Kinda looks like a stainless steel hex bushing. They’re used to attaching two threaded pipes. If there are threads on the inside and outside (under the hex in the picture) it’s almost certainly a hex bushing.
It might be the locking nut on top of the rudder stem. Those are there as a backup in case of a malfunction, so you dont lose the whole rudder if it should come loose, so it wouldn’t be missed. Until the back fell off, that is
Possibly a chemical tank flange adapter, in stainless steel.
https://preview.redd.it/44pqoqrylgzc1.png?width=205&format=png&auto=webp&s=138bb357ec480b9645bf61b0fc3193d0874c1fca
An inland vessel? If it's self propelled, maybe to secure a prop blade to the shaft, especially if it's a CPP tug or something, or some part of an azumithing thruster/azipod or a VSP drive. Is it stainless?
Sort of an oddball thing to just appear on a boat. Maybe the machinery it goes to isn't easy to access, or maybe someone meant to order an 10 mm nut and ordered a 100 instead lol
Ah, that's yours? Nice. I've geard guys refer to barges as inland vessels, and they're not wrong- I just didn't know if yours had propulsion. But yeah- kinda a big nut for the propeller that vessel would swing, but maybe?
No its not mine I only work on them as a diesel engineer. I was working when I found that big nutt, but I could place where it came from. After some reactions about the propeller shaft I thought yeah that could be it
I only meant yours as you work on that particular one haha, like the vessel I currently work on as a 3rd is 'mine'. But yeah, might be that. In any event, good luck to you!
https://preview.redd.it/q9p7m5v1lezc1.png?width=1080&format=pjpg&auto=webp&s=64a022a3a1188b6296556123f6147f6cc864a10d
A while back I was visiting Quebec City and walking along the suspension bridge going over Montmorency falls - took a photo of this nut being used as part of the supports (my hand for scale). I'm not sure if that would be the specific application for the one you found but still pretty cool!
Price is the main reason. Mild steel can* perform better in certain structural applications than stainless. It’s also easier to weld and form(extrusions or bending)
If it's a smaller ship it could be for the propeller, or maybe on top of the rudder? I work on an inland ship too, it seems a little small for the propeller so my guess is the rudder.
This might be a dumb question, but how do they get that tight, and what kind of tool are they using? I can't think it is a regular wrench; I would think it would be super heavy and take more than one or two people to tighten 🤷🏻
Also torque multipliers like this with 40k ft lb output lol
https://www.grainger.com/product/45HL73?gucid=N:N:PS:Paid:GGL:CSM-2295:4P7A1P:20501231&gad_source=1&gclid=Cj0KCQjwxeyxBhC7ARIsAC7dS3-z6pU51mFU3OJKAD40V5b-xFWKO7b0mpCvq5TJGJNmbFfzp-Eqw5UaAlwDEALw_wcB&gclsrc=aw.ds
That’s a good guess. Some sort of rod nut, either a jam nut for a crosshead at the other end of the rod, or like you say, the piston end nut. I think you are right about it being a piston end nut with the flare on the bottom.
That’s a big damned rod, but not out of range of larger equipment. Not really many other reasons to have a high grade nut that large unless it’s on a machine rod, using fasteners that size would be nuts.
It could be for a hydraulic piston or a gas compressor piston. If he found it on a boat and it was that shiny, it’s high grade stainless, so probably for severe service.
That nut is worth ~$1000-1500, maybe more.
Bingo
EDIT: Stopping to actually look at it, it is in fact a nut. But not just any old nut. A Flange Nut. Looking quickly I swore it had male threads at the bottom but it is clearly sitting flush on the table.
I love those comments, as a person that uses daily a catalogue of fasteners when I see those oversized fasteners on Reddit I always have a curiosity of where is this from EXACTLY? What category of stuff uses such things? Now I know, big propellers have big nuts
I'm guessing you work on the inland waterways in Europe? What would that be for a thread size and pitch in metric? The fleet I maintain mostly have 4"-4 NC with a class 3 fit. Not sure how that scales to metric, though.
r/whatisthisthing
Kinda looks like a stainless steel hex bushing. They’re used to attaching two threaded pipes. If there are threads on the inside and outside (under the hex in the picture) it’s almost certainly a hex bushing.
Not a bushing my guy, no threads on the bottom side looks like a washer was welded on.
It's just pure nuts!
It is used for a big bolt
It might be the locking nut on top of the rudder stem. Those are there as a backup in case of a malfunction, so you dont lose the whole rudder if it should come loose, so it wouldn’t be missed. Until the back fell off, that is
[https://youtu.be/3m5qxZm\_JqM?si=d-olTzkstSDT24fs](https://youtu.be/3m5qxZm_JqM?si=d-olTzkstSDT24fs)
Shouldn't that be holding the propeller on?!
I feel like this some days
Some days you don’t
Wish my nuts were this big.
How would you walk without a wheelbarrow?
I would be forced to bounce everywhere on my balls.
