(3) or (4) Bolts...
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(3) or (4) Bolts...
Where can I buy (3) or (4), 3/8" dia. x 2-3/4" long UNF hex-head bolts in 300M quality??
I broke an ACE Hardware Grade-8 bolt that I was using to hold my mulch mower's, 21", "Gater", blade on with this morning so I want a stronger bolt!
Or somebody please tell me a better than Grade-8 bolt besides 300M quality to use in my application...
Thanks,
pdq67
PS., and I know that I am not supposed to be mulching 1" dia. sticks using my old commercial steel deck, green, Lawn-Boy mulch mower, but I do..
I installed a 5hp B&S engine on it and running about 1/2 throttle, boy does it mulch stuff up!!!
I broke an ACE Hardware Grade-8 bolt that I was using to hold my mulch mower's, 21", "Gater", blade on with this morning so I want a stronger bolt!
Or somebody please tell me a better than Grade-8 bolt besides 300M quality to use in my application...
Thanks,
pdq67
PS., and I know that I am not supposed to be mulching 1" dia. sticks using my old commercial steel deck, green, Lawn-Boy mulch mower, but I do..
I installed a 5hp B&S engine on it and running about 1/2 throttle, boy does it mulch stuff up!!!
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Re: (3) or (4) Bolts...
How about AN bolts that I believe are stronger than grade 8. I use them in certain applications. They in increments of 1/16" thickness. So an AN6 would be 3/8". An AN4 would be a 1/4", an AN8 would be 1/2" and so on.
Here is a link to one source. http://www.aircraftspruce.com/catalog/s ... nbolts.php
Here is a link to one source. http://www.aircraftspruce.com/catalog/s ... nbolts.php
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Re: (3) or (4) Bolts...
Caterpillar dealer nearby? The CAT bolts, grade 8 or 9 (some sizes are grade 9) are much better than what you buy at the hardware store. The price is good too.pdq67 wrote: ↑Sun Dec 03, 2017 8:09 pm Where can I buy (3) or (4), 3/8" dia. x 2-3/4" long UNF hex-head bolts in 300M quality??
I broke an ACE Hardware Grade-8 bolt that I was using to hold my mulch mower's, 21", "Gater", blade on with this morning so I want a stronger bolt!
Or somebody please tell me a better than Grade-8 bolt besides 300M quality to use in my application...
Thanks,
pdq67
PS., and I know that I am not supposed to be mulching 1" dia. sticks using my old commercial steel deck, green, Lawn-Boy mulch mower, but I do..
I installed a 5hp B&S engine on it and running about 1/2 throttle, boy does it mulch stuff up!!!
Sometimes a higher grade bolt isn't better. On a brand of excavator I worked on, the track frames were bolted on with 1 1/2" dia bolts. Grade 8 bolts broke, but Grade 5 held up.
Automotive Machining, cylinder head rebuilding, engine building. Can't seem to quit
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Re: (3) or (4) Bolts...
How about if I have a local Machine Shop turn down (1) SBC 300M head bolt, shorten it to 2-3/4" long and then put a 3/8" UNF thread on it??
Would it hold up or would there be too many stress risers on it??
I figure the head bolt will have rolled threads is why I ask..
pdq67
Would it hold up or would there be too many stress risers on it??
I figure the head bolt will have rolled threads is why I ask..
pdq67
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Re: (3) or (4) Bolts...
Don't make this so complicated.
Go to CAT as suggested and get a bolt.
The only reason that the original broke is
1: You hit one hell of a rock and there is likely other damage.
or
2: The bolt has been over torqued repeatedly with an over enthusiastic impact.
Go to CAT as suggested and get a bolt.
The only reason that the original broke is
1: You hit one hell of a rock and there is likely other damage.
or
2: The bolt has been over torqued repeatedly with an over enthusiastic impact.
Dave Koehler - Koehler Injection
Enderle Fuel Injection - Nitrous Charger - Balancing - Nitrous Master software
http://www.koehlerinjection.com
"Never let a race car know that you are in a hurry."
Enderle Fuel Injection - Nitrous Charger - Balancing - Nitrous Master software
http://www.koehlerinjection.com
"Never let a race car know that you are in a hurry."
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Re: (3) or (4) Bolts...
CAT part number 0L-0139
3/8"-24, 2-3/4" bolt length, 1.75" grip length,
9/16" hex head, phosphate and oil coated.
Prob around $2.00 a bolt.
Pick it up at a CAT dealer, authorized CAT truck or marine service shop, have one of these ship them to you or from cat parts online.
3/8"-24, 2-3/4" bolt length, 1.75" grip length,
9/16" hex head, phosphate and oil coated.
Prob around $2.00 a bolt.
Pick it up at a CAT dealer, authorized CAT truck or marine service shop, have one of these ship them to you or from cat parts online.
Automotive Machining, cylinder head rebuilding, engine building. Can't seem to quit
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Re: (3) or (4) Bolts...
0L-0139. List price $.81 eaKeith Morganstein wrote: ↑Wed Dec 06, 2017 5:06 pm CAT part number 0L-0139
3/8"-24, 2-3/4" bolt length, 1.75" grip length,
9/16" hex head, phosphate and oil coated.
Automotive Machining, cylinder head rebuilding, engine building. Can't seem to quit
Re: (3) or (4) Bolts...
I went out to our local Cat. Dealer and they didn't have any in stock like I want.
Would have to come out of St. Louis so I will just stop for now. I probably won't need my mulch mower until next spring.
Later,
pdq67
Would have to come out of St. Louis so I will just stop for now. I probably won't need my mulch mower until next spring.
Later,
pdq67
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Re: (3) or (4) Bolts...
MCMaster Carr 91257A662 pak of 10 $8.30
you know,...that may be the longest blade bolt I have run across.
you know,...that may be the longest blade bolt I have run across.
Dave Koehler - Koehler Injection
Enderle Fuel Injection - Nitrous Charger - Balancing - Nitrous Master software
http://www.koehlerinjection.com
"Never let a race car know that you are in a hurry."
Enderle Fuel Injection - Nitrous Charger - Balancing - Nitrous Master software
http://www.koehlerinjection.com
"Never let a race car know that you are in a hurry."
Re: (3) or (4) Bolts...
I have to admit that I MISS-TYPED, it's 1.75" long, not 2.75" long.
My bad.
pdq67
My bad.
pdq67
Re: (3) or (4) Bolts...
Some times what you need is a tougher bolt, not a stronger one...
Felix, qui potuit rerum cognscere causas.
Happy is he who can discover the cause of things.
Happy is he who can discover the cause of things.
Re: (3) or (4) Bolts...
Bill,
That is why I wanted 300M grade bolts because it is tougher than, "railroad spikes", imho!
pdq67
That is why I wanted 300M grade bolts because it is tougher than, "railroad spikes", imho!
pdq67
Re: (3) or (4) Bolts...
I suggest unbrako Allen head with harden washer. Without double checking specs AN bolts aren't better than grade 8,( G8's are too brittle). iirc.