Agilent Varian VHS-10 and VHS-400 Oil Drain Plug, Diffusion Vacuum Pump Replacement Parts. Agilent Varian Part Number: L9173001.
This is a replacement Oil Drain Plug. Fits the Agilent Varian VHS-10 and VHS-400 Diffusion Pump.
For location of the oil drain plug see figure #7 (diagram exploded view & parts illustration) below.