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Bolt mounting Question...
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Hi guys, this is kinda of a beginner question but when using bolts through a double shear situation, can you mount one side on the threads or do all the threads have to be on the outside and require the use of a washer?
Im mounting end bushings for my 4 link bars, I just dont like how there is so much thread sticking out as shown in the drawing( using a 5/8-18-4.5" grade 8 bolt) Can I buy shorter bolts or do I need them full length so as to not damge the threads for any reason? |
Re: Bolt mounting Question...
Obviously, having a bolt that is sized perfectly would be the best option. Check aircraft supply catalogs. Or a bolt specialty store. WagAero, as well as Fastenall and Grainger come to mind.
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Re: Bolt mounting Question...
Well, Im going off of standard sizes that I can buy from Fastenall. If I were to buy a 4" bolt, the threads would be seated in the hole.
Can somebody help me out? |
Re: Bolt mounting Question...
In a critical application, you want the bolt long enough so that the full diameter protrudes through the other side. You should have just enough so that a washer will take up the slack but not enough that the nut bottoms out before fully clamping.
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Re: Bolt mounting Question...
I agree with Turbo85GMC ... you would want the shear load on the "shoulder" of the fastener and not on the threads.
Here is an AWESOME pdf file that I have used for years on proper use of fasteners. http://gltrs.grc.nasa.gov/reports/1990/RP-1228.pdf |
Re: Bolt mounting Question...
The fellows are right, you want the shoulder carrying the weight not the threads. I understand you're having trouble getting the exact length through your sources, so I'd run the 4.5 inch bolt and cut it shorter before running a 4 inch and having weight bearing down on the threads.
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