ČSN EN 17177

This document specifies the dimensional requirements for the 26 mm diameter, 6 mm height crown cap, lined with a plastic gasket and designed to seal bottles with neck finishes foreseen for pry-off or twist-crown applications. It specifies the dimensional requirements that are of direct importance to the customer/bottler and recommendations for cap application. The gasket material and profile are not specified as a number of different profiles are available depending on the end use and supplier specific technology. The requirement placed on the gasket profile design is that it needs to be fit for purpose used in conjunction with glass finishes in reference.