Steel adapter for installing a late-model GM power-steering box while retaining early-style hoses with 5/8-18 female inverted-flare ends. Made in the USA and zinc-plated, this fitting converts an 18mm-1.5 O-ring port to a 5/8-18 inverted-flare connection and includes a Viton O-ring for reliable sealing. Ideal when updating an early GM vehicle with a later steering box but continuing to use original-style hose ends.