UNE-EN ISO 9100-4:2006
Envases de vidrio. Bocas de tarros para cierres al vacío (twist-off). Parte 4: 38 mm media (ISO 9100-4:2005)
Glass containers - Vacuum lug finishes - Part 4: 38 medium (ISO 9100-4:2005)
Récipients en verre - Bagues à crans pour bouchage sous vide - Partie 4: 38 medium (ISO 9100-4:2005)