How Strong Are Bolt Threads? Hydraulic Press Test!

How strong are hex nuts and bolts? and can we crush this giant ones? We are going to use our 150 ton hydraulic press and 240 force sensor to find out!

Do not try this at home!! or at any where else!!

Music Thor's Hammer-Ethan Meixell

[windriver]

Would be cool to see some more variables tests.

- Fine vs coarse threads.
- Difference thread forms (acme, 60° V, square)
- Different amounts of thread engagement

[misterhat]

"Hard bolt. Soft nut." Words to live by.

[CowsGoMow]

Thanks for taking the time to saw that big bolt and nut in half! Very interesting.

[justskip]

I had been waiting years for this. Did not disappoint at all. Now I want to see you invent something to do with the massive one.

[Dorfjunge]

I'm super impressed how accurate you guessed the pressure each time! especially the last

[Alex-xhzm]

6:40 "The effect is the same, no matter the size" Words to live by.

[Gyppor]

Very interesting how the M26 and M42 bolts start to get crushed and deforms before the threads let go!

[Mark.D.H.]

Great test! I would have been interested to see what difference a finer thread would make.

[SuperWorldRailFanProductions]

Your videos as well as your accent never disappoint and just make my day!! Keep it up!!

[scottinWV]

This is one the the top ten channels on YT! I've learned so much about the physical limits of materials by watching these videos.

[hannahighmark]

This is some of the best content on this channel for a while. I love these kinds of stress tests. Great video, thanks!

[trex]

Now I know I'm safe when crossing a bridge with bolts the size of a city bus

[thegiantgaming]

Try "Fine metric" bolts for comparison!
They have more threads and are harder than a "regular 8.8" bolt/nut curious to see how much more weight they can take.

[Adlamo]

Great video. Find a way to do the same thing in tension (instead of compression). I have heard that the bolt will break before the threads. Since you did in compression, the bolt compressed and got thicker but won't break.

[EllipticGeometry]

The timing of this video is impeccable. I just broke an M8 yesterday. Seems to be a fatigue failure under tension. The bolt fractured at the top of the nut. The nut seems to be in perfect condition. The bolt’s thread also looks great except for the very ends where it fractured. It’s clear the bolt was simply ripped apart before much else could happen. Extrapolating from this video, the M8 would probably take 3 tons or so under those conditions.

[nomore]

Thank you for posting this. As someone who knows very little about various fasteners, I have always wondered how strong nuts and bolts are, especially considering how often they are used in critical structures and safety equipment. This video was certainly eye-opening.

[Nanan]

Would love to see this done on a 1"-8UNC bolting setup made out of SA193-B7 / SA194-2H as this size bolting is used everywhere in power gen, steel, chemical plants and oil refining.

[ihrkanntmichma]

Interesting! Also pretty good guesses on the breaking force. As others, I'd like to see a coarse vs. fine thread comparison!

[meaculpamishegas]

You outdid yourselves, that boom and the thread blow out was epic, and the cut away is especially neat to see

[jdgower]

Typically, most bolts are roll formed threads, while nuts (and other internal threads) are cut.
Roll formed threads are usually much tougher than similar cut threads per unit volume, but with a bigger diameter on the nut threads and a smaller diameter of the bolt threads, this tends to equal things out a bit.
Really good demonstration! I would like to see testing between course and fine threads of the same size and grade fasteners, and also the differences in each of comparable size, thread, and grade fasteners in metric and standard.