mystery bolt

[blindstar]

My wife found this bolt in our driveway (1/2 mile gravel). I believe that it is a M16-2.0x65. I maintain the road with my L4330. This time of year, with a front mounted snowblower. Any thoughts on where this may have come from would be greatly appreciated.

 

[joeyd]

The picture didn't load

 

[SPYDERLK]

My wife found this bolt in our driveway (1/2 mile gravel). I believe that it is a M16-2.0x65. I maintain the road with my L4330. This time of year, with a front mounted snowblower. Any thoughts on where this may have come from would be greatly appreciated.

Coarse thread means probably nothing to do with your wheels. Likewise loader to cast chassis mount - I think KUB uses a finer thread? - - Any wear marks on the bolt shank or threads?

 

[blindstar]

Thanks for the comments. Here's the picture



the numbers are inches

 

[bigtiller]

When I find items like this in my driveway, my first thought/hope is "I bet it was in the rock when the dump truck left the quarry".

 

[ptsg]

I would check all the wheels and loader mounts to see if you're missing a bolt there.

 

[orezok]

When I find items like this in my driveway, my first thought/hope is "I bet it was in the rock when the dump truck left the quarry".

30 years ago I was building a condo project in a suburb of San Diego. We needed a hundred thousand yards of fill and hired a grading contractor to supply. The contractor was also doing a project for a high rise in downtown that had large excavation for underground parking. The sandy soil was loaded onto bottom dump truck, transported about 30 miles to my site, dumped in windrows and then spread with heavy equipment.

I was walking the site with my engineer when we found a antique glass light bulb laying on the surface totally intact. Do not ask me how that could possibly have happened! We found other antique items that were probably disposed from maybe a hundred years ago also.

 

[radios1]

30 years ago I was building a condo project in a suburb of San Diego. We needed a hundred thousand yards of fill and hired a grading contractor to supply. The contractor was also doing a project for a high rise in downtown that had large excavation for underground parking. The sandy soil was loaded onto bottom dump truck, transported about 30 miles to my site, dumped in windrows and then spread with heavy equipment.

I was walking the site with my engineer when we found a antique glass light bulb laying on the surface totally intact. Do not ask me how that could possibly have happened! We found other antique items that were probably disposed from maybe a hundred years ago also.

it's one like this, it could last at least 117 years, and it must be worth something!. Livermore's Centennial Light Bulb

 

[radios1]

Thanks for the comments. Here's the picture

View attachment 643643

the numbers are inches

the bush hog mid mount loader uses that!. maybe other places, too..

 

[SPYDERLK]

I would check all the wheels and loader mounts to see if you're missing a bolt there.

Yeah. OP said 2mm pitch. It looks finer than that - but at 16mm D that could be deceptive. Wheels/loader is a good call.

 

[blindstar]

OP said 2mm pitch

I attempted to measure the pitch but probably screwed it up. It is definitely metric and I don't have a metric thread gauge. It looks like NF but doesn't match my thread gauge.

 

[BukitCase]

If that grid is inches, it's either 1.5 or 1.6mm pitch (or 16 TPI) might even be a 5/8 fine (18 TPI) ... Steve

If you have a digital caliper, you can count several threads, put the "inside" points in the thread grooves, then divide by the # of threads (10 is a good choice usually) and that should give you the pitch. If the head markings convince you it's metric, hopefully your caliper has that option; simplifies the math a bit.

 

[the old grind]

I'd say 1.50 pitch, pretty close to 18 tpi, much closer to 17.

 

[oldtimer 66]

Lay your Brown and Sharp scale next to the bolt. Rough align the threads to some division on the scale. Get out your phone and take a picture. Look at the picture and zoom in and count the threads./ Wa La all done. My eyes down't work like when I was young so that is what I do when I need to check a thread pitch. I get the OD with a set of micrometers.

 

[/pine]

It does not look like it recently became un-threaded...it looks like it has been around a while without a nut or screwed into a boss etc...
...

 

[jmc]

IIRC, that is a metric size that is real close in diameter and pitch to an English size. (Or visa versa) I went through this with the bolts on my hinged L4330 roll bar.

Otherwise, that thread wear looks like what you see on loose lug bolts.

 

[the old grind]

What is the crud in the threads? Mud, corrosion from whatever plating and subsequent environment, Loc-Tite (TM), anti-seize?

Could it have been kicked into the driveway approach by a highway plow, then pushed up the d'way by a bottom edge of the blower without going through the chute and out into the yard?

That it came in with a load of material, if not from the OP's tractor/blower is just SO my pick for 'best answer'. :thumbsup:

 

[SPYDERLK]

I attempted to measure the pitch but probably screwed it up. It is definitely metric and I don't have a metric thread gauge. It looks like NF but doesn't match my thread gauge.

The finer for 16mm is 1.5... Your American 16TPI should be close -- 17TPI almost exact like tog posted.

 

[joeyd]

It looks galvanized or painted silver. I would carefully look over my equipment, the color helps narrow down the possible locations. I use a bolt that size on my ATV plow to hold the blade to the plow frame.

 

[jmc]

Thanks for the comments. Here's the picture

View attachment 643643

the numbers are inches

Note that at a casual glance, the overall bolt length appears to be about 3 3/4 inches on that bastardized graph under it, but that graph starts at 1 inch instead of the usual zero.