For connections where space is at a premium.– Ground (finer grinding quality, less roughness depth) – Short grinding for apertures with low space availability and lower tightness requirements – Tight closure due to standard ground joint – Glass articles for further processing – For connections where space is at a premium.– Ground (finer grinding quality, less roughness depth) – Short grinding for apertures with low space availability and lower tightness requirements – Tight closure due to standard ground joint – Glass articles for further processing –