A same-size straight adapter with an AN10 male 37-degree flare on the hose side and an AN10 male O-ring port thread on the component side. AN10 is the volume size used for oil cooler feeds and returns, turbo oil drains, dry sump plumbing and large fuel supply circuits, where restriction matters far more than on a small gauge line. The straight port thread seals by compressing its O-ring against the face of the boss, so no thread sealant is needed and the joint can be broken and remade during servicing. Check the component genuinely has an AN10 O-ring port before fitting, as it will not seal in an NPT hole.