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Old 06-18-2011, 10:24 AM
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Default Bolt science

This site has quite a bit of good information about bolting.

http://www.boltscience.com/index.htm
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Old 06-18-2011, 11:16 AM
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Pop's,

Thanks for answering my bolt question at the other site. I did not post it here because I had a temp problem logging on. Thanks also for the above Bolt Info. It appears to have about anything a person would need to know.
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Old 06-18-2011, 11:28 AM
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Pat, I'd hazard a guess that the most common plow bolt would be a Grade 5. That might put you into a stel with .3 to .5% Carbon. Welding on it would affect temper and you could get a brittle zone.
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Old 06-18-2011, 03:49 PM
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USMCPOP,

I have some projects coming up that will have me punching some square holes for the bolts. This time around I will be just tack welding the bolt heads so they do not fall out into an area where they could be hard to retrieve, or cause some damage. One time I asked at Fastenal if they had any grade 8 carriage bolts. I was told that if they did have them, I would probably have to special order them with a minimum. I told her to check it out. About a week later when I went to see what she found out, I was told that she no longer worked there. This place thinks a 90 percent turnover rate is good. I did not bother asking that goober because he seemed to be more concerned with talking with his Boy/Girlfriend on his cell phone.

I will just check out the Farm and Fleet bolts for specs. They have several types in the same sizes so I assume as you suspect, they do have the higher grades.
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Old 06-18-2011, 05:01 PM
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Pat, I have looked for carriage bolts other than grade 2 for a long time. (Elevator bolts too). But I've never found any and have been told they don't exist many times. If you find different I'd love to know! Plow (or plough) bolts are a different story, I believe they are grade 8.
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Old 06-18-2011, 05:15 PM
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Grade 5 carriage bolts: http://www.nutsandbolts.com/bolts-ca...-c-31_153.html
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Old 06-19-2011, 12:30 AM
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The link you provided is so informative I think it would be nice to have it placed in our "General Welding Information" files for future use.
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Old 09-15-2011, 07:52 PM
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One of the biggest things and the most over looked is lubrication, a dry bolt just doesn't tighten. We use as much penetrating spray for assembly as for loosening.
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Old 09-16-2011, 01:33 AM
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Quote:
Originally Posted by Pat View Post
USMCPOP,

I have some projects coming up that will have me punching some square holes for the bolts. This time around I will be just tack welding the bolt heads so they do not fall out into an area where they could be hard to retrieve, or cause some damage. One time I asked at Fastenal if they had any grade 8 carriage bolts. I was told that if they did have them, I would probably have to special order them with a minimum. I told her to check it out. About a week later when I went to see what she found out, I was told that she no longer worked there. This place thinks a 90 percent turnover rate is good. I did not bother asking that goober because he seemed to be more concerned with talking with his Boy/Girlfriend on his cell phone.

I will just check out the Farm and Fleet bolts for specs. They have several types in the same sizes so I assume as you suspect, they do have the higher grades.
If you have a finning in your area or any place that sells plow blades, loader edges, dozer blades... they will carry grade 8 plow bolts...

Too bad you weren't in British Columbia... The place I work at sells the above items and hardware too... the 2 brands of bolts we have is Ajax - which I beleive is an Australian company and the other is Formost threaded products - f-911
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