For closing internal threads in accordance with DIN 3852-1, DIN ISO 6149-1. The circumferential sealing lip (no mould-parting feature) and the O-ring prevent the penetration or leaking of liquids depending on the application. Made from premium impact-resistant polyamide. Same design as GPN 735 but fitted with O ring. For high leak proof requirements, e.g. untreated sealing surfaces, high process temperatures, long process times, and inreased pressure inside the component.