Core mounts - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**desertnick69** · 02-08-2014, 05:11 PM

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** · 02-08-2014, 09:06 PM

7/16-14 x 4"

**desertnick69** · 02-08-2014, 10:48 PM

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

franken · 02-08-2014, 11:06 PM

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

gale · 02-08-2014, 11:12 PM

Quote:

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** · 02-09-2014, 03:55 AM

Quote:

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!

**chiefcfd** · 02-09-2014, 11:45 AM

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 · 02-09-2014, 12:23 PM

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.

02-08-2014, 05:11 PM	#1
desertnick69 Senior Member Join Date: Jan 2012 Location: Phoenix, Arizona Posts: 498	Core mounts 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.

02-08-2014, 09:06 PM	#2
chiefcfd Senior Member Join Date: Oct 2010 Location: Cadiz, Ky Posts: 512	Re: Core mounts 7/16-14 x 4" __________________ 1972 Chevy LWB Roadster 1999 Chevy Silverado 2wd 2015 Chevy High Country 4x4 Crew Cab

02-08-2014, 10:48 PM	#3
desertnick69 Senior Member Join Date: Jan 2012 Location: Phoenix, Arizona Posts: 498	Re: Core mounts 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

02-08-2014, 11:06 PM	#4
franken Registered User Join Date: Jun 2013 Location: Somewhere Posts: 3,068	Re: Core mounts I can't say it's vital, but a grade 5 bolt would make me feel better if it was me...

02-09-2014, 11:45 AM	#7
chiefcfd Senior Member Join Date: Oct 2010 Location: Cadiz, Ky Posts: 512	Re: Core mounts 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. __________________ 1972 Chevy LWB Roadster 1999 Chevy Silverado 2wd 2015 Chevy High Country 4x4 Crew Cab

02-09-2014, 12:23 PM	#8
Terry Crist Registered User Join Date: Aug 2013 Location: Manteca, California Posts: 59	Re: Core mounts 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.



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