(Part 2) Best nut & bolt assortment sets according to redditors

I can think of four possibilities.

1. Your teacher is bad at science and actually believes that, all else being 100% equal, the cotton truck would win. In which case I would love to hear his rationale.
   
2. Your teacher knowingly gave your class a wrong answer in order to stimulate conversation and get the class thinking about the question. I had a science teacher who would do this and this feels very much like something Mr. Schmidt would do.
   
3. Your teacher may be trying to teach the class the lesson that it's bad to work backwards from an assumed fact by presenting you with something false and having the class force its way backward from that answer, demonstrating a non-scientific principal.
   
4. Your teacher is presenting a thought exercise in hopes that someone in the class will challenge him with a scientific argument that disproves his statement.
   
   As a thought exercise, assuming all other variables are equal as stated, I would propose that the teacher is wrong and the nail truck would win. According to the National Cotton Council of America one bale of cotton weighs about 225 kg at about 22 cubic feet. To get 1000 kg we'd need 4.4 bales which would be about 97 cubic feet. In contrast, Amazon says that 50 lbs of flooring nails comes in a box that's 9.5"x9.5"x6.5". 1000 kg is about 2200 lbs so we'd need 44 boxes. One box = .34 cubic feet, so 44 boxes = 15 cubic feet. That being said, if you had an open-bed truck and you put 97 cubic feet of cotton in it, you would have substantially more air drag than the same truck with 15 cubic feet of nails in it, and that air drag would be enough to make the cotton truck come in second place.
   
   Of course, if both trucks are enclosed box-type trucks, none of that would matter.

This thing has saved me so much time and headache. Especially if you are working on something you are not familiar with or can't get a visual on the bolt. They are china quality and get lost easily. So if you go this route grab a few.

They're called barrel nuts and come in a variety of dimensions. You'll need to make sure you buy some that match the size you need.

I've built some portable walls for gallery displays, that sort of thing.

If it isn't going to be seen from all angles, that will make it quite a bit easier. If it is, that just means you need to sheath both sides of things and plan access to your hardware.

A simply way to go about this is to look into some knockdown bed hardware (http://www.amazon.com/FURNITURE-BOLT-ALLEN-HEAD-BARREL/dp/B006ZLKVU2/) and in the framing for your walls, build in 2-4 structural points for these bolts.

When you get on site, you line up your sections and lock them in quickly using an electric driver.

As far as making it stable, if you've got a shape like the image you've shown, then by connecting the walls to the back and then running one bolt from each wall into the counter, I think you'd be all set.

The item above is close, but not quite the same functionality.

This, however, has all of the same bolt and nut sizes for ~$80. (I just ordered a set for my garage...)

http://www.amazon.com/METRIC-Gauges-Check-Thread-Fastener/dp/B0098JILSW/ref=pd_sim_hi_25?ie=UTF8&refRID=0XQGP0J054658YX42TV9

This one has an identical head. I found that by googling for Ikea screw. Is the piece from Ikea? The stores I've been to (in the UK) have a spares department where they carry all the different fasteners they use. If there's one near you I'd take your sample there and see if they can match it.

Edit: Or there's these on eBay.

Furniture bolt/screw seems to be the thing to search.

Then I'll back up Ottawa fastener...they've been great in the past.

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Or, if you can wait: https://www.amazon.ca/Hilitchi-180-Piece-Stainless-Socket-Assortment/dp/B01MU4O1FJ/ref=sr_1_17?keywords=vesa+screws+m4&qid=1574384568&sr=8-17

get a battery nut, they are rectangular instead of hex so they can slide under the terminal and then you just tighten like normal

When I designed my kids' crib I used mortise and tenon joints to attach the front/back assemblies to the side assemblies. I then used bolts through the leg posts, into the rails, and into barrel nuts. These are the type I'm talking about: https://www.amazon.com/Pack-Furniture-Allen-Barrel-100Mm/dp/B00CG5BUH4/ref=pd_day0_60_2?

In terms of making the height adjustable, keep it simple and just drill 4-5 holes in each leg. Put a threaded insert in each one. Then you can just bolt in the bedsprings into which ever height you want as the kid grows.

Not familiar with the bed set, but took a quick look at the video you linked. Maybe something like:




uxcell Knock Down Furniture Cam Lock Fitting Dowel Assembly 11 Sets https://www.amazon.com/dp/B019ESUZIA/ref=cm_sw_r_cp_apa_i_aCpSDb7KJCSSM

You could also fix it with something like this:

https://www.amazon.com/uxcell-M5x10mm-Socket-Thread-Insert/dp/B01AXY9AQW/ref=sr_1_fkmr3_2?keywords=barbed+body+hex+insert+nuts&qid=1570715164&sr=8-2-fkmr3

These take a metric screw, but you can find english threaded versions as well. I prefer this type that "screws" in with an allen wrench vs the type with little barbs that you press/pound in. In either case you will most likely need to make the existing hole bigger to accommodate the insert. How much bigger depends on the size of insert that you get.

Look into "end fasteners". They go under a couple different names but are great for making strong, square connections between extrusions.

Like this: https://www.amazon.com/Standard-Fastener-Aluminum-Extrusion-Profile/dp/B01HHNSMES

Just ran into that same issue. Those screws work if you're going through the case into the fan (like on the exhaust) but obviously don't really cut it going the other way. My case came with some longer screws kinda like this that I used. You could probably also use the rubber thingies like this

edit: I'm assuming you are trying to go through the front of the fan to mount it to the case on the other side of the fan, yes?