The following standards:

* NF A35-020-1 "Steel products - Couplers for ribbed or indented concrete reinforcing steels - Part 1 : requirements concerning the mechanical properties"
* NF A35-020-2-1 "Steel products - Couplers and anchoring devices for ribbed or indented concrete reinforcing steels - Part 2-1 : tests methods for couplers"
* NF A35-020-2-2 "Steel products - Couplers and anchoring devices for ribbed or indented concrete reinforcing steels - Part 2-1 : tests methods for anchoring devices and couplers to weld"

dated June 2011 are just issued by AFNOR.