Hardtop bolt size and count

[JohnyWard]

Does anyone know off hand what the size and count of the blazer hardtop bolts are? I just realized that my project vehicle was leaking because it doesn't have any of the bolts that hold the top on.

[red71cheyenne]

Do you have a single wall or double wall top? That will make a difference in the bolts. Single walls bolt down through the top to the bed, double walls bolt up from the bottom of the bedside.

[JohnyWard]

The bolts along the left and right rails go up through the sheet metal into the fiberglass top. So I think its the double wall.

So what are the advantages and disadvantages between a single and double wall top?

[Bentblazer]

Single wall (lighter and has dome lights, door glass has metal channel with weatherstrip)
Double wall (heavier no dome lights, door glass has weaterstrip only)
Bolt locations are different for both, there has been alot of discussion on this topic might do a search and find more, good luck

[awedel]

The bolt size is 5/16"x1" course thread.
Good luck

[red71cheyenne]

Mine were 5/16X18 as well on the double wall top.

When I rebuilt the top rails, I went with 3/8X16 to beef up the holding power.

[JohnyWard]

Thanks for the great information! Thats exactly what I needed to know.

[SeventyOne]

There are also 2 bolts that hold the top to the windshield frame that are longer and skinnier (don't know the exact specs). I can look for them and get a pic if not one else has the specs...

[JohnyWard]

I did notice those two on the corners were longer than the other bosses. However I didn't have any bolts in hand to check for 1/4 or 5/16 sizes. Pics would be great. I was just going to order a 25 pk of 5/16 course SEMS body bolts and figure out those two later.

[red71cheyenne]

The two in the center of the windshield frame are 5/16X18, 1" will work for those. On the two corner ones for the visors, they are 5/16X18 too, but you will need about a 2 and a half inch long bolt. If you put a flat washer under the head, you can still use the regular hex head bolt. I think originally, it was a phillips head screw.

[Joe Blaze]

can anyone advise the bolt size for a single wall top to bed mounting bolts?

[Joe Blaze]

i am picking it up tomorrow morning, if anyone could advise, i could stop at lowes on he way there.
thanks

[BobbyK]

This link may help you.

http://67-72chevytrucks.com/vboard/s...d.php?t=369523


10 bed-rail bolts, 2 sun visor bolts and 2 center windshield bracket bolts.





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[Joe Blaze]

Originally Posted by BobbyK

This link may help you.

http://67-72chevytrucks.com/vboard/s...d.php?t=369523


10 bed-rail bolts, 2 sun visor bolts and 2 center windshield bracket bolts.





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Bobby- thanks, that link was very helpful. I went to lowes and grabbed a set of the visor-to-top bolts for less than $3, and they worked great. I realized that it must have came with the double wall top originally, since none of the bolt holes line up on the bed rail to the top. It is a great reference. I copied the page with the photos and saved it in my Blazer folder for reference.
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