7mm and 8mm left hand thread bolts: Just For Fun Off Topic  -- Current Events Health Happiness Discussion Forum and Review 7mm and 8mm left hand thread bolts: Just For Fun Off Topic -- Current Events Health Happiness Discussion Forum

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Discussion Boards > Active Subjects > Messages as Posted > Just For Fun Off Topic Forum

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 08-12-2005, 15:31 Post: 114769
jonesiera



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 7mm and 8mm left hand thread bolts

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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 08-12-2005, 16:03 Post: 114771
kwschumm



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 7mm and 8mm left hand thread bolts

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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 08-12-2005, 16:13 Post: 114772
jonesiera



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 7mm and 8mm left hand thread bolts

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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 08-12-2005, 16:30 Post: 114773
kwschumm



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 7mm and 8mm left hand thread bolts

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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 08-12-2005, 16:38 Post: 114774
jonesiera



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 7mm and 8mm left hand thread bolts

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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 08-12-2005, 17:18 Post: 114779
Murf

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 7mm and 8mm left hand thread bolts

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, Laughing out loud.

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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 08-12-2005, 17:28 Post: 114780
jonesiera



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 7mm and 8mm left hand thread bolts

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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 08-12-2005, 19:47 Post: 114784
Hettric



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 7mm and 8mm left hand thread bolts

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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 08-15-2005, 09:46 Post: 114889
Murf

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 7mm and 8mm left hand thread bolts

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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 08-15-2005, 13:09 Post: 114901
jonesiera



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 7mm and 8mm left hand thread bolts

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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