Front beam bolts to head?

Gene-C · Post by **Gene-C** » Tue Jan 24, 2006 4:33 am

What is the diameter of the bolts that hold the fromt beam on to the head? I want to thru bolt with lock nuts on the other side and need to know diameter to buy them tomorow!

Gene-C · Post by **Gene-C** » Tue Jan 24, 2006 8:09 am

i think i used half inch by 6 inch grade 8 bolts with lock nuts

Gene-C · Post by **Gene-C** » Tue Jan 24, 2006 5:51 pm

Did you have to drill the threads out in the head to thru bolt with the 1/2 inch bolt? The original bolts are metric and a 1/2 inch stantard wont thread...

Reverb · Post by **Reverb** » Tue Jan 24, 2006 6:12 pm

If you have a hardware store near by, take one of the original bolts with you, find a metric nut that fits it.

TMc2548 · Post by **TMc2548** » Tue Jan 24, 2006 6:20 pm

I think its a 12mm x 1.5 thread bolt. Not too sure. Its been awhile since I tapped out the head.

Gene-C · Post by **Gene-C** » Tue Jan 24, 2006 6:45 pm

Ok I want to replace them with stardard thread/diameter stainless steel bolts. What would be the equivalent to 12mm in inches? That way I can buy a drill bit to knock out the threads in the head and thru bolt with the S/S bolts and lock nuts.

Gene-C · Post by **Gene-C** » Tue Jan 24, 2006 7:05 pm

yes i drilled them thruogh

Gene-C · Post by **Gene-C** » Tue Jan 24, 2006 8:53 pm

1/2 inch = 12.5mm From my old dual dimensioning days. Wild Mike

Gene-C · Post by **Gene-C** » Tue Jan 24, 2006 9:02 pm

So then a 1/2 inch drill bit will actualy make the hole a tiny bit larger (.5mm) and knock off the threads as well? Then Ill just use a 1/2 bolt right?

Gene-C · Post by **Gene-C** » Tue Jan 24, 2006 9:44 pm

OK ... I was a little off. The 1/2" is actually 12.7mm ... hey it was over 20 years ago. If you're going to use a 1/2" bolt then you will need to drill it over size. You need to use at least a 9/16" drill. The site I just checked said 15%-20% larger hole than the bolt size. Wild Mike

Gene-C · Post by **Gene-C** » Tue Jan 24, 2006 10:00 pm

Why would I want a larger hole than the bolt itself? Any particular reason? I have drilled 1/2 inch holes before and used a 1/2 bolt with no prob...then why?

Gene-C · Post by **Gene-C** » Wed Jan 25, 2006 3:11 am

Alex DON'T use stainless. Most stainless is very brittle and only rated to grade 3. MURZ

Gene-C · Post by **Gene-C** » Wed Jan 25, 2006 3:35 am

Then how do I get a clean look ? Titanium jaja kidding! Will have to go with galvanized then...

Gene-C · Post by **Gene-C** » Wed Jan 25, 2006 3:40 am

I used phosphate coated iridium. Looks slick!!!! Strong too!!!! HEHEHE

Gene-C · Post by **Gene-C** » Wed Jan 25, 2006 3:44 am

And u thru bolted with a lock nut on the other side? Where do you get those bolts from? Local hardware store? Havent seen them.....