Bolt Size Help

[LD1]

You can clearly see they are fine threads.

I think you need to get a M16x1.5 tap and clean them threads up

 

[LD1]

Rule of thumb: Cast iron and aluminum will always have coarse threads, whether SAE or metric.

Just plain WRONG

 

[Bob Rooks]

You can make your own thread chaser bolt by filing reliefs in the direction of the threads. Two or three will do.

 

[Bob Rooks]

Just plain WRONG

Hahahaha! There are exceptions to every rule, but how so? Can you show a non-extreme example of fine threads in cast iron (not cast steel)?

 

[LD1]

Hahahaha! There are exceptions to every rule, but how so? Can you show a non-extreme example of fine threads in cast iron (not cast steel)?

You said cast iron will ALWAYS have coarse threads. IF there are exceptions then thats not always. Perhaps you should have said USUALLY.

But lots of cast iron crankshafts have fine thread flywheel and balancer bolts.
These kubotas are another example. ALOT of the fasteners including the bellhousing bolts and loader bolts are fine thread.
Have seen lots of valve cover bolts in aluminum heads that are fine thread
Cast knuckes on cars usually have fine thread holes for things like the ABS sensor as well as alot of cast bearing hubs for autos are fine thread
I have seen oil pan bolts that are fine thread

Thats all I can come up with off the top of my head. Honestly dont pay too much attention when wrenching on stuff. Especially metric stuff cause I cannot look at a M10 bolt and automatically tell if its fine or coarse thread like I can with SAE fasteners.

But to say ALWAYS coarse thread is bologny

 

[Bob Rooks]

You said cast iron will ALWAYS have coarse threads. IF there are exceptions then thats not always. Perhaps you should have said USUALLY.
What part of "Rule of thumb" do you not understand?

But lots of cast iron crankshafts have fine thread flywheel and balancer bolts.
Forged nodular iron cranks fall under "Exceptions to the rule", steel cranks do not.

These kubotas are another example. ALOT of the fasteners including the bellhousing bolts and loader bolts are fine thread.
Depends on the metallurgy. Cast iron or cast steel?

Have seen lots of valve cover bolts in aluminum heads that are fine thread
I have not yet seen any aluminum heads on tractors or construction equipment, so this would fall under "exceptions".

Cast knuckes on cars usually have fine thread holes for things like the ABS sensor as well as alot of cast bearing hubs for autos are fine thread
What knuckles? Driveshaft U-joint yokes are cast steel. Yet to see a cast iron hub with fine threads - on anything!

I have seen oil pan bolts that are fine thread
Example please.

Thats all I can come up with off the top of my head. Honestly dont pay too much attention when wrenching on stuff. Especially metric stuff cause I cannot look at a M10 bolt and automatically tell if its fine or coarse thread like I can with SAE fasteners.

But to say ALWAYS coarse thread is bologny
What's "bologny"? Bologna? Baloney?

 

[ruffdog]

The 1st picture with the 5/8-18 bolt started sure gave us a good comparison of the threads. If a 16x1.5mm is just too big, it sure seems the likely thread would be that 5/8-18 thread which is slightly smaller than 16mm and has a slightly finer pitch than a 1.5mm would be.

 

[nwut05]

You can make your own thread chaser bolt by filing reliefs in the direction of the threads. Two or three will do.


View attachment 719885

this may be helpful just trying to find the right threads first thank you

 

[nwut05]

The 1st picture with the 5/8-18 bolt started sure gave us a good comparison of the threads. If a 16x1.5mm is just too big, it sure seems the likely thread would be that 5/8-18 thread which is slightly smaller than 16mm and has a slightly finer pitch than a 1.5mm would be.

this may be very helpful to. i will have to dig around and see if i can find one locally if not it will be googel's and a day or to.

 

[nwut05]

Hahahaha! There are exceptions to every rule, but how so? Can you show a non-extreme example of fine threads in cast iron (not cast steel)?

Not exactly the thread i started but could be a discussion here... while we on the subject do you think or know if the loader mounts are cast iron or cast steel and how do you tell the difference...ping it? like a cheap anvil..????

 

[nwut05]

Hey i need to also revisit my earlier post and say, 16mm will almost go in the hole but the threads don't seem to start at all and after looking either/both fine and course threads, of the 5/8 bolts i tried seem to be getting messed up where they are trying to start.....i tried again after i posted earlier and had a few min to think bout 5/8 and 16 mm. ....There is an answer to this and i will eventually find it no matter how archaic we get with trying, sometimes a bigger hammer just won't work, but i wish it did on this lol.

