I've accidentally lost the bleed valve in a front-brake "bleed gone wrong" afternoon and was wondering whether there's anything detrimental in just using a 6mm bolt instead for the time being?

  • what brakes are you running? – Batman Aug 8 '14 at 13:18
  • Shimano Deore M556, quite retro now I think. – David Wadge Aug 8 '14 at 15:07
  • Sorry got to ask. Why did you take it out? – paparazzo Aug 8 '14 at 15:37
  • I would guess that you need either a bolt with a tapered end or a gasket of some sort, in order to achieve the proper seal. – Daniel R Hicks Aug 8 '14 at 18:58
  • @DanielRHicks I reckon plumber's threadlock teflon tape should do the trick of sealing just fine. Works well on DOT systems, and I doubt teflon has issues with mineral oil. – moshbear Aug 10 '14 at 12:34

Well you won't be able to bleed your brakes for one thing. You can buy bleeder screws at auto parts stores. I've never bought one, but 6 mm sounds like a normal size. I'd check there.

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