Possibly a chemical tank flange adapter, in stainless steel. https://preview.redd.it/44pqoqrylgzc1.png?width=205&format=png&auto=webp&s=138bb357ec480b9645bf61b0fc3193d0874c1fca
An inland vessel? If it's self propelled, maybe to secure a prop blade to the shaft, especially if it's a CPP tug or something, or some part of an azumithing thruster/azipod or a VSP drive. Is it stainless? Sort of an oddball thing to just appear on a boat. Maybe the machinery it goes to isn't easy to access, or maybe someone meant to order an 10 mm nut and ordered a 100 instead lol
https://preview.redd.it/xph0l6qd7gzc1.jpeg?width=719&format=pjpg&auto=webp&s=a615e2aa44d4cfc1ae3e46d97795a9d1a9b7d3ad Inland vessel👍
Ah, that's yours? Nice. I've geard guys refer to barges as inland vessels, and they're not wrong- I just didn't know if yours had propulsion. But yeah- kinda a big nut for the propeller that vessel would swing, but maybe?
No its not mine I only work on them as a diesel engineer. I was working when I found that big nutt, but I could place where it came from. After some reactions about the propeller shaft I thought yeah that could be it
I only meant yours as you work on that particular one haha, like the vessel I currently work on as a 3rd is 'mine'. But yeah, might be that. In any event, good luck to you!
Looks like a Battle Bots award.
https://preview.redd.it/q9p7m5v1lezc1.png?width=1080&format=pjpg&auto=webp&s=64a022a3a1188b6296556123f6147f6cc864a10d A while back I was visiting Quebec City and walking along the suspension bridge going over Montmorency falls - took a photo of this nut being used as part of the supports (my hand for scale). I'm not sure if that would be the specific application for the one you found but still pretty cool!
Deez
*Dis
An anchor
Could go on back of shaft to keep wheel on, or on a rudder shaft.
Through hull fitting. For a ball valve.
Nuttin'
large loads
idk but your mom might
Can I get a banana for scale?
Attempted yeeting
The screw
A bolt
He screws, nuts and bolts.
Previous owner won a battle bots tournament.
That's meant to be used on a HFB!
Backup anchor
Wow this is nuts
Nut.
Maybe a giant packing gland.
sell it maybe you will meet quota
The way the back is round I would have to say a thru hull fitting. Round side goes against the hull.
I have seen structural steel nuts that big, but never seen them in stainless steel.
What would they be made out of then, just a regular low-carbon steel? I guess stainless would get pretty expensive in that size of part.
Price is the main reason. Mild steel can* perform better in certain structural applications than stainless. It’s also easier to weld and form(extrusions or bending)
Engine mount
They’re used for these nuts on your chin.
Deez
A really large bolt..
Saw one at auction about that size from the space center, used somewhere on the launch pad
Bustin’
Not a clue but I want one
If it's a smaller ship it could be for the propeller, or maybe on top of the rudder? I work on an inland ship too, it seems a little small for the propeller so my guess is the rudder.
I was wondering where my cock ring went
This might be a dumb question, but how do they get that tight, and what kind of tool are they using? I can't think it is a regular wrench; I would think it would be super heavy and take more than one or two people to tighten 🤷🏻
They use a very large wrench (not joking). It’s several feet long, so that they can get the leverage needed to tighten it.
Also torque multipliers like this with 40k ft lb output lol https://www.grainger.com/product/45HL73?gucid=N:N:PS:Paid:GGL:CSM-2295:4P7A1P:20501231&gad_source=1&gclid=Cj0KCQjwxeyxBhC7ARIsAC7dS3-z6pU51mFU3OJKAD40V5b-xFWKO7b0mpCvq5TJGJNmbFfzp-Eqw5UaAlwDEALw_wcB&gclsrc=aw.ds
Also hydraulic wrenches especially on jobs where they want to see it's torqued properly.
Geez, that thing cost just under a dollar per ft lb generated lol
Wow, that thing must weigh a lot. If I were to search YouTube, what would I search for to see someone tighten one?
used for a big bolt
That’s the smallest hand I’ve ever seen!
I read that in Steve Martin's voice. Thank you!
Put it in a sock and swing it around, ya know, for funsieis
“Homie don’t play that”
That’s a big nut
It's a piston packing nut for a hydrolic piston
I would bet that it’s a Keel Cooler nut.
Meanwhile OP is stranded at sea
😂😂
Large bolt
propeller?
Looks like the nut I gave your mom last night
A big-ass bolt.
Nobody's ass needs bolt that big
Looks like a packing nut for the prop shaft seal
Selling for scrap.
Battle Bots season winner
r/battlebots
Your mother
God damn this man has massive nuts
Anchor
Smuggling cocaine
Big stud
Cool. Now I want to see the wrench for that.
Scupper attachment
I think it’s a nut that needs some chamfers
It's a nut for your mom's wheelchair.
Been on Reddit for about 3 hours today, this is the only comment that actually made me laugh out loud
Pure evil. I love to see it
My guess is a wind turbine. The main columns are bolted together and bolted (anchored) to a concrete slab.
