Historical
ANSI/ASME B1.10M-1997
Unified Miniature Screw Threads
Specifies the thread form, series, tolerance, and designation for the unified miniature screw thread. The series covers a diameter range from 0.30 mm to 1.40 mm and thus extends metric m-profile and unified thread series that begin at 1.6 mm.
American Society of Mechanical Engineers [asme]