Before I run out of money, I want to get the glass for the windshield of my '25. I want to use the original nickeled brass channel too. So what thickness of safety glass will fit. Forget correct bugs--somewhere here I have a Ford oval XXX rubber stamp and some acid to make a "correct-looking" bug.
I've seen all sorts of posts but cannot remember seeing a definitive
Take it to an automotive glass shop. Take the channels too. Tell them what you want. They will help you.
I took mine to one, used the original channels, and 1/4 in safety glass, without the modern markings (specifically told them I didn't want modern etchings in the glass), and they did exactly what I asked.
So, I should request 1/4" thick glass?? I know the owner of the local shop, so I should have no problem, but they aren't familiar with the channel fillers (I have no problem putting it in myself--in fact, I will want to polish the exposed edge myself, as their sander doesn't leave it smooth enough for my tastes.
Here is what was wrote in a previous thread:
"Laminated safety glass comes rated AS1 and AS2
AS1 is slightly thicker and is the only thing legal for windshields.
AS2 is legal for side and rear windows.
Some early antique car windshields have very narrow grooves and will not accept the thicker legal AS1. The trick is to have the glass cut so it leaves the AS2 off of the finished piece. Glass shops will not and can not legally install AS2 in a windshield but they will cut it for you to your pattern as I have detailed here. Just do not tell them that it is for a windshield. Then you take it home and install it. We wrote the safety rules for mandatory safety glass in anitque cars in the 1960's, but we carefully only stated safety glass and not AS1.
Your glass shop will know how much space to allow when you show them the type of mounting you are using such as felt lined channel or a rubber grommet type of installation. I am not familiar with enclosed Model T's because none of my seven T's were enclosed, they were all open cars and several had no windshield at all.
The third type of safety glass is the tempered or pop corn glass which shatters into little crumbs and not sharp jagged dagger like shards. I don't know if they can cut that type of glass to size, I just don't know that much about it.
I would go for laminated AS2 and if AS1 will fit in your windshield frame, go for it. The way judges look for safety glass in a vehicle in order to pass it for a tour is to look at the number of reflections. Plate glass has two and laminated safety glass has four."
It seems that AS1 is 6mm and called 1/4" think but is really closer to 15/64" thick. I measured it at 0.234"
I just had my windshield glass in my 1923 touring / pickup replaced with laminated glass at the local glass shop in my home town (the town is so small it doesn't even have a Walgreens). They did a great job. I just measured it and nearest I can tell it is 9/32 inch thick.