Bolt with "10" on the head

[ovrszd]

Good stuff everyone, thanks for the education.

Now what do you propose to the OP???

 

[bcp]

Some information here. Maybe more on their site.

Metric JIS hex bolts, Zinc plated class 8.8 steel - Bolt Depot

Bruce

 

[Agvg]

Most logical is to order bolts from a dealer, then you know you have the right part.

 

[Stimw]

For the OP, find another dealer and get the right bolts.
There are so many dealers that sell and ship parts.
Putting a generic bolt in could damage other EXPENSIVE parts!

 

[POC]

Pretty sure this is my answer.

Thanks everyone.

 

[sixdogs]

My Deere dealer has bulk binds of metric grade 10 and, based on the high price, are extra hardened bolts. The prior post looks correct and I can't see a reason to buy the bolt from a dealer for many multiples of the bulk bin price.

The real question is; how did they break? That would be a concern.

 

[MHarryE]

Are the bolts for a nut and bolt type connection or into tapped holes? If into tapped holes, you may need to pay attention to thread pitch. Japan switched from JIS to ISO sizes in 1967 but you can still find JIS around - and up to size M12 the thread pitch varies from ISO standard.

 

[POC]

Re: Bolt with "10" on the head

My Deere dealer has bulk binds of metric grade 10 and, based on the high price, are extra hardened bolts. The prior post looks correct and I can't see a reason to buy the bolt from a dealer for many multiples of the bulk bin price.

The real question is; how did they break? That would be a concern.

They are into tapped holes.
I guess some worked loose and the others couldn't handle the load.

ETa: quoted the wrong post...

 

[kco]

It would be interesting to know why they worked their way out. Was it just on one side or on both sides? Perhaps they never were installed correctly.

You might want to call a dealer to get the torque values, and then regularly check the torque on all the bolts for a while. The new ones should be re-torqued until they quit stretching any way. If you find they continue to loosen it might be a good idea to use blue lock-tite.

 

[POC]

It would be interesting to know why they worked their way out. Was it just on one side or on both sides? Perhaps they never were installed correctly.

You might want to call a dealer to get the torque values, and then regularly check the torque on all the bolts for a while. The new ones should be re-torqued until they quit stretching any way. If you find they continue to loosen it might be a good idea to use blue lock-tite.

I planned to loctite them anyway.

 

[sixdogs]

I planned to loctite them anyway.

Yup, Loctite nearly everything. I never used to but it just solves so many problems before they happen.

 

[Tractor Seabee]

It is probably a shortened version of the 10.9 metric designator. I agree, forget the dealers, probably pay 2 prices for one. Also ditto the thread pitch, it may be different than a standard off the shelf; but, you can be sure the tractor assembler is not using something that is uncommon in the bolt world. You should have a good supplier like Fastenal around. Take it with you and match up. Those places are very helpful and sell by the each. I have never bought bolts from and OEM assembled product. You can make some subtle improvements that way, such as head type, grade, and driver style. I always use grade 8 for items with dynamic loads no matter what the original was.

Ron

 

[CADplans]

I imagine CAT sells metric bolts,,,
I bought some bolts from CAT when I built my landplane.

To say the least, the bolts are impressive. The height if the head is much greater than a regular bolt.
The bolt on the left is CAT,, the bolt on the right is TSC.

The price of the CAT bolts were VERY close to TSC pricing.

Also,, you get the cool "CAT" logo on the head,,
it will impress buyers when you go to sell the tractor,, they will think they are buying a CAT!! :laughing:

There are no concerns about grade when you buy a CAT bolt.

 

[olPete]

Its just a high tensile metric bolt, all the ten is there for is so you don't put any 2 cent metric bolt in there that will thread in. You see 8s all over motorcycles, where they count. Same thing you know to replace with a decent one not one made of playdoh

 

[ovrszd]

I buy specialty bolts from my local JD dealer often. They aren't any higher than the local farm store. And as CADplans said, the quality is much superior.

 

[sixdogs]

CAT bolts are the king of bolts. If I'm ever in need of a bolt with unquestionable character, I get a CAT bolt.

EDIT--let me add that I buy most bolts at JD like ovrsd does. They seem to be much better quality than comparable farm store bolts for not much more money.

 

[ovrszd]

CAT bolts are the king of bolts. If I'm ever in need of a bolt with unquestionable character, I get a CAT bolt.

I agree.

 

[Clay45]

Take one out and go go auto parts store and see if they have a similar bolt by Volkswagen. The one's I got were identical to the one I brought in.

 

[Gary Fowler]

Fastenal will have any bolt (or can get it if not in stock) but I find my local Fastenal to be good quality but super high priced. They can measure and tell you the exact size and thread pitch needed though. I don't know that the bolts in most farm supply houses are high quality, most likely cheapest that they can find. I wouldn't use them for critical component fastening, get a quality bolt from a reputable manufacturer that can get you the mill certs (heat number from the ingot used, tensile tests on the as produced bolt, alloy components, etc) on the bolt if needed.

 

[sixdogs]

One of the more useful things I have is a complete metric tap and die set. Then, given any nut or bolt, I can determine the thread pitch, diameter, etc right on the spot. Then I can walk into a store knowing the bolt I want and not have to spend time jerking around and trying to measure threads and pitch.