Agilent, 500-2114, Ferrule, 0.4 mm id, graphite, 0.05 to 0.25 mm column, 10/pk

Agilent graphite ferrules create a compressed seal around narrow-bore capillary columns in compatible gas chromatography fittings. The ferrules have a 0.4 mm internal opening and are intended for columns with internal diameters from 0.05 to 0.25 mm, with the final mechanical fit determined by the column outside diameter and connection hardware. Graphite construction offers thermal tolerance for GC oven environments up to 450 °C and is suited to many selective-detector installations. Proper column insertion depth, nut tightening and leak checking are essential for stable carrier-gas flow and good peak shape. Excessive tightening can deform the ferrule or damage the column, while a loose connection may introduce leaks and retention-time drift. Replace ferrules when joints are reassembled or when seating surfaces become damaged. The ten-piece pack supports routine inlet and detector maintenance without replacing the complete fitting assembly.