Tool Time

[Spencer123]

That’s so good to know. I actually feel the sram one I have seals better (I am assuming because of the O ring) and have been using it even though I have both. Good to know it can do some damage, will be switching back!

The threads of the fittings are the same, but the smooth piece below it & tapered tip are different lengths, at least in the current SRAM Pro Bleed Kit. So it will work in an emergency but not seal great, and it's possible to advance the SRAM ones past the bottom of the Hayes bleed port threads and fuck things up. Ask me how I know...

That said, the fittings in the Park Tool DOT bleed kit work fine.

[Andeh]

With the Hayes one, they rely on bottoming out to fully seal. In their video, they say to tighten with fingers, then use a Knipex or something to give it just a little bit more to bottom out the conical tip on the machined recess in the bleed port.