Robertson screws
- Thread starter oldspert
- Start date
Model "A" Fords
Senior Member
The Robertson screws are not Metric on your 1929 Canadian car. They will be standard stuff like #8-32, #10- 24, #10-32..... just like you have on US cars. There was someone in US that was making reproduction Robertson screws, I don't recall the name.
In our local hardware store I picked up brand new Robertson style stainless steel screws. I knew they were very slightly different and the stainless is a different color than Nickel. They were on the car in plain view for ten years and I wondered when someone would notice them as to me they were obviously wrong.
The person that noticed them finally, was a Canadian Judge. He was the only one and he wasn't very close to the car but spotted them through a closed window. He went by them and said " you know those screws are wrong, I have a few left that are correct!"
That's what I love to here! I was beginning to think nobody could see a difference.
Bick in New Zealand
Well-known member
Can anybody tell me the thread size for the screws that hold the rear window frame together for open cars, as I need to find a source for the Robertson version.
fundytides
Well-known member
#5-40. Let me know if you find any. I would like to have some as well.
Bick in New Zealand
Well-known member
Will do.
fundytides
Well-known member
I could also use some #5-40 cage, or just regular, nuts to repair my original window frame
rackops
Senior Member
I haven't been able to find Robertson screws in anything other than #6, #8, #10, and 1/4. The cars take a #5 and #12, but I can't find them anywhere.
Yes, I have asked a LOT of people and always get the "I can find all the Robertson screws I ever need at the local store!" But, of course...never a size #12. I've even reached out directly to manufacturers, and...nothing. I can get 1000 made for 60 cents (US) each, but that gets to be an expensive hobby.
Yes, I have asked a LOT of people and always get the "I can find all the Robertson screws I ever need at the local store!" But, of course...never a size #12. I've even reached out directly to manufacturers, and...nothing. I can get 1000 made for 60 cents (US) each, but that gets to be an expensive hobby.
Russell Reay
Well-known member
Interesting observation. I thought I was experiencing a manufacturing glitch when I discovered none of the hardware stores in my area carry #12 screws. I don't need Robertson, but blade or phillips #12 would be handy without buying little packages dedicated to a single application
oldspert
Senior Member
I have found some stores have 3/16 course thread screws which is actually a #12-24.
Model "A" Fords
Senior Member
American Standard #8 - 32/36 Basic outside thread diameter is 0.164"
British Standard 3/16 - 24/32 Basic outside thread diameter is 0.1875"
American Standard #10 - 24/32 Basic outside thread diameter is 0.190"
American Standard #12 - 24/28 Basic outside thread diameter is 0.216"
American Standard 1/4 - 20/28 Basic outside thread diameter is 0.250"
oldspert
Senior Member
Has nothing to do with other sizes. Just commenting that 3/16 is sold in some hardware stores and is the same as a #12-24 or #12-32.
Also check out McMaster-Carr. https://www.mcmaster.com/
johnneilson
Well-known member
No, the standard numerical sizes as follows;
starting with a "0" the major diameter is .060
add .013" for every number up
"2" is .060 + .026
"4" is .060 + .052
this from 7th grade machining class, I guess schools are missing out now...
J
Interior Robertson screw kits for most of the A body styles are available from Mikes "A" Ford-able Maysville GA. WWW.mikes-afordable.com. Right there in USA
Robertson screws used in the Canadian A's are imperial /US system threads.
Hope this is of help. Windy here in NZ.
Happy Motoring
Robertson screws used in the Canadian A's are imperial /US system threads.
Hope this is of help. Windy here in NZ.
Happy Motoring
