Wherever there is milkweed there will be Monarch butterflies. The monarch is widely distributed across North America, from Central America northwards to southern Canada, and from the Atlantic to the Pacific coasts.
The pitch diameter (often called the effective diameter) of a parallel thread is the diameter of the imaginary co-axial cylinder which intersects the surface of the thread in such a manner that the intercept on a generator of the cylinder, between the points where it meets the opposite flanks of a thread groove, is equal to half the nominal pitch of the thread.
Axis of Thread. Major diameter. Mean (pitch) (d or c d ) diameter ( d or d )p. m. Unified and ISO Thread Geometry. Pitch (p) â The distance between adjacent thread forms measured parallel to the thread axis. Lead (L) â The distance the nut moves parallel to the screw axis when the nut is given one turn. TPI (n) â The number of Threads Per Inch, related to the pitch by 1/pn= .