How to Build A Treehouse | 18 Wranglerstar 

Shear strength of a bolt is directly related to the tensile strength. For us in the aircraft business, you can use a factor of 60% to go from tensile strength to shear strength. A 160ksi ultimate tensile strength is approximately 95ksi ultimate shear strength.

In response to the last thing you said, that whole "a grade 5 might be better because it'll bend but a grade 8 will just break because it's so hard" that everybody says is incorrect. A grade 5 bolt will bend AND break before a grade 8 bolt. Just a pet peeve, don't mind me.

Kirby Weldon I was trying to talk about the resilience of the bolt. Under static load, yes: it's all about higher tensile strength. But under variable loads the resilience of the metal becomes extremely important. You wouldn't put there a tungsten drill bit even if it has triple the tensile strength, because it's not resilient! If you drop it it breaks and shatters! There are strong materials with low resilience (tungsten/wolfram), weak materials with low resilience (glass), weak materials with high resilience (rubber), or strong materials with high resilience (titanium). On a smaller scale same goes for steel bolts. Lower tensile strength generally means higher resilience, and those super-hard bolts are on the brittle side and could shatter if mishandled or exposed to bumps and shocks (they are not glass, but still fragile) Resilience in general is the property to absorb energy in elastic deformation. Some can't store much energy in elastic form so they "store" it in plastic form, but plastic deformations are not posible so there is cracking-fracturing from a well placed jolt of higher energy than the one supported. Also a bent bolt is an indication of overstress, while a fractured bolt is a failure.

AsiAzzy Typically harder grades of bolts are case hardened and not thru-hardened so a grade 8 bolt that is case hardened is nearly as ductile as a grade 5 or a grade 2 bolt but the added outer hardness makes higher grades less prone to fail under sheer and tensile forces. You can test this by taking an equal sized bolt of each grade and bending them back and forth in a vise to destruction.

Thank you very much for your comment i was like 😳 since when the 8.8 metric bolt is grade 2 ? Again thank you don't get me wtong anybody can make mistakes and by the way i really like the knife

Luke Nicholls You are welcome Luke, Thank you for watching,

+Jerry O'Dell thanks Jerry

Try reusing them like that guy wanted to. Can you imagine how quickly they would have snapped? G.R.K. is the way to go. They have the best structurally rated fasteners.

***** Not even a please? Just a demand in bold? Did your mother forget to teach you manners?

Kimball Cody Thank you Kimball,

wranglerstar like they say at Chick-fil-a "it is my pleasure".

I'm not able to see the Support youtubers button. I wonder if its limited only to American viewers right now? I'd certainly throw 10 bucks your way.

It randomly poped up while I was watching a few of his older videos. Maybe Cody could provide a link for it on his page.

and grade 8 bolts like to sheer easier because they are harder and dont flex.

BigDaBAMF69 Yes, 8,8 metric is standard that is used in vehicles and stuff, not in suspension/powertrain tho. however harder is not better always, it does not flex and can break.

And more specifically the 8.8 mark means that the bolt has a tensile strength of 800 Nm/mm^2, and that the yield strength is 80% of that 800 Nm/mm^2 = 640 Nm/mm^2. I hope i used the right terms since english isn't my first language!