Olympus 290 Series Port Nut This port nut is a compatible replacement part for Olympus 290 series flexible endoscopes (GIF-290 CF-290). 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-290 CF-290 Material Stainless Steel Function Port Fastening