mystery bolt
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BukitCase
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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.
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
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I'd say 1.50 pitch, pretty close to 18 tpi, much closer to 17.
oldtimer 66
Platinum Member
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
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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...
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jmc
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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.
Otherwise, that thread wear looks like what you see on loose lug bolts.
the old grind
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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:
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:
joeyd
Platinum Member
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
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- Ford 1920 4x4 (traded in on Kubota). Case 480F TLB w/4 in 1 bucket, 4x4. Gehl CTL60 tracked loader, Kubota L4330 GST
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.
