This standard specifies the nominal diameter d = 1 ~ 20 mm, the tolerance is m6, the material is steel: type A (ordinary quenching) and type B (surface quenching), and cylindrical pins of martensitic stainless steel.
GB/T 119.2-2000 history
2000GB/T 119.2-2000 Parallel pins, of hardened steel and martensitic stainless steel(Dowel pins)