Valid points, Randall. Still, more information than I had before! Herb On Jan 4, 2008 9:08 PM, Randall <tr3driver at ca.rr.com> wrote: > > > Covers all different threads used. > > Not all, by a long shot. No mention of British Associated, for example, > and I don't even see spark plug threads (14 x 1.25). > > Randall