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  1. #1
    la vache fantôme phantomcow2's Avatar
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    water bottle cage bolts

    Well this stinks. Im trying to remove the water bottle bolts that came with my frame, all allen head. Usually these things call for a 4mm wrench so i give that a go. Too big, so i figure okay well this is odd perhaps a 3mm. So i put that in and you guessed it...too small. So this leads me only to conclude that the head calls for a 3.5mm. Ive heard of these, so where might i go about finding one? Can somebody direct me?
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  2. #2
    It's so cold out there... scroz's Avatar
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    Imperial sized spanners are in between metrics

  3. #3
    I couldn't car less. jeff williams's Avatar
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    SAE set - Not metric.

  4. #4
    or lose it
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    probably a 10-32 allen head machine screw
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    pedal faster or get out of my way

  5. #5
    la vache fantôme phantomcow2's Avatar
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    what? So what do i need to buy?
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  6. #6
    Older Than Dirt
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    You need a set of SAE, not metric hex keys. Any hardware will have this.

    As information metric hex keys are sized from smallest to larger: 0.71 mm, 0.89 mm, 1.27 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm and then each full mm.

    Doc
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  7. #7
    la vache fantôme phantomcow2's Avatar
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    and this will fit the hexagonal head on this ridiculous bolt?
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  8. #8
    Gone, but not forgotten Sheldon Brown's Avatar
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    Quote Originally Posted by phantomcow2
    Well this stinks. Im trying to remove the water bottle bolts that came with my frame, all allen head. Usually these things call for a 4mm wrench so i give that a go. Too big, so i figure okay well this is odd perhaps a 3mm. So i put that in and you guessed it...too small. So this leads me only to conclude that the head calls for a 3.5mm. Ive heard of these, so where might i go about finding one? Can somebody direct me?
    It's probably a 1/8" size. Any hardware store will be able to supply one.

    Bottle cage bolts are normally 5 x .8 mm (a.k.a. "M5") threading. As it happens, this size is semi-interchangeable with the S.A.E. #10-32 size, so it is not uncommon to find S.A.E. bolts used for this application.

    Sheldon "Remember Inches?" Brown

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  9. #9
    la vache fantôme phantomcow2's Avatar
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    Quote Originally Posted by Sheldon Brown
    It's probably a 1/8" size. Any hardware store will be able to supply one.

    Bottle cage bolts are normally 5 x .8 mm (a.k.a. "M5") threading. As it happens, this size is semi-interchangeable with the S.A.E. #10-32 size, so it is not uncommon to find S.A.E. bolts used for this application.

    Sheldon "Remember Inches?" Brown

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    Okay so if i go to a hardware store and ask for 1/8" S.A.E. it should work? And what does SAE stand for by the way?
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  10. #10
    I couldn't car less. jeff williams's Avatar
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    Quote Originally Posted by phantomcow2
    Okay so if i go to a hardware store and ask for 1/8" S.A.E. it should work? And what does SAE stand for by the way?
    Buy a set, not a single I advise. You may need SAE hex keys for other bolts you come across.
    Good to have both sets in the toolbox.

  11. #11
    Ferrous wheel
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    I have a set of metrix hex keys that came with a 3.5.

  12. #12
    la vache fantôme phantomcow2's Avatar
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    alright i ordered a set of SAE kits Jeff_Williams advised. I figure i might as well have them, theres no such thing as too many tools . Hopefully this will work. If not, i will hunt for that 3.5mm. Or better yet maybe my instructor at school will let me bring home the micrometer for a day
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  13. #13
    Hardtail WorldWind's Avatar
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    Society of Automotive Engineers

  14. #14
    Senior Member DieselDan's Avatar
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    Quote Originally Posted by spider-man
    I have a set of metrix hex keys that came with a 3.5.
    Those old Campagnolo Delta brakes required a 3.5mm for adjustments.
    Bikes use brakes to stop.

    If your bike has breaks, don't ride it.

  15. #15
    hateful little monkey jim-bob's Avatar
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    Quote Originally Posted by DieselDan
    Those old Campagnolo Delta brakes required a 3.5mm for adjustments.
    Why bother? It's not like they'd stop you anyway.

  16. #16
    Senior Member Brian's Avatar
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    Quote Originally Posted by jim-bob
    Why bother? It's not like they'd stop you anyway.
    Takes me back to my road bike days. The guys that actually wanted to stop used Shimano. I was happy enough to slow down, so Campy was good enough for me.

  17. #17
    Gone, but not forgotten Sheldon Brown's Avatar
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    Quote Originally Posted by phantomcow2
    Okay so if i go to a hardware store and ask for 1/8" S.A.E. it should work? And what does SAE stand for by the way?
    Just ask for a 1/8" Allen wrench, or a "standard" Allen wrench set.

    S.A.E. is the Society of Automotive Engineers, they set a lot of standards for mechanical parts and tools.

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  18. #18
    Senior Member DieselDan's Avatar
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    Quote Originally Posted by jim-bob
    Why bother? It's not like they'd stop you anyway.
    LOL
    Bikes use brakes to stop.

    If your bike has breaks, don't ride it.

  19. #19
    I couldn't car less. jeff williams's Avatar
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    Quote Originally Posted by phantomcow2
    alright i ordered a set of SAE kits Jeff_Williams advised. I figure i might as well have them, theres no such thing as too many tools . Hopefully this will work. If not, i will hunt for that 3.5mm. Or better yet maybe my instructor at school will let me bring home the micrometer for a day
    They are handy for fixing things like...cars. Shhh!

  20. #20
    Senior Member Ziemas's Avatar
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    Your local Sears should stock all that you need. I have a Craftsman set that includes half sizes in metric. And if you ever need to torque the billy hell out of anything, Sears has a great return policy on Craftsman. And it's a fraction of the price of Snap-On...

  21. #21
    cab horn
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    Aww come on, a full SAE set of hex keys in a folding tool is like five bucks at walmart.

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