I've got big nuts.

[NAYLOR]

Nuff said.

<a href="http://s419.photobucket.com/albums/pp275/courtnaylor/?action=view&current=bignuts.jpg" target="_blank"><img src="http://i419.photobucket.com/albums/pp275/courtnaylor/bignuts.jpg" border="0" alt="Photobucket"></a>

 

[Uncle Buck]

Man! Do You Ever! Damned fine door stop.

 

[johnwill]

Nice Photoshop job !

 

[NAYLOR]

let's try camera phone.

 

[Jbullfrog]

Do you know what they are off of?

 

[NAYLOR]

They are off of a pressure vessel that runs at 2500 psi. My dad picked them up for $1.50 from the refinery scrap yard.

I want to know what the torque specs are for these things.

 

[nissan_crawler]

gutentight

 

[Joe B.]

One is larger than the other.

 

[<>Severed<>]

One is larger than the other.

I think they make a pill to fix that.

 

[kartracer55]

I want to see the tools they use to tighten them...

 

[mkdive]

All I can think of is the wrench!

 

[bchee]

I want to see the tools they use to tighten them...

me too

What I thought was interesting at first was the fine pitch of the threads. I would expect a fastener that large to be on a coarse thread bolt. I'm not an engineer, that's just my observation.

Makes sense though since it's from a pressure vessel.

 

[autoace]

You could use those for trick anvils. They would also be good for knocking wheel bearings races out of rotors, and such. Looks like the center diameter is about right for clearance, when a rotor is placed on top.

 

[eschoendorff]

Nice Photoshop job !

That's what I thought too... at first. At second glance, these might be real. In any case, he has bigger nuts than I have... but I can take mine with me!

 

[RbrtAWhyt]

gutentight

Thats "virgin" in German...

 

[chammyman]

me too

What I thought was interesting at first was the fine pitch of the threads. I would expect a fastener that large to be on a coarse thread bolt. I'm not an engineer, that's just my observation.

Makes sense though since it's from a pressure vessel.

the finer the thread the far higher the clamping force is and less likely to back off.

 

[justinmc]

I've got a fairly large screw that I have laying on a shelf in my office. However its nowhere near the size of those suckers! Wonder what "size" they actually are. Mark out a couple of lines on the floor and measure em up!

 

[Jiffycake]

The floor is a standard 12x12 tile.

 

[Panzer]

Well if I remember right those nuts are similar in size as some hydraulic cylinders I have torn down but the most torque I put on those were in the 15,000ft lb range a little scary considering the machine we used was homemade.

 

[NAYLOR]

The bigger of the two is for a 4" diameter bolt with 7 threads per inch; you'll need a 6" wrench. The smaller will require a 4.25" wrench.

 

[speed bump]

As far as threads they are fine because they are going onto like material bolts.

As far as a wrench I have a 36" pipe wrench that I know will do the little one and I think even goes to 6" so no problems there.

If I wasn't putting off Thermo II and INC lab right now I could even give you an idea of what they should be torqued to.

 

[fourfeathers]

This thread makes me think of the awards they used to give out on Battlebots. They were a huge aluminum nut, and 1 was for sale on ebay a few weeks ago. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=330286175775&indexURL=0&photoDisplayType=2#ebayphotohosting