Help - M12 Bolt needed....

[skid]

I need 4 M12 bolts 100mm long with a 1.25mm thread pitch, and most importantly they must have a high shear strength rating as they need to hold a V8 engine on a stand.

It's an unusual combination and haven't had any luck locally. Anyone any ideas???

Cheers
Mark

>>> Edited by skid on Monday 17th January 14:06

[eliot]

First punt in google:
<a href="http://www.google.co.uk/search?hl=en&q=m12+1.25mm&btnG=Search&meta=cr%3DcountryUK%7CcountryGB">www.google.co.uk/search?hl=en&q=m12+1.25mm&btnG=Search&meta=cr%3DcountryUK%7CcountryGB</a>

Reveals
www.namrick.co.uk/product.asp?PID=580&PTTID=1&PCID=9

>> Edited by eliot on Monday 17th January 15:11

[B19GRR]

I'd go with Namrick too. Very good service.

Interesting that I've got an engine on a stand being held by 4x100 M12x1.25 bolts as well, guess they're not all that rare after all!

Cheers,
Rob

[skid]

Cheers guys.

Haven't heard of Namrick before, but they're page marked and the bolts already ordered!

They only do 8.8 tensile grade, should they be ok to take a 250-300kg engine on a stand for some time???

Cheers again.

M

[stevieturbo]

Ive used plain old mild steel M10 rod to hold engines onto stands before.

Rover V8 uses 3/8" UNC, and my LS1 uses M10x1.5

I even spaced the Rover out with the rod, so I didnt ahve to remove the clutch. The rod bent a little but it stayed put on the stand with no problems.
That was complete engine, heads etc including turbos and manifolds.

[eliot]

Yes, that did get me thinking about bolts, because Ive used std bolts on fully dressed v8's and iron chevy lumps - I started wondering whether i should use HT bolts....

e.

[GreenV8S]

skid said:

I need 4 M12 bolts 100mm long with a 1.25mm thread pitch, and most importantly they must have a high shear strength rating as they need to hold a V8 engine on a stand.

I think you may be overspecifying this, four ordinary mild steel M12 bolts in shear would easily carry the engine, in fact I expect they'd carry the whole car.

[stevieturbo]

Most ordinary bolts are 8.8spec anyway. HT are usually 12.9.

No idea what mild steel is.

[skid]

stevieturbo said:

Most ordinary bolts are 8.8spec anyway. HT are usually 12.9. No idea what mild steel is.

Is that right?

Namrick only carried 8.8 and they seemed happy with the use they were being put to when I spoke to them again today.

I think I will just make sure my head is never underneath the block perhaps as a precaution.

M

[stevieturbo]

Besides, the 8.8, or 12.9 refers to its shear strength anyway.

On a stand, they wouldnt bo totally in shear, as they will be relying a lot on the thread strength.

either way, you dont need anything fancy for holding an engine on a stand

[grahambell]

stevieturbo said:

Most ordinary bolts are 8.8spec anyway. HT are usually 12.9.

Not so. Grade 8.8 is high tensile. They might be 'ordinary' in automotive use but that's simply because it's not worth manufacturers risking a failure by fitting lesser fasteners, which would cost about the same anyway.

[steve_D]

skid said:

.......I think I will just make sure my head is never underneath the block perhaps as a precaution.......

That's why you have an engine stand so you don't need to put your head underneath it.
Toes, now that's another matter.

Steve