ČSN EN 6140

This document specifies the dimensions, tolerances and required characteristics of protective plugs, non-metallic, for NAS1760 fitting ends and AS33649 boss ports 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.