Personally, I think AICC should be punted over the goal post of so long compliance standards. and some vendors like to offer multiple choices, and yes AICC does different things, but so does driving a moped and I rarely seen people cruising down the interstate on one (unless you live in LA).
Part One: How to Measure Thread Size. 1  In general, the thread should match the fabric in size and weight. For heavier, thicker fabrics, use heavier thread. 2  Heavier threads create more visible stitches. 3  V-69 is the heaviest size recommended for sewing machines. 4  Heavier threads are stronger.
thread pitch and size. Hello! I am rying to figure out the thread pitch and size of a valve stem, just like on your car tire where the valve cap goes. All I have is a metric thread pitch gauge and I come up with 8mm with a .8 thread pitch. But I am not too sure if it is not an american std pitch as I do not have a gauge to cross reference.