3 bolts distributor advance screw

[feufeu]

Hi all,
does anybody know the size and thread of the advance screw on a 1937 3 bolts distrib? i have a distrib where this screw is worn.
thanks

 

[35fordtn]

10-32 x1/2 slotted hex screw s7 finish

 

[feufeu]

Many thanks ! i'm a little confused with the american threads

 

[feufeu]

35fordtn, I saw on your website you'r selling 1937 cars running boards cover. could you give me the shipping cost for france?
thks.

 

[Mart]

Feufeu, the smaller american threads (under 1/4") are numbered. 10-32, while not exact may be represented as 3/16" UNF.

If the screw is stripped sometimes adding a washer will get it onto a working part of the thread. if the hole is stripped it might be possible to tap m5 and use an m5 screw. If you have a 94 carb the top screws are 10-32 unf.
Mart.

 

[69a]

10/32 and m5x0.8 are exactly the same.

 

[Mart]

10/32 and m5x0.8 are exactly the same.

Well, not quite. 5mm is slightly bigger. Pitch is very similar.

A 10/32 nut will not thread on a 5mm bolt. Hence the suggestion in this case.

 

[feufeu]

Thanks Mart, yes i know the threads were numbered from 0 to 12 but i'm always embarassed with diameter
I just bought an other dizzy to have a spare in the car and this screw was worn. I tested the washer but it was worn on a too large part. So with the dimension I found a spare on internet.
I want some spare parts in the car because during holidays we are doing roadtrips in France. this July we drove 1800 Km