The outlet on my twin master cylinders is 3/8 UNF. I bought some standard male 3/8 brake pipe fittings but when i test fitted them the screwed all the way in and ran out of the thread (I didn't have a bake pipe and flair on so that will give me another couple of mm) but wanted check I have the right fittings. I can't find any longer ones on ebay so hoping a flair on the pipe will allow it to tighten up

The ones I bought were these.

B574/5 Brake Pipe Nuts 3/8' UNF x 24tpi Male Quantity 5 | eBay

Also any cheap options for the inlet fittings which are 7/16 to convert to push on hose to the resevoir.

Cheers