mirafone valve screw solutions?

[bradadams]

missing screw on a mirafone tuba valve - does anyone know of alternative solutions? - cannot find the part - any help is appreciated!

[arpthark]

Which screw? There are a few, depending on the model.

[bloke]

Center/stem/stop-arm screws (unless a super-old tuba, and maybe even those as well) are M3x.5 thread.

non-oem lifetime supply (steel) $5.37 plus shipping:
https://www.mcmaster.com/90604A722/




oem single screw (nickel-brass) 4.00 plus shipping:
https://hornguys.com/products/miraphone-tuba-parts

[the elephant]

The cork plate screws are more of an issue as they are a size that is hard to find in the US. You won't find it at Ace Hardware.

M2.6x0.45

[bloke]

These may be a wee bit too long, and (me?) I'd prefer to pick the lock washers off of them...but (again) only a dime each for enough for an impressive fleet of Miraphonia...

https://www.ebay.com/itm/404953374935

more misc. info:

The EARLY 1960's carriage rod knurled nuts are ALSO this same smaller thread size whereby the more-recent ones are the M3x.5

Miraphone will still supply the old/smaller-size knurled carriage rod nuts to peeps like Wade and me...but (at least I'm not - other than macro - such as importing several new BELLS at one time offering only "dock pickup") I'm assuming that neither of us is interested in being a "minutia Miraphone parts dealer".

bloke "Rotary tubas play out-of-tune without knurled nuts on their carriage rods."