flexible brake lines

[street]

My plus 2 was rebuilt 89/90. What thread do you think was the most probable at that time for the rear flexi's to hard lines as i need to replace.

SJ050J0005 - BRAKE HOSE SJ sports car lotus parts number, description does not have thread reference. As im In NZ, need to obviously get it right as most of the spares market here is American.

thanks

[prezoom]

On my 72 Plus2 all fittings are 3/8"-24.

[alan.barker]

Hi Street,
As far as i know there is a garage in Auckland that works on Elans
Alan

[RichardHawkins]

Street,

3/8”x24 tpi (3/8”UNF) and 10mm x 1mm pitch are very similar, both are used in braking systems, I have seen these two systems mixed up. Measure carefully and use thread gauges to check the pitch.

Richard Hawkins

[alan.barker]

I think the mix only comes as far as i know with the 16pb front Calipers on the later +2 cars.
On the connections yoy can sometimes see the "contiguous" circles for unified or maybe "m" for metric
Alan

[smo17003]

Street,

3/8”x24 tpi (3/8”UNF) and 10mm x 1mm pitch are very similar, both are used in braking systems, I have seen these two systems mixed up. Measure carefully and use thread gauges to check the pitch.

Richard Hawkins

Richard is absolutely correct, I have found having a set of thread pitch gauges incredibly useful. Far better than trial and error when you have an unidentified fastener.

[alan.barker]

If you want to go farther you can use thread parrellels or wires and measure effective dia with micrometer.
Alan

[pharriso]

Trying to measure pitch of a thread when they are close is not easy - why don't you buy a 3/8”x24 (unf) bolt & 10mm bolt & try them? You will have to bleed that brake afterwards, but not a biggy... .

[alan.barker]

Hi Phil,
Good point but be careful i think one will go inside the other but is a sloppy fit (e.g. wrong).
Alan

[512BB]

'On the connections yoy can sometimes see the "contiguous" circles for unified or maybe "m" for metric'

I think you mean on the brass banjos Alan. I have seen the 2 circles markings on them but did not know what they meant. I have learnt something today, and there was I thinking I knew it all

Leslie