Bolt Thread ID???

[moship]

Does anyone know what size bolt and threads work in the tapped hole shown in the photo? Your looking at the support structure for a 723 FEL on a Grand L 30 Series tractor (L3130). The threads look to be fine pitch.

I bought what I could at Lowes and Tractor Supply but their metric bolt selection is a bit weak.

12mm x 1.25 acted like the diameter is too large or the thread pitch is wrong and I didn't want to force the issue.

10mm x 1.25 seems to small in diameter.

Thanks

 

[murphy1244]

Maybe its not Metric.

 

[ibnxe]

Metric fasteners in these sizes come in fine thread, intermediate thread and a coarse thread. The 12mm x 1.25 is the intermediate thread. 12mm x 1.5 is the coarse thread and 12mm x 1.0 is the fine thread. I would expect that if the intermediate didn't work, that the coarse thread is what you want. The thread pitch (second number) is a measurement between consecutive threads in milimeters. Are you able to see the thread in the hole?

 

[SPYDERLK]

Does anyone know what size bolt and threads work in the tapped hole shown in the photo? Your looking at the support structure for a 723 FEL on a Grand L 30 Series tractor (L3130). The threads look to be fine pitch.

I bought what I could at Lowes and Tractor Supply but their metric bolt selection is a bit weak.

12mm x 1.25 acted like the diameter is too large or the thread pitch is wrong and I didn't want to force the issue.

10mm x 1.25 seems to small in diameter.

ThanksView attachment 343167

Try a 7/16 x 20. Thats the American fine thread. Its slightly smaller than 12mm, but 1.25 and 20 TPI are virtually identical thread pitch. I think TSC has them in Gr8.
larry

 

[number two]

Aren't the loaders made in the USA and the tractors made in Asia?
The loader most likely has SAE(fine thread) or USS(coarse)thread fasteners whereas the tractor would have metric fasteners.
Good Luck,it won't be that hard!

 

[moship]

ibnxe: Thanks, but I was aware of the multiple thread types for metric, but buying the different sizes at Lowes or TSC is impossible. It's definitely a fine thread. I tried getting my thread gage (from tapping set) into the hole, but it is too large to fit within the hole. (Yes, there are threads in there)

Spiderlk: Tried that the 7/16-20 figuring that it might be SAE vs Metric but the bolt felt a bit loose in the hole. 1.25 metric pitch is almost identical to 20 pitch SAE. Thanks for the suggestion though.

number two: All the other bolts that assemble the subframe are metric, but I guess it could be threaded either way. It shouldn't be that hard, but it's not like I can find a place that sells all the different types of metric thread combinations.

I have SAE fine threads in a variety of sizes. A 7/16-20 goes in but feels loose. 1/2-20 won't go (diameter is too big).

I also tried searching the various parts drawing on Messick's but can't find anything that utilizes this hole to find the corresponding thread size.

I appreciate everyone's thoughts/suggestions.

Thanks

 

[kcender]

One thing you could try is to remove a bolt from somewhere else on the tractor and try it in the hole.There should be other same size bolt holes somewhere on the tractor.

 

[RickB]

One thing you could try is to remove a bolt from somewhere else on the tractor and try it in the hole.There should be other same size bolt holes somewhere on the tractor.

***WINNER***

Hint: It's going to be a metric thread if the bolt screws into a casting that's part of the tractor.

 

[Tx Jim]

Best that I can tell parts schematic does show a bolt for "that hole" but the other bolts on mounting frame are M16*1.50*55 or M16*1.50*45. What are you wanting to bolt using the hole with the arrow pointing at it?

 

[Baby Grand]

Go to a NAPA or other quality auto parts place that serves commercial mechanics & garages, or a good, old-school hardware store, the kind with a whole aisle of fasteners, not a big-box home improvement center. Take the bolt that you removed with you, as Kcender & RickB recommended. Should find a match without much issue. The bolt will cost twice as much at these places, so plan to be out $1.37 or so and some additional mileage in the car.

 

[moship]

Tx Jim: The M16 is way too large for this particular hole.

Kcender: Good idea, but I just couldn't find one yesterday that would work. Not to say there isn't one, just didn't find it.

