Grade 8 bolts bulk - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

MARKDTN · 12-02-2011, 10:03 AM

Quote:

Originally Posted by Meatman

If theres something strange or particular around here I need I go to Caterpiller. They have lots of sizes from small to huge, and their grade 8 stuff is pure d made in USA grade 8, not made by a chinaman grade 8.

Yes, and not only that but grade 8, USA made, case hardened. Most of theirs are made by LE which is Lake Erie hardware made in Frankfort Indiana. Cat has the best bolts out there. Not for every use and not cheap, but if you need a wierd length in an odd size, they probably have it. I needed an 11" long 7/16 bolt and they had that. 7/16 is not a common carry size around here. Cat had it.

BrianV · 12-02-2011, 03:04 PM

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Vintage Windmills · 12-02-2011, 03:29 PM

I'd trust grade 5 from a more reputable vendor than cheapo grade 8.

The statement that grade 8 is often used when unecessary is absolutely true if you are talking about legitimate grade 8. The stories of "it twisted off by hand" are definitely not legitmate grade 5's.

Vintage Windmills · 12-02-2011, 03:31 PM

Quote:

Originally Posted by MARKDTN

Yes, and not only that but grade 8, USA made, case hardened. Most of theirs are made by LE which is Lake Erie hardware made in Frankfort Indiana. Cat has the best bolts out there. Not for every use and not cheap, but if you need a wierd length in an odd size, they probably have it. I needed an 11" long 7/16 bolt and they had that. 7/16 is not a common carry size around here. Cat had it.

Good to know and good to hear there are still some bolts made in the USA. Do they have grade 5 as well?

treveiger · 12-02-2011, 04:08 PM

I bought only grade 8 working on the truck.... Couldn't stomach getting anything less unless had to.
Posted via Mobile Device

BuiltwithIvy · 12-02-2011, 04:46 PM

Just for reference grade 8 bolts are good for a lot of things, but use grade 5 bolts on suspension pieces, they will bend rather than shear if something goes wrong, or heaven forbid you end up in a wreck

MARKDTN · 12-02-2011, 05:19 PM

Quote:

Originally Posted by Vintage Windmills

Good to know and good to hear there are still some bolts made in the USA. Do they have grade 5 as well?

I don't know, never tried. I always use grade 8 for everything on a vehicle. I use grade 5 on some stuff around the house from the generic bins at Lowes or Tractor Supply. I went to a Society of Automotive Engineers (SAE) class for 2 days called "Threaded Fasteners and the Bolted Joint". To condense the class into one sentence, the teacher basically said to use grade 8 with a nylock nut for everything.

no moa · 12-07-2011, 03:17 PM

so how do i find the best grade 8 or the best grade 5? Are the marked specifically? I dont think my ACE here sells the good grade 8 USA stuff. I'd spend more on the USA parts.

BuiltwithIvy · 12-07-2011, 03:22 PM

Despite popular belief, there is no "best" grade 8 or "best" grade 5 bolt, to receive that grading it has to test at a certain tensile strength. Grade 8 bolts have 6 hash marks on the head, and grade 5 have 3 has marks on the head of the bolt, pick up whatever you need, Grade 8 shear(aka break) easier than grade 5 bolts, which have a tendency to bend, so if using on a suspension piece, make sure your grade 8 bolts have some type of double shear bracket...

no moa · 12-07-2011, 03:25 PM

I'm thinking of replaceing all the rivets holding on the rear leaf spring bracketts and need some new ones for the front suspension assembly were it attaches to the frame.

Whats a double shear bracket?

BuiltwithIvy · 12-07-2011, 03:29 PM

grade 8 should be more than enough, even grade 5 would work just fine, just remember to use locktite. as for double shear brackets, if you had a shock, with a tab on both sides of the shock, with a bolt going all the way through, that would be an example of a double shear bracket, where there are two places that absorb the tension, and hence have two places to shear.

BuiltwithIvy · 12-07-2011, 03:31 PM

hope this is helpful!

12-02-2011, 03:04 PM	#27
BrianV Registered User Join Date: Mar 2010 Location: Mesa, Az Posts: 364	Re: Grade 8 bolts bulk Please note that you must be a supporting member to post classified items. This includes but is not limited to What Its Worth, Want To Buy, Want To Trade, and For Sale. Please consider supporting the forum by subscribing. Further information on the subscription levels available are located here If you need any further assistance with that please contact any Admin for help. Last edited by 70cst; 12-02-2011 at 06:51 PM.

12-02-2011, 03:29 PM	#28
Vintage Windmills Vintage 4x4s Join Date: Sep 2010 Location: Prior Lake, MN Posts: 4,305	Re: Grade 8 bolts bulk I'd trust grade 5 from a more reputable vendor than cheapo grade 8. The statement that grade 8 is often used when unecessary is absolutely true if you are talking about legitimate grade 8. The stories of "it twisted off by hand" are definitely not legitmate grade 5's. __________________ 67 GMC K1500 Custom- 305V6 SM420, PTO, Ram Assist, yellow (the outcast) (project period correct upgrades) 67 GMC C2500 351V6 TH400, AC, PS, PB (can't decide what to do with. Update, decided to keep and will restore ) 86 CHV K30 502 th400, apple red NEW 71 CHV K20 350 SM465, ochre (saved work truck) 71 CHV K20 292 SM465, white, tach, PTO, (future project) 72 CHV K20 350 350th, medium blue (project stocker) 01 CHV K2500hd crew, indigo blue ^3 dont run and the others don't see winter either '86 K30 Cummins "Fireside" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=649649 '71 K20 "get driveable" thread: http://67-72chevytrucks.com/vboard/s...d.php?t=590642 '72 K20 Build Thread: http://67-72chevytrucks.com/vboard/s...=493477&page=6

