$50 US bounty for 6.3mm x 1.0tp bolts. Euro members?
Guest
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In any case. Mdbuehler you have lots of information, and a few ways to make your project come together. Good luck with which ever path you choose.. Show us some pics when it’s done.
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SuperSport
Joined: Mar 2005
Posts: 758
From: Laurel, MD
You must have missed something. 6.3 is a metric designation for an SAE size, part of an ISO initiative to combine the two. The looseness tolerance applied allows a 1/4-20 bolt to fit into this 6.3x1 (nominal) thread, I think.
I thought what I said was clear. Sorry if it led you to confusion.
I thought what I said was clear. Sorry if it led you to confusion.
Guest
Posts: n/a
I have no doubt I did.
You led,, but I followed 
OK,, I get the GM deal of using an ISO suggested numbering system of 6.3mm for that years body fasteners.
And I understand the math that has been done to show that 6.3mm is very close to .2500" And more math that said the thread pitch of a 6.3mm x 1.0 fastener is close to that of the standard 20 TPI of a USS 1/4" fastener.
Someplace in the other thread on this topic,, the owner said a 1/4" 20 fastener did in fact start to thread,, but bound up partway in. Thus his continued search for the "correct" fastener.
As the topic interest me somewhat I'll continue to look in to it some more.... What the heck, I'm stuck at work, with nothing to do but wait for something to go wrong so I can fix it....LOL Might as well stay entertained.
Sorry if it led you to confusion.
OK,, I get the GM deal of using an ISO suggested numbering system of 6.3mm for that years body fasteners.
And I understand the math that has been done to show that 6.3mm is very close to .2500" And more math that said the thread pitch of a 6.3mm x 1.0 fastener is close to that of the standard 20 TPI of a USS 1/4" fastener.
Someplace in the other thread on this topic,, the owner said a 1/4" 20 fastener did in fact start to thread,, but bound up partway in. Thus his continued search for the "correct" fastener.
As the topic interest me somewhat I'll continue to look in to it some more.... What the heck, I'm stuck at work, with nothing to do but wait for something to go wrong so I can fix it....LOL Might as well stay entertained.
Senior Member
SuperSport
Joined: Mar 2005
Posts: 758
From: Laurel, MD
My point is that there is no other correct fastener. The 1/4-20 fastener he is using isn't cut with the correct (can't believe I said that!) looseness.
They've made a machining error that won't be corrected by finding the right machine bolt.
They've made a machining error that won't be corrected by finding the right machine bolt.
Thread Starter
Senior Member
Back Marker
Joined: May 2005
Posts: 216
From: Seattle, WA
Re: $50 US bounty for 6.3mm x 1.0tp bolts. Euro members?
Oh what fun 
Yup, the 1/4 20 goes in about 5 or six turns, then binds up.
I'll check with that supplier Monday, keeping in mind I need a grade 5 or higher. Running down a machine shop will have to start again Monday since I doubt any will be open today.
As the weather is going "nice" for the next week or so, I'll be putting the old front end back on the Hawk until I get this sorted. Need to ride!! Just ended the auctions for me selling them, so re-assembly starts tomorrow.
I'm in the OZ f'ed up catagory on this one. Makes noooo sense to me!
Yup, the 1/4 20 goes in about 5 or six turns, then binds up.I'll check with that supplier Monday, keeping in mind I need a grade 5 or higher. Running down a machine shop will have to start again Monday since I doubt any will be open today.
As the weather is going "nice" for the next week or so, I'll be putting the old front end back on the Hawk until I get this sorted. Need to ride!!
Just ended the auctions for me selling them, so re-assembly starts tomorrow.I'm in the OZ f'ed up catagory on this one. Makes noooo sense to me!
Senior Member
SuperSport
Joined: Jun 2005
Posts: 524
Re: $50 US bounty for 6.3mm x 1.0tp bolts. Euro members?
Early in this thread I questioned whether this might be a 1/4 inch bolt but listed the pitch at 24, I have since found out that I was wrong on the pitch but also found out that 1/4 by 28 does exist.
That is a metric pitch of .907 and might just do the job for you.
Kai Ju
That is a metric pitch of .907 and might just do the job for you.
Kai Ju
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