NF E29-591-20*NF EN 1254-20:2021 Copper and copper alloys - Plumbing fittings - Part 20: Definitions, thread dimensions, test methods, reference data and supporting information
2021NF E29-591-20*NF EN 1254-20:2021 Copper and copper alloys - Plumbing fittings - Part 20: Definitions, thread dimensions, test methods, reference data and supporting information