The Caterpillar SOS7-16-20THD Quick Disconnect Valve is a CAT SOS fluid-sampling valve with a 7/16-20 THD external thread designed to couple with standard SOS sampling ports for drawing oil samples without shutting equipment down. It features STOR sealing to provide a reliable, leak-free quick-disconnect connection during sample collection from engine oil, hydraulic oil, or drivetrain circuits. This valve is used in Cat S•O•S sampling workflows to enable on-machine sampling for laboratory analysis, and it is commonly listed with SOS sampling hardware and Cat service procedures for routine oil analysis.