12-02-2011, 04:08 PM	#30
treveiger Senior Member Join Date: Jul 2010 Location: South Dakota Posts: 4,093	Re: Grade 8 bolts bulk I bought only grade 8 working on the truck.... Couldn't stomach getting anything less unless had to. Posted via Mobile Device __________________ 1969 Chevy c20(Miss Hackjob)

12-02-2011, 04:46 PM	#31
BuiltwithIvy Registered User Join Date: Oct 2011 Location: Ithaca NY Posts: 251	Re: Grade 8 bolts bulk Just for reference grade 8 bolts are good for a lot of things, but use grade 5 bolts on suspension pieces, they will bend rather than shear if something goes wrong, or heaven forbid you end up in a wreck __________________ "To speak of the art of one loom, the art of one river, the art of one tractor, or the art of one automobile is not preposterous; it is to point to the size and importance of the gap between general knowledge and situated knowledge" - James C. Scott 1969 C10 - http://67-72chevytrucks.com/vboard/s...d.php?t=492064 1930 Tudor Sedan

12-07-2011, 03:17 PM	#33
no moa Registered User Join Date: Nov 2009 Location: maine Posts: 2,315	Re: Grade 8 bolts bulk so how do i find the best grade 8 or the best grade 5? Are the marked specifically? I dont think my ACE here sells the good grade 8 USA stuff. I'd spend more on the USA parts. __________________ 1972 C10 Deluxe.Shortbed. 402/400. A/C, white interior, needs complete restore. Project Red, white and blue. Used to be a Longbed apperently. http://67-72chevytrucks.com/vboard/s...d.php?t=451950 1971 c10 step 250 3 OTT 1969 c30 TOW-MATER. 307 4 speed, holmes 440 body. http://67-72chevytrucks.com/vboard/s...d.php?t=451082 2006 CTS-V LS2 6spd.

12-07-2011, 03:22 PM	#34
BuiltwithIvy Registered User Join Date: Oct 2011 Location: Ithaca NY Posts: 251	Re: Grade 8 bolts bulk Despite popular belief, there is no "best" grade 8 or "best" grade 5 bolt, to receive that grading it has to test at a certain tensile strength. Grade 8 bolts have 6 hash marks on the head, and grade 5 have 3 has marks on the head of the bolt, pick up whatever you need, Grade 8 shear(aka break) easier than grade 5 bolts, which have a tendency to bend, so if using on a suspension piece, make sure your grade 8 bolts have some type of double shear bracket... __________________ "To speak of the art of one loom, the art of one river, the art of one tractor, or the art of one automobile is not preposterous; it is to point to the size and importance of the gap between general knowledge and situated knowledge" - James C. Scott 1969 C10 - http://67-72chevytrucks.com/vboard/s...d.php?t=492064 1930 Tudor Sedan

12-07-2011, 03:25 PM	#35
no moa Registered User Join Date: Nov 2009 Location: maine Posts: 2,315	Re: Grade 8 bolts bulk I'm thinking of replaceing all the rivets holding on the rear leaf spring bracketts and need some new ones for the front suspension assembly were it attaches to the frame. Whats a double shear bracket? __________________ 1972 C10 Deluxe.Shortbed. 402/400. A/C, white interior, needs complete restore. Project Red, white and blue. Used to be a Longbed apperently. http://67-72chevytrucks.com/vboard/s...d.php?t=451950 1971 c10 step 250 3 OTT 1969 c30 TOW-MATER. 307 4 speed, holmes 440 body. http://67-72chevytrucks.com/vboard/s...d.php?t=451082 2006 CTS-V LS2 6spd.

12-07-2011, 03:29 PM	#36
BuiltwithIvy Registered User Join Date: Oct 2011 Location: Ithaca NY Posts: 251	Re: Grade 8 bolts bulk grade 8 should be more than enough, even grade 5 would work just fine, just remember to use locktite. as for double shear brackets, if you had a shock, with a tab on both sides of the shock, with a bolt going all the way through, that would be an example of a double shear bracket, where there are two places that absorb the tension, and hence have two places to shear. __________________ "To speak of the art of one loom, the art of one river, the art of one tractor, or the art of one automobile is not preposterous; it is to point to the size and importance of the gap between general knowledge and situated knowledge" - James C. Scott 1969 C10 - http://67-72chevytrucks.com/vboard/s...d.php?t=492064 1930 Tudor Sedan

12-07-2011, 03:31 PM	#37
BuiltwithIvy Registered User Join Date: Oct 2011 Location: Ithaca NY Posts: 251	Re: Grade 8 bolts bulk hope this is helpful! __________________ "To speak of the art of one loom, the art of one river, the art of one tractor, or the art of one automobile is not preposterous; it is to point to the size and importance of the gap between general knowledge and situated knowledge" - James C. Scott 1969 C10 - http://67-72chevytrucks.com/vboard/s...d.php?t=492064 1930 Tudor Sedan

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