Tow Hook Bolt Q's

[7wt]

I am having trouble finding Grade 8 12mmX1.25X80 bolts to replace my stock tow hooks. I was told grade 8 bolts in metric sizes are reffered to as 10.9. I can find metric grade 8.8 but I'm told this only eguals a standard grade 5 bolt. Do I really need the 10.9 or will the 8.8 work? This bolt stuff is a little out of my scope so any help would be greatly welcomed.

[Major Woods]

The 12mm bolt is .472 diameter so I'm giving you .500 bolt shear info (sorry I don't have exact metric numbers).

The 12mm bolts will be just little bit less than the number below.

Grade 5 is 14,730lbs of shear force.
Grade 8 is 17,874lbs of shear force.

I believe the grade 5 bolts (assuming 2 bolts per hook) should be fine for what your doing even if you subtract 10% because the above numbers are for a .500 diameter bolt instead of a .472 (12mm).

[AK98Taco]

I found them at an Ace Hardware.

Toyota also stocks them.

[MERCULA]

Try ABABA BOLT (a-babba) in Elcajon , They are on Pioneer way ,They got hardware stacked to the rafters . 619 440-1781

[7wt]

All they had was the 8.8 hardness. I went ahead and picked those up.

[jsmithjr732]

Having the same issue. Lowe's in Mission Valley stocks the 8.8, but they don't have a lot of them. They're around $5.62/each. Don't know if that's a lot or not, but gotta get em.

John

[hytenor]

I am having trouble finding Grade 8 12mmX1.25X80 bolts to replace my stock tow hooks. I was told grade 8 bolts in metric sizes are reffered to as 10.9. I can find metric grade 8.8 but I'm told this only eguals a standard grade 5 bolt. Do I really need the 10.9 or will the 8.8 work? This bolt stuff is a little out of my scope so any help would be greatly welcomed.

good luck, LOL I gave up long ago and drilled them out and retapped them for bolts that I could actually find.

what length do you need? I might have some in my bolt box.

[hytenor]

I found them at an Ace Hardware.

Toyota also stocks them.

dang, no one around here had that size and thread pitch.

doesn't matter anymore...got 5/8" bolts in there now ;)

[jsmithjr732]

Just realized that this was in the late Tacoma section--I have a 2003. I went to Lowe's to pickup the M12 x 1.25 x 80mm bolts--grade 5 (8.8). When I got there, I realized that they were way too long, so I went with 70mm (60mm was too short). This made the bolts slightly longer than the stock ones, but very close.

When I got home, I found out that "slightly" was too much, so I just added an extra washer to them. Unfortunately, you can't use the original washers from the stock bolts as they're pretty much locked onto them.

In the end, I used one of the Grade 8 bolts and one of the grade 5 (with two washers) on each of the tow hooks. I then tightened those guys until they couldn't be tightened no more. Seems that having one of the grade 8's on each side will help for the lesser strength grade 5's.

John