Baby Grand: I'm not in favor of the big box stores and unfortunately they are the only ones open past noon on Saturday. The M12 I bought from Lowes was a whopping $4.17 for one. I thought if someone knew the thread size I could call around and save time driving around searching.

What am I trying to do? I thought about making some kind of splash shields/fenders. During snow season I'm getting tired of all the spray coming from the wheels as I travel between my neighbors to clear their driveways. Thought I'd take advantage of the taped hole to mount the bracket. Only plan on keeping them in place when the snow blower is on.

Regards

 

[Baby Grand]

I hear you about places being closed when you need them to be open!

 

[cycle_gator]

Moship:

I cannot tell exactly where you are located, but in my neck of the woods there is a smaller local hardware chain that carries a huge selection of metric bolts. I too am working on a project on my L4310 which I am sure is a little different than your Grand L, but so far, I have found that all of the holes tapped in the block and transmission are fine thread. Do you have the bolt? There is a website call Bolt Depot they have a bolt sizing chart that when printed out at 100% gives an accurate representation of the metric thread diameter and pitch. I had to use it to size the mount bolts for my ROPS which turned out to be a somewhat rare 14MM fine thread. You can also purchase bolts from them, but I would check around fo one of those real hardware stores locally first. Anyway, I found the site to be helpful. I also found that the unused tapped holes in the block and transmission needed some judicious cleaning to get the paint out of the threads. The was a long process and involved the use of a grooved bolt and lots of penetrating oil. Good luck.

 

[SSdoxie]

Could you just tap the hole in loader frame to say 1/2" thread and use a shorter bolt without going into the tractor frame?

 

[SPYDERLK]

ibnxe: Thanks, but I was aware of the multiple thread types for metric, but buying the different sizes at Lowes or TSC is impossible. It's definitely a fine thread. I tried getting my thread gage (from tapping set) into the hole, but it is too large to fit within the hole. (Yes, there are threads in there)

Spiderlk: Tried that the 7/16-20 figuring that it might be SAE vs Metric but the bolt felt a bit loose in the hole. 1.25 metric pitch is almost identical to 20 pitch SAE. Thanks for the suggestion though.

number two: All the other bolts that assemble the subframe are metric, but I guess it could be threaded either way. It shouldn't be that hard, but it's not like I can find a place that sells all the different types of metric thread combinations.

I have SAE fine threads in a variety of sizes. A 7/16-20 goes in but feels loose. 1/2-20 won't go (diameter is too big).

I also tried searching the various parts drawing on Messick's but can't find anything that utilizes this hole to find the corresponding thread size.

I appreciate everyone's thoughts/suggestions.

Thanks

Its a "dirty" 12 x 1.25 hole then. Chase it with a cheap tap from HF. That or thread in the 7/16 soaked in Kroil and tap/wiggle it a bunch with a hammer - then use moly on the 12mm. ... Is there one like it on the other side?

 

[Gary Fowler]

Did you manage to find another bolt from the tractor that will fit? Fastenal will have the bolt you need if you can find one and measure it. Also they sell a bolt and nut thread gauge for about $12 that has SAE and metric thread gauges which if very handy for determining thread on bolts and nuts but it is useless for determining inside dimensions like you have.

 

[whis]

Its metric, look a head of bolt, numbers mean metric

 

[SPYDERLK]

Its metric, look a head of bolt, numbers mean metric

It is probably metric because it doesnt match American. The bolts that are definitely metric are the ones threading into the tractor. The threads in question are in the loader frame.

 

[KubotaGlocker]

Moship, have you inquired at your local dealer? They should be able to look it up and sell you what you need.

 

[moship]

In the spirit of finalizing this thread...

I tried all three M12 thread types and none of them would engage past a thread or so. Upon close inspection it looks like the threads are poorly cut. (M12-1.50, M12-1.25 and M12-1.00).

In the end, another route was chosen for the fenders and these threaded holes were not needed, thus ending my quest to ID them. http://www.tractorbynet.com/forums/kubota-owning-operating/299065-home-made-front-fenders-l3130.html

Happy New Year!