MD ISO Blazer Jimmy spare tire carrier carriage bolt

[Zac72blazer]

ISO Blazer Jimmy spare tire carrier carriage bolt...and nut

[smupser]

I’m just curious and this question may be ignorant as I’m not completely sure, I have a couple of carriers that I’m restoring, I have the carriers and oversized washers, but as far as the bolts go, isn’t it almost exactly like a carriage both readily available at any hardware store?

[Zac72blazer]

Ya probably pretty close.

[franken]

https://www.google.com/search?q=gm+3991023+bolt

[Zac72blazer]

WOW 👏 what a genius I never thought about using Google...thanks

[franken]

It's easier, though less productive, to ask, then wait hours, than do a search that returns answers in a second or check a hardware store, where nuts and bolts live.

[Zac72blazer]

Originally Posted by franken

It's easier, though less productive, to ask, then wait hours, than do a search that returns answers in a second or check a hardware store, where nuts and bolts live.

Maybe....just Maybe I already did a search. 🤔

[71K5Randy]

69-72 is a 7/16 fine thread carriage bolt that is over 6” long. Hard to find that as common hardware, if they exist at all. GM used a lug nut to fasten the wheel, hence the 7/16 fine thread bolt.
73+ changed to a 1/2 coarse thread and z-bar wing nut, so common carriage bolts are easy to come by in that thread.
The washers were identical across years.
Hope that helps.

[Zac72blazer]

Originally Posted by 71K5Randy

69-72 is a 7/16 fine thread carriage bolt that is over 6” long. Hard to find that as common hardware, if they exist at all. GM used a lug nut to fasten the wheel, hence the 7/16 fine thread bolt.
73+ changed to a 1/2 coarse thread and z-bar wing nut, so common carriage bolts are easy to come by in that thread.
The washers were identical across years.
Hope that helps.

Thanks that helps some., but I need an example to measure.