Thread size

[Tiger]

Hello
Any idea what the thread size is of the window winder retaining screw.
Regards
           Tim

[Colin Morgan]

Hi

On my car (1937 ARR) - 2BA - 4.7mm O.D.

Regards
Colin

[Tiger]

Thanks Colin

[Ruairidh Dunford]

I think this is actually another 3/16 BSF thread (like the fan blade securing screws) - they are very similar to 2BA.

[Colin Morgan]

3/16 BSF = 0.1875" diameter and 32 threads/inch

      2BA = 0.1850" diameter and 31.36 threads/inch

You are right Ruairidh - they are very close - a new 2BA screw does fit - not sure what mine are now - they are somewhat worn, chromed but crossheaded, so not original?  

Colin

[Ruairidh Dunford]

Within a gnat’s hair of each other!

[David Cochrane]

... crossheaded, so not original? 

Definitely not!

David (who has replaced 47 cross-head screws on his RP saloon - 72 to go!)

[Colin Morgan]

David,

I agree, cross-head screws look terrible on a Seven - but they came with the car and I have nothing else chromed of that size (3/16" BSF or even 2BA!).

Regards,
Colin

[Zetomagneto]

David,

I agree, cross-head screws look terrible on a Seven - but they came with the car and I have nothing else chromed of that size (3/16" BSF or even 2BA!).

Regards,
Colin

Hi Colin, Try here, I have had good service for BA  https://www.polished-stainless.com/phdi/...rt=8#bolts

[Colin Morgan]

Thanks - Colin