ČSN EN 6139

This document specifies the dimensions, tolerances and required characteristics of protective caps, non-metallic, for EN 6123 fitting ends to seal fluid ports during transportation and storage in order to prevent - contamination by moisture, fluids, chemicals and particles, - spillage inside package or aircraft section, - port and pipe end damages and - port and pipe clogging due to plug ingestion. Because of the cleanliness requirements, parts shall only be used once.