Core mounts

[desertnick69]

I had this up earlier but had wrong spelling of radiator. I need to know what size bolt "carrage bolt" goes in Radiator Support Mount on a 1970 C-20. I have two trucks here and 3 different size bolts, I think its 7/16 cause any thing smaller then that looks small.
any ideas will help.

[chiefcfd]

7/16-14 x 4"

[desertnick69]

Thanks chiefcfd. I thought thats the size but only one of them was. now it's down to Copperstae Nut & Bolts Monday.

Thanks again Nick

[gale]

Originally Posted by desertnick69

Thanks chiefcfd. I thought thats the size but only one of them was. now it's down to Copperstae Nut & Bolts Monday.

Thanks again Nick

I've never seen a 7/16 carriage bolt so I'll bet that is a GM part.

[desertnick69]

Originally Posted by gale

I've never seen a 7/16 carriage bolt so I'll bet that is a GM part.

I have looked in every hardware store here and no luck, So if Copperstate don't gat i'll just have to go across the street to the Chevy dealer they have always found what i need, Now the price we will see, only need two!

[franken]

I can't say it's vital, but a grade 5 bolt would make me feel better if it was me...

[chiefcfd]

If you can't find them check with a vendor on this site. Pretty sure they have them. GMC Pauls has them on there site.

[Terry Crist]

You can get them from McMaster-Carr http://www.mcmaster.com/#specialty-bolts/=qmby3w

But they are grade 2. They call them Round Head Square Neck bolts.