Good place to buy grade 8 bolts?

[The motor guy]

Th threads on one of my exhaust manifold bolts for my boat is messed up and I can't get it to thread in by hand. It's the bolt, because it doesn't fit in any of the holes. It's a 3/8" bolt that's like 6" long. Tractor supply may have them, but they only have them in 1/2" increments

 

[AutoMechanic]

Around here Ace Hardware has the best selection but Lowe’s and Home Depot offer some as well not sure in what increments though. Also Rural King tends to have a lot too.

 

[clinebarger]

What's the Under Head Length? Guessing this is 3/8"-16.

 

[Snagglefoot]

Larger cities usually have a place like the Bolt Supply House.

 

[MParr]

Your local nut and bolt supplier.
You could try Ace Hardware. If they are fine threads, you may not find them at Ace Hardware.

 

[SC Maintenance]

mcmaster.com. You will need to buy a few at once, but that is my go to. Better than driving all over town.

https://www.mcmaster.com/products/s...gth-grade-class~sae-grade-8/hex-head-screws~/

3/8-16 x 6 inches - they have full threaded or partially threaded. $16 to $20 for qty 5, grade 8.

 

[MasterSolenoid]

McMaster.com

They will list every size, grade, and material possible.
Once you know it exists, .... then you can shop locally.
If 'not' available locally, order from McMaster-Carr.
Delivery in two days.

 

[DriveHard]

If you need it same day, Fastenal BAM has been a go to for my professional search for quality fasteners. I would say they are too expensive for my personal cash, and I will usually rely on McMaster or a certain niche hardware store.

 

[Urshurak776]

Bolt Depot is pretty good. I use them from time to time.

https://boltdepot.com/

 

[D60]

Call your local CAT dealer. "Not a joke"

 

[tnt_motorsports]

Try your local farm store. In Iowa I use Blains farm & fleet or Thiesens.

Just my $0.02

 

[nomas]

I've found a huge assortment of hardware at Lowe's . Even some specialty stuff like Grade 8 , etc. Home Depot too but their displays aren't kept up as neatly .

 

[D60]

Also CAT will sometimes stock length variations in increments of 1/8". Although at 6" they might not.

While you're there see if you can get a catalog of rebadged SnapOn tools

Don't be afraid to trim a longer bolt as needed, provided enough thread length remains.

 

[vwmaniaman]

You can shorten a longer bolt by just installing your die on the threads before you cut it off. Cleans up the threads when you take it off then.

 

[D60]

You can shorten a longer bolt by just installing your die on the threads before you cut it off. Cleans up the threads when you take it off then.

Or just chamfer it on a belt sander. If the nut still won't start, chamfer a little more.

But never a bad idea to pre-install a nut. It'll act as a thread chaser well enough when you remove it.