Steel adapter designed to allow early-style power-steering hoses with 5/8-18 inverted-flare ends to be used on late-model GM power-steering boxes. Made in the USA and zinc-plated, this fitting converts a 16mm-1.5 O-ring port to a 5/8-18 female inverted-flare connection and includes a Viton O-ring for dependable sealing. Ideal for retrofitting later GM steering boxes into older vehicles while retaining OE-style hose ends.