The Waveguide Quick Connect is used to connect and disconnect mating flanges of waveguides efficiently and reliably without any complications. It uses thumb screws to effortlessly clamp two flanges together to create a perfect connection for two mating waveguides that eliminates tedious waveguide screw alignments to avoid the signal leakage and impedance mismatch due to waveguide mating misalignment. 

 https://www.eravant.com/products/test-hardware-accessories/waveguide-quick-connects