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Metric system gurus

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Pugsley, Oct 2, 2001.

  1. Pugsley

    Pugsley 1/2 ton status

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    What size nut/bolt takes a 15mm wrench? And what's the torque spec for that size(ballpark)?

    Of the 5 toughest dogs in the neighborhood, my cat's ranked #3
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  2. 74Roadster

    74Roadster Registered Member

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    That should be a 10 mm bolt...and the maximium torque value should be similar to a 3/8" bolt, maybe a shade higher.

    74 roadster in progress [​IMG]
     
  3. Pugsley

    Pugsley 1/2 ton status

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    Thanks!! I've been back to the hardware store twice getting the one that "looked" right, and wasn't it[​IMG] You ought to make up a wrench-bolt chart for those of us who are "metrically challenged"

    Of the 5 toughest dogs in the neighborhood, my cat's ranked #3
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  4. 74Roadster

    74Roadster Registered Member

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    After you've used metric fasteners for a while you appreciate the simplicty of the system. There is no fine thread, coarse thread or really odd sizes. 10 mm bolt is plainly M10...nice and simple

    74 roadster in progress [​IMG]
     
  5. Triaged

    Triaged 1/2 ton status

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    The only prob. w/ metric (other than needing more tools to do the same stuff) is that there is no "set standard" for bolt/nut size. I have seen many metric fastners that are the same thread but have a different size head. With SAE it is always the same.

    '71 Blazer CST w/ a 400sbc, 4" lift, 36" Supper Swampers, and alot of rust
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  6. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    So you need fewer taps and dies, but more wrenches...[​IMG]

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
     
  7. Blazer1970

    Blazer1970 1/2 ton status

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    There are both coarse and fine thread metric fasteners.

    Tim

    70 Blazer CST 4X4 350 SM465 NP205
    87 Burb 4X4 350
    01 GMC 2500HD 4X4 Duramax/Allison
     
  8. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    On German and european vehicles that may be true but my Supra is full of weird pitch metric bolts including the lugnuts on the wheels. They are between the standard and coarse thread. I went to 4 tire stores trying to find replacments. Found several that looked right on to get them on about 2 turns before the threads bound up. Had to go to Toyota and bring some KY. They nailed me $8.75 a lug nut!
    I grew up wrenching VW and Porsche. It always made sense. 17mm for lugs, 10 mm for light weight items like coil bracets and 13mm for any stuff that needed to be soild like Alternator mounts, intake bolts. Stupid Toyota most stuff is 12mm or 14mm with soft headed 8mm stuff all over the place.

    I don't need no damn shop manual, I got a pornographic memory.
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    75 Jimmy, Dollar
    Grim-Reaper
     

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