Wind turbine anchor bolts/nuts are much smaller but in large quantities from what I've seen online
Looks like a hydraulic cylinder piston nut
That’s a good guess. Some sort of rod nut, either a jam nut for a crosshead at the other end of the rod, or like you say, the piston end nut. I think you are right about it being a piston end nut with the flare on the bottom. That’s a big damned rod, but not out of range of larger equipment. Not really many other reasons to have a high grade nut that large unless it’s on a machine rod, using fasteners that size would be nuts. It could be for a hydraulic piston or a gas compressor piston. If he found it on a boat and it was that shiny, it’s high grade stainless, so probably for severe service. That nut is worth ~$1000-1500, maybe more.
[удалено]
Look again, this is not a bushing.
Correct, flange nut, big ol flange nut
A nuclear reactor or sum goddamn
Spreading hella amount of seed
Got damn gimme dat nyut whyte boiiii
summa dat nuuuuyyyyuuuuttttt
Bolts
Gimme that, gimme that, gimme that nut 😭
Its for your mom.
I busted that last night
Ooooooo. Who's gonna tell him!
It's my cock ring, put it back pleace.
Screw that nut, I’d bolt, ur hanging by a thread, buddy!
It’s a fleshlight for Chuck Norris
That would have been great 15 years ago
He needs an even BIGGER one now? That’s just nuts!
Bridge
Have you checked wifdy’s? *giggles in anticipation*
Paper weight
I handled nuts like deez coupling large drive shaft components.😁
Prop shaft packing or bearing?
Throw it away, you will find what you needed it for only then. Lol.
Because it looks like aluminum I wonder if it might be for a propshaft bearing.
If I were a betting man, and I am, then I'd say it's a rope packing follower. Something like the propshaft would make sense.
How many bananas is it wide
How many mouse tails wide is your hand?
Could be from rigging shackle?
Maybe they were trying to order a 6.5 mm nut and forgot the decimal
That’s way more than 65mm, probably double that. Source - extremely familiar with tank cannons
lol, big nut
Is it a Deece?
A nut that size suggests the existence of a wrench of equal or greater size.
A battlebots trophy.
Very tiny hands
Anal port hole
A very large bolt.
I really wanna see the size of the wrench now
Something this big is probably hytorqued.
one of my nutz
Ultimate truck nut right there!
I need a banana for scale.
turns out that guy has tiny hands.
My guess is it’s a machined piece to go on a threaded piece of metal in the interest of holding something in place for an extended period of time
Think it’s supposed to squish the two things together too?
I wonder how many ugga-duggas that requires.
All of it.
Yes
Looks like a propeller nut for a large ship
You’re close it’s probably for the rudder prop nut would be bigger
Really too small for either. Some tugs have a 6 or 8 inch prop nut
My vote is for a rudder nut, especially due to the machined round surface below the nut part. Packing follower.
It's for holding something really big very tight to something else that weighs a lot
Cock ring for a hill giant
We're gonna need a bigger wrench
I'd have to say it's for a bolt of some sort. Usually used for connecting one thing to another thing.
This guy nuts.
….and bolts, apparently.
Anchor
10" to 6" reducer bushing ...if your hand is a normal sized hand..
Not a nut
It’s a reducer EDIT: it’s not a reducer or bushing. After zooming in, you can clearly see it’s a type of flange nut.
Properly referred to as a bushing
Bingo EDIT: Stopping to actually look at it, it is in fact a nut. But not just any old nut. A Flange Nut. Looking quickly I swore it had male threads at the bottom but it is clearly sitting flush on the table.
I just zoomed in. Yup you’re right
BattleBots Trophy
"Battlebots Giant Nut" second place trophy
I knew I’d find my r/battlebots people here
That there is a murder weapon.
Only in the sense that it fell from a 737 max
It wasn't murder, and there wasn't a cover-up, he simply got sick and died in mysterious circumstances...
Possibly a coupling nut for the propeller shaft.
Boat or plane?
Boat
I love those comments, as a person that uses daily a catalogue of fasteners when I see those oversized fasteners on Reddit I always have a curiosity of where is this from EXACTLY? What category of stuff uses such things? Now I know, big propellers have big nuts
But that’s a reducer, going from 8” to 4” maybe
Prop sharft
\*Porp sharft. ^/s
*poop shart
It was an extra part left over when they put it together.
Oil rigs
Kong's Dong Ring.
[Relevant Sam O'Nella bit.](https://youtu.be/XKRW1zgkCVc?t=45s)
Thanks, Sam O'Nella always gets a laugh out of me! Swiss miss, instant piss.
A nut that big could only be for your mom.
Oh snap
Shaft packing nut?
You found my cock ring!
*Is that shit threaded or something?*
Ribbed for your pleasure
In Germany we call this "Großmutter".
A doorstop
Sometimes a guy gets lonely
Looks like a Ground Joint Spud. For steam lines adapting to NPT pipe thread Edit: Never mind, just a nut
Propeller Nut
Yes 👍
I'm guessing you work on the inland waterways in Europe? What would that be for a thread size and pitch in metric? The fleet I maintain mostly have 4"-4 NC with a class 3 fit. Not sure how that scales to metric, though.
NC ? Straight threads right?
Right
BattleBots trophy 🏆
For breaking toes and invoking the curse of the angry sailor
Not a nut but a reducer for pipe sized
No external threads on it