Screw clamp into fixture up to the top flange, and tighten to the recommended seating torque. Alternatively, the top flange can be recessed in a counterbored hole, for flush mounting. Threaded-cartridge clamps have O-ring seals on their outside diameter, so they require a precision mounting hole. Carefully follow hole-preparation instructions in the drawings. The overall depth of the bored hole must be strictly observed, because the bottom acts as a stop (to make the short length of this unit possible). The insertion chamfer and the entrances of the fluid passages into the bored hole must be rounded to avoid damaging the seals during clamp installation. Fluid passages must be drilled exactly as shown in the drawings. Do not use NPT fittings.