Thank you John:
I appreciate your research and answer to my quandry.
John Slade <edalsj@igs.net> wrote:
>Since we didn't seem to be getting anywhere, I went to my spare set of
>seats which have never (to my knowledge) been taken apart, and removed
>one of what I think are the screws under discussion.
>
>It measures as follows:-
>
>head.....flat head, slotted, 100 degree underneath
>length.....2.46"...call it 2 1/2"
>diameter.....0.246"...call it 1/4"
>thread.....fully threaded 26 tpi
>
>This screw equates to 1/4 British Standard Fine
>
>
>Hope this helps
>
>John Slade
>Manotick, ON
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