Metric Inch PRODUCT SIZEHARDNESSSTANDARDDowel Pin2mm to 16mmHRC 50-58 (core)As Per Unbrako SpecificationSel-lok Pin1.5mm to 12mmHV 440 to 560ISO 8752 PRODUCT SIZEHARDNESSSTANDARDDowel Pin1/8 to 1HRC 50-58 (core)As Per Unbrako SpecificationSel-lok Pin1/16 to 1/2As Per Unbrako SpecificationASME B18.8.2Pull-out Dowel Pin1/8 to 1HRC 60 min (surface)As Per Unbrako Specification