ISO International Standard

ISO 10513:2012 specifies the characteristics of prevailing torque type all-metal hexagon high nuts with metric fine pitch thread with nominal thread diameters, D, from 8 mm up to and including 36 mm, in product grade A for diameter sizes up to and including 16 mm and product grade B for diameter sizes above 16 mm, and with property classes 8, 10 and 12.