This International Standard specifies the dimensions and tolerances of resistance spot welding electrode caps, where a female taper (see ISO 1089) is used to fix the cap to an electrode adaptor (see ISO 5183-1 and ISO 5183-2)
EN ISO 5821:2009 Referenced Document
ISO 1089 Resistance welding equipment — Electrode taper fits for spot welding equipment — Dimensions
ISO 17677-1 Resistance welding - Vocabulary - Part 1: Spot, projection and seam welding
ISO 5182 Resistance welding - Materials for electrodes and ancillary equipment
ISO 5183-1 Resistance welding equipment - Electrode adaptors, male taper 1:10 - Part 1: Conical fixing, taper 1:10
ISO 5183-2 Resistance spot welding - Electrode adaptors, male taper 1:10 - Part 2: Parallel shank fixing for end-thrust electrodes
EN ISO 5821:2009 history
2009EN ISO 5821:2009 Resistance welding - Spot welding electrode caps