What is a fluid connector? FLUID CONNECTORS. The broadest line of fluid connector products and parts. We offer the broadest line of fluid connector products and parts including tube fittings, hose and hose fittings, quick couplings, brass products and related assembly fabrication equipment.What is a fluid film? Fluid film keeps parts rust-free and moving freely. Fluid Film is a solvent-free, lanolin-based rust/corrosion preventive and lubricant that provides long term protection and lubrication for all metal surfaces.What is a fluid filter? Filter (chemistry), a device which separates solids from fluids (liquids or gases) by adding a medium through which only the fluid can pass Filter (aquarium), critical components of both freshwater and marine aquaria. Filter paper, a semi-permeable paper barrier placed perpendicular to a liquid or air flow.