Olympus 190 Series Port Nut This port nut is a compatible replacement part for Olympus 190 series flexible endoscopes (GIF-190 CF-190). It secures the ports and connectors in the control section of the endoscope. Key Features Precise threading for a secure fit Corrosion-resistant stainless steel Knurled surface for easy tightening Direct-fit replacement, no modification required Specifications Compatible Model GIF-190 CF-190 Material Stainless Steel Function Port Fastening