tool from my local mechanic. Cunifer is the state of the art brake line & it is essential that the lines are double flared. With a quality flaring tool & a little practice it's possible to do a perfect job. The nuts are about $1.42 each. 25 ft of line gives you plenty to play with. Do the longest runs first so if you do stuff up you can reuse it in another shorter location. Make sure both nuts are on before you flare both ends! DAMHIK. Cheers
Peter TD 5801
P Hehir

They are 3/8-24 (BSF) with DIN bubble flare. Bud


Bud Krueger

Gents,

Just finished a complete brake rebuild including all metal and flex lines throughout. Used the ready-made kit from Moss. All lines are precut and flared with appropriate fittings. The tubing is Copper/Nickel. What a joy to work with. It was a very satisfying job. Needed only a bending tool, steel tape. All lengths were accurate and fit as original. I recommend the kit wholeheartedly.

Regards,

Jim Haskins 1953 TD
J. M. Haskins

Moss kit is about $150 and a roll of copper nickle tube and a 16 nuts will cost me about $50. Fool that I am I can't resist, though I will doubtlessly - and spend two weeks on it after my nasty old flarer refuses to make double flares.

Oh, Ni Copp is the same thing as Cunifer, just another brand name for 10/90 nickel copper.
kylemorley

Cunifer gets its name from Cu (copper) Ni (Nickel) & Fer (Ferrous, Latin for iron). If you don't trust your old flarer Kyle see if you can borrow a good one. The new bottom end of the market flarers aren't much chop. Cheers
Peter TD 5801
P Hehir

Kyle, see https://www.youtube.com/watch?v=gfJmdZZr5GM for NAPA's inexpensive flaring tool. It worked great for me when I installed the booster system. I'd be happy to loan it to you. Just send me your snail mail address. I'd suggest reading FedHill's homepage article about the economy cunifer tubing before you buy the $25 roll. Bud
Bud Krueger

I've seen the "Fedhill brake line out-brakes the competition!" screed on the Fedhill website, where they claim that an unnamed competitors's product is .007 thinner that Fedhill/Cunifer, and hint that they are also lying about meeting DOT standards, if that's what you mean.

Hard to know what to make of it, whether it is well meant, timely warning or disparagement but AGS is apparently a big company selling a lot of NiCopp and since Fedhill doesn't mention them by name there is no reason to assume the bad stuff was theirs.

Think I'll give AGS a call, though, and find out what their wall thickness is before I order!

Thanks for the offer of a flare loan, but I have a machinist buddy who hates to lend tools but owes me, so if I try to borrow his he'll probably insist on doing the flares for me.
kylemorley

Oh, I contacted AGS and they swore that theirs measures .028 wall thickness, same as the Cunifer.
kylemorley

This thread was discussed between 16/02/2015 and 18/02/2015

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