 

[jigs_n_fixtures]

Sorry, nothing against Lowe's or Home Depot etc. but they do not qualify as a "good hardware store".

Yest they do have nuts & bolts but if he is looking for someone competent who can help him.....

Oh well, never mind.

I use the names: Home Desperate, and Lowers. You go to Home Desperate because you are desperately hoping they might have what you need, and Lowers with even less expectation that they might.

The the local Ace Hardware, has a few of a few thousand things. And, if they know you they will let you go peruse the warehouse and basements full of things that have been in stock since Great Grandpa opened the store in 1922, and nobody there today has any clue as to what they are. Twelve years ago I needed some ball ends for the ridge caps of historic buildings built in 1933. I couldn’t find new ones anywhere. Took one of the old ones to the store and ask Grandpa if he knew where I might get six of them. He looked of and away for a moment, and said, “I think I might have some, unless somebody sold them. lets go look.” This is when I learned about the basements. We went down stairs, and there was a hole in the basement wall, which connected to the basement of the store next door, and one into the next basement, and into the next one, and the next one, and a couple more. Fifth Basement, he walked to a shel and pulled down a box with about twenty of them. There are six stores on that side of the street in that block. They own all of them, and have connected all the basements. I immediately figured out, the fact they don’t have something on a shelf doesn't mean they don’t have it in stock. They have about five times as much in the basements as the store, and a warehouse out back that they keep the big stuff that doesn’t fit down the stairs into.

Home Desperate, and Lowers, have thousands of a thousand things. But none of the more esoteric things you need to work on anything the least bit esoteric.

 

[LD1]

Rule of thumb: Cast iron and aluminum will ALWAYS have coarse threads, whether SAE or metric.

That makes the statement an oxymoron. Trust me, I know what "rule of thumb" means

 

[LD1]

Hey i need to also revisit my earlier post and say, 16mm will almost go in the hole but the threads don't seem to start at all and after looking either/both fine and course threads, of the 5/8 bolts i tried seem to be getting messed up where they are trying to start.....i tried again after i posted earlier and had a few min to think bout 5/8 and 16 mm. ....There is an answer to this and i will eventually find it no matter how archaic we get with trying, sometimes a bigger hammer just won't work, but i wish it did on this lol.

That's progress.

I have yet to see a SAE hole in a Kubota casting anywhere.

Corrosion, paint, buggered from trying other bolts, etc. It is certainly 16mm based on the way the 5/8" bolts act

 

[Bob Rooks]

I have yet to see a SAE hole in a Kubota casting anywhere.

This is a genuine SAE Kubota bolt. Don't know where it fits though.

Kubota 75599-04535 Hex Bolt NOS | eBay

Find many great new & used options and get the best deals for Kubota 75599-04535 Hex Bolt NOS at the best online prices at eBay! Free shipping for many products!

www.ebay.com

 

[LD1]

This is a genuine SAE Kubota bolt. Don't know where it fits though.

Kubota 75599-04535 Hex Bolt NOS | eBay

Find many great new & used options and get the best deals for Kubota 75599-04535 Hex Bolt NOS at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Certainly not a casting since it's fine thread

 

[LD1]

This is a genuine SAE Kubota bolt. Don't know where it fits though.

Kubota 75599-04535 Hex Bolt NOS | eBay

Find many great new & used options and get the best deals for Kubota 75599-04535 Hex Bolt NOS at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Looks like it fits various loaders and backhoes.

Which makes sense since those are built in the states.

Also why I said I have never seen a standard bolt on a Kubota "casting". Because those are made in a metric country

 

[nwut05]

That's progress.

I have yet to see a SAE hole in a Kubota casting anywhere.

Corrosion, paint, buggered from trying other bolts, etc. It is certainly 16mm based on the way the 5/8" bolts act

I most likely have to agree with you on this point, mm that is, it just dosent seem right that the 16mm is so disagreeable. however i think we will know for sure in the coming week as i hope to have more time to get it cleaned inspected and a fresh bolt or 2. I am not even beyond going to a local dealer (even though by phone they already said they had no idea) an in person short explination and show me session with one of the parts guys or mechanics may be in my future....if they are willing to do that, and if they have a m6060 or 7060 in stock, that may be another issue all together the way things are right now.

 

[Bob Rooks]

I wasn't saying the bolt hole in question was SAE or metric, so it could be M16 x 1.5 property class 5.8 or greater, which is stamped on the head of a non-propriety fastener.

 

[BravoXray]

Boy, this has turned into a pissin' match.

Has the OP tried sticking a thread pitch gauge in the hole to check the pitch?
That would seem to be the obvious first step to me.