Used on boeing b757 aircraft. cross, tube flareless-reducer tube size accomodated first end 0.500 inch diameter; second end 0.500 inch diameter; third end 0.375 inch diameter; fourth end 0.375 inch diameter; each end angled 90.0 degrees plus or minus 1.5 degrees to ends on either side; surface treatment - fluoride conversion coating per sae-AMS2486 - optional anodize, color dull gray per boeing approval of manufacturer's process
