Ed, Mike and All,
I believe that the very early 100's may have had Whitworth and BA fasteners
on the windscreen, but not on the majority of the later cars. I have
copies of the factory measured drawings of the knurled knob assemblies that
were first used to make up accurate reproductions some 20 years ago, and
the threads are all Unified, UNF to be specific and with UNC used for the
windscreen locating posts.
Regarding the screws for the chrome side pieces to the frame, they were
originally steel. I used brass 10-32 screws when I replaced them (hardware
store) and I've attached photos of the replacements that I've made. It was
very simple to turn down the heads using a drill and a file. You could
also use stainless steel like I did on the windscreen locating posts.
Curt
On Thu, May 30, 2013 at 5:20 AM, <fogbro1@comcast.net> wrote:
> Really? 10-32, not 2BA? Close, but not the same.
>
> Ed
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Repro knurled knobs (steel) circ. 1989.JPG]
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