ASD-STAN prEN 6139:2019

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;
— port and pipe clogging due to plug ingestion.
Because of the cleanliness requirements, parts shall only be used once.