ConFlat Zero Length Reducer DN275CF (13.25" OD), DN63CF (4.50" OD), ID 2.5,

Zero-length reducer flanges are used to change sizes within the CF family while producing the smallest possible transition footprint (only 1 flange thickness). These transition flanges allow thermocouple gauges or up-to-air valves to be quickly added to your vacuum system with minimal system alterations and minimal impact on system conductance.
Side A Flange Size : DN275CF
Side B Flange Size : DN63CF
Bore (In) : 2.5
Flange Height (In) : 1.12
Material: 304SS