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03-17-2005, 12:24 AM
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#1 |
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Weekend Warrior
Join Date: Oct 2004
Location: CT
Posts: 1,787
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Radiator support carriage bolt size?
 need the length and thread size so i can buy so new carriage bolts for my '69 supportanybody know what they should be? I looked in LMC figuring they have nice exploded views...but no bolt size Thanks
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-'07 GMC Sierra K2500HD -'66 C10 Suburban -'68/'71 K20 Service Bed Project -'69 Chevy C30 Mason Dump -'33Ford P/U 396ChevyPowered   
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03-17-2005, 07:59 AM
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#2 |
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Weekend Warrior
Join Date: Oct 2004
Location: CT
Posts: 1,787
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ttt
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-'07 GMC Sierra K2500HD -'66 C10 Suburban -'68/'71 K20 Service Bed Project -'69 Chevy C30 Mason Dump -'33Ford P/U 396ChevyPowered
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03-17-2005, 08:07 AM
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#3 |
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Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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The carriage head bolts are 7/16-14 x 3" long.
Jim |
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03-17-2005, 08:09 AM
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#4 |
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Weekend Warrior
Join Date: Oct 2004
Location: CT
Posts: 1,787
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Thanks, greatly appreciated....
hard to measure them when they aren't there
__________________
-'07 GMC Sierra K2500HD -'66 C10 Suburban -'68/'71 K20 Service Bed Project -'69 Chevy C30 Mason Dump -'33Ford P/U 396ChevyPowered
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03-17-2005, 08:47 AM
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#5 |
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Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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It is a real trick to measure them when they are missing!
Jim |
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03-17-2005, 09:58 AM
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#6 |
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Senior Member
 Join Date: Mar 2001
Location: Cedar Park, TX
Posts: 686
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Look for Grade-5 carriage bolts....and try to find compression nuts or at the very least nyloc nuts. The double nut trick works too. Also, there is a square washer that the carriage bolt goes in and it has a square knockout that prevents the bolt from turning, might want to look for these or make something similiar.
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71 Chevy C-10 SWB Fleetside RamJet-350/4L60e & Compushift/3.73Posi See it at www.prismnet.com/~grzanich |
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03-17-2005, 11:43 AM
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#7 |
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Senior Member
Join Date: Jun 2002
Location: Murray, Kentucky
Posts: 3,476
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Unless you're going for a 100% restore I would lose the carriage bolts and replace them with grade 5 hex head. Nothing is more frustrating than trying to remove a carriage bolt that keeps spinning. I know it may not be an issue for 20-30 years, but I like to think my trucks will still be around then!
Rg
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Roger '68 Short step - https://67-72chevytrucks.com/vboard/...d.php?t=849675 '69 ('70?) 2wd Blazer '70 GMC Jimmy 2wd '73 Firebird - https://67-72chevytrucks.com/vboard/...d.php?t=853203 |
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