Go Bottom7mm and 8mm left hand thread bolts
 | jonesiera
Join Date: Jul 2003 Posts: 187 Bedford,In 47421 
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2005-08-12 114769
Not sure whether it is 7 or 8 mm bolts I think it is the coarse thread. have no way of measuring the threaded hole. Impossible to find left hand threaded metric bolts where I live. Anyone know where I can purchase these?
Bob Jones
I didn't know where to post this. I hope this is OK!
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 | kwschumm
Join Date: Feb 2003 Posts: 5764 NW Oregon 
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2005-08-12 114771
The local Ace hardware will order most anything they don't normally stock, although usually with a one box minimum (box of 50). ....
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| jonesiera
Join Date: Jul 2003 Posts: 187 Bedford,In 47421
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2005-08-12 114772
Our Ace Hardware is unable to order as they have no source for left hand metic bolts. Its almost impossible to find these!
BJ ....
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| kwschumm
Join Date: Feb 2003 Posts: 5764 NW Oregon
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2005-08-12 114773
Have you emailed some of the fastener suppliers online about this? Maybe they can help. What's it for? As a last resort maybe you can drill it out and tap it oversize for an SAE size. ....
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| jonesiera
Join Date: Jul 2003 Posts: 187 Bedford,In 47421
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2005-08-12 114774
It's the bolt that holds the Flywheel on a( no name) 2 stage air compressor made in Italy. Woul have to drill in crankshaft which is hardened steel! ....
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 | Murf
Join Date: Dec 1999 Posts: 7249 Toronto Area, Ontario, Canada
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2005-08-12 114779
The other problem you're going to have is that in Metric threads there is no such thing as "course" of "fine". UNC and UNF are Imperial measures only.
The bolts are all sized according to a MAA X BB type designation, the AA being the size of the bolt in milimeters, the BB being the thread pitch, again in milimeters.
For instance, a 1/2" UNC would be ABOUT the same as a M14X2.0 but not interchangeable.
They do have reasonably standard sizes, if it is a 7mm it is likely a M7X1.0, and if it's 8mm, it's likely a M8x1.25 but there's no guarantees, there are LOTs of different combinations, and the fact it is a left-handed thread won't help any.
I've got a thread measuring device, you're welcome to run over and use it, come on up, LOL.
If you figure out what it is let me know, I'll drop one in the mail to you from up here in Metric-land. That should keep Homeland Security busy for a few days.
Best of luck. ....
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Add Photo7mm and 8mm left hand thread bolts
| jonesiera
Join Date: Jul 2003 Posts: 187 Bedford,In 47421
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2005-08-12 114780
I think it is a 8mm x 1.25 The right handones on the pump are 8mm x 1.25 and it looks to be about the same, I can find the Right hand thread but eveyone laughs when I ask for left hand. One dealer said it would have to be made up special. With the majority of Compressor pumps made in Europe or Middle east and Flywheels running CC it seems to me that they would be available. I did find on the Pump (Made in Italy)
BJ ....
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| Hettric
Join Date: Mar 2004 Posts: 133 MA
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2005-08-12 114784
Much to my suprise, Mcmaster-carr does not list left hand metric bolts. But they do have left hand metric threaded rod, (plain steel-low grade) and nuts (stainless and high grade)
Hope this helps ....
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| Murf
Join Date: Dec 1999 Posts: 7249 Toronto Area, Ontario, Canada
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2005-08-15 114889
I'm not sure how far they are from you, but we deal with a supplier up here who has 2 US locations, one of them is in Michigan.
Bafasco
35906 Groesbeck Hwy.
Clinton TWP, Michigan
Tel: (586) 790-4400
If they don't have it they'll know where to get it I'm sure.
Best of luck.
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| jonesiera
Join Date: Jul 2003 Posts: 187 Bedford,In 47421
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2005-08-15 114901
Murf,
Thanks for the information, the guy's name that I talked to is Doug Jones. I knew then that I was in good hands. Really a nice group. My Son in Iraq ,is also named Doug Jones
www.brafasco.com
Thanks again!Bob
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