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WANTED: info for source of fine-thread bolts

Steve

Steve

GS Whisperer
As the title says, I am looking for a source for some fine-thread machine screws, actually.

Very specifically, I need M6 x 25 or 30, with a 0.5 thread pitch.

I have done the usual searches on the internet, have found only a couple of likely sources. Two phone calls later, one said they could not help me, the other one said he would see what he can find.

I have a project in mind that will use these in groups of three, so I need a minimum of three, and, depending on price, can go for 24 or more.

I am looking for an aftermarket source, as the OEM for the original product wants $18.95 each. :eek:

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Steve said:
Sure, go ahead. :p

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Click to expand...

what project are you working on steve? :)

i have searched and i cant find any 6x0.5mm thread bolts or set screws.
are you sure it is 0.5mm pitch?

i can find 6x0.5mm taps and dies so something must use it somewhere! :confused:
 
Possible to make your own fasteners? If that is "standard fine" I believe my Harbor freight tap & die set has that size.

I recently used it to turn more thread on some 8mm brake disk bolts so they are a reasonable quality it seems.

As someone else said above, possible to drill out & tap larger?
 
almarconi said:
Is it possible to tap the hole to a more common size?
Click to expand...
Yes, it's technically "possible", but far from practical.


Agemax said:
what project are you working on steve? :)

i have searched and i cant find any 6x0.5mm thread bolts or set screws.
are you sure it is 0.5mm pitch?

i can find 6x0.5mm taps and dies so something must use it somewhere! :confused:
Click to expand...
Yes, it's used "somewhere". You have several of them in use, yourself. :eek:

I am working on replacing the sync screws on the carbs. Yamaha uses the same diameter/pitch screws as Suzuki, but they are a Phillips head pan head screw with a tension spring, much like the idle speed adjuster on the GS. Because it's for the sync screws, I feel that I need to retain the fine thread.

As much as I hated to do it, I only looked at Bike BANDIT for pricing. I have not yet established any sources for Yamaha parts, like I have for Suzuki. BB says "retail" price is $20.85, their price is $18.95. To add insult to injury, the tension spring is another $8.49. Multiply that by three sync screws per carb set, you are looking at $88.32 per bike. :eek:

I can get springs at ACE Hardware, so I am just looking for some screws without getting screwed.
icon_eek.gif


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Agemax said:
dont suppose you have a yamaha part number?
Click to expand...
Yamaha part number is 12R-1490K-00-00



Agemax said:
could it be one of these??????

http://www.ebay.co.uk/itm/Yamaha-NO...rcycles_Parts_Accessories&hash=item27b8e66336
Click to expand...
It looks quite a bit like that, but the part number does not match.



JEEPRUSTY said:
http://www.boulevardsuzuki.com/fich...ry=Motorcycles&make=YAMAHA&year=1986&fveh=177
Click to expand...
It's not for the kid's Venture.


Where I saw these screws and got the idea is on an XS1100. Unfortunately, some of the vendors do not carry much from that time frame, and I don't know what newer bikes had similar screws. I have threaded the XS1100 screw into the GS carb, it fits perfectly.

The Yamaha parts department at Babbitt's is called yamahapartshouse.com. They have the screws for 'only' $13.83, but that's still too much for that small an item.

EDIT: I just did a reverse search on the part number. Evidently it was used on virtually every Yamaha that had multiple carbs, from the '78 XS650 through the '97 Phazer SS and Venture XL.
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Thanks, Al.
icon_thumbsup.gif


I did not see any metric sizing in the screw blanks, but you did give me another idea. :eek:

Why not get some longer M6 bolts from the hardware store, cut off the 1.0 pitch threads, then put on my own 0.5 pitch threads?
icon_shrug.gif


Might cost a buck or two per bolt/screw, but that's a LOT better than the $18-20 from the vendors. :-\\\

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That sounds like a plan, another option if you are making set screws is to purchase a piece of M6 drill rod. Grainger or mcmaster carr should have it pretty cheap. M6 is a pretty common size screw, I would think you could pick up a box of 25 or 50 screws from mcmaster carr pretty reasonably.
 
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