[rollei_list] Re: ?? True Sizes of Tripod Mounting Holes

Thank you for clarifying this point!  Ever since my old Praktiflex (in
1966!)  I've wondered why my many 3/8 equipped pieces didn't work on 3/8
thread......

Peter Nebergall

On Mon, 27 Aug 2007 16:12:55 -0700 (PDT) John Jensen
<jwjensen356@xxxxxxxxxxxxx> writes:
> Marc, I don't see that there is an equivalence to the
> Unified thread and to a standard metric thread.  For
> the 3/8-16 thread the pitch distance is 0.0625".  This
> is equal to 1.5875 mm.  The 3/8" (0.375") thread size
> is slightly smaller than an M10 which has a thread
> size of 0.3937" and a pitch of 1.5 mm.
> 
> If there were a hypothetical M9.5 thread (0.374") with
> a 1.5 mm pitch, it would come quite close to matching
> the 3/8-16 thread size.  But I don't see that there is
> such an animal.
> 
> John
> 
> --- Marc James Small <marcsmall@xxxxxxxxxxx> wrote:
> 
> > I would like to know the true specifications of 
> > the two common tripod threads.  I believe that 
> > the larger thread has a Metric measuremetn which 
> > works with an SAE thread.  I would appreciate 
> > your help in providing the SAE and Metric 
> > measurements for both the smaller and the larger 
> > mounts.  Extra points to those who can identify 
> > the actual pitch of the thread (DIN, SAE, or
> > Whitworth, or whatever).
> > 
> > Enquiring Camera Lore Fanatics Want to Know!
> > 
> > Marc
> > 
> > 
> > 
> > msmall@xxxxxxxxxxxx
> > Cha robh bàs fir gun ghràs fir!
> > 
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