Used on model ft4a gas turbine engine onboard 378 whec and 400 wagb coast guard vessels. 1.633" outside diameter metal with PWA36067 graphite filler circular
6.875" outside diameter non-asbestos material. gasket has two round tabs on inside of aperture, 180 degrees apart with 0.375 in dia. bolt hole. bolt hole circle 5.625 has two round tabs on inside of aperture, 180 degrees apart with 0.375 in dia. bolt hole. bolt hole circle 5.625 circular