DIN EN 1254-20:2021-10 Copper and copper alloys - Plumbing fittings - Part 20: Definitions, thread dimensions, test methods, reference data and supporting information; German version EN 1254-20:2021
2021DIN EN 1254-20:2021 Copper and copper alloys - Plumbing fittings - Part 20: Definitions, thread dimensions, test methods, reference data and supporting information; German version EN 1254-20:2021
2019DIN EN 1254-20:2019 Copper and copper alloys - Plumbing fittings - Part 20: Definitions, thread dimensions, test methods, reference data and supporting information; German and English version prEN 1254-20:2019