Abstract: A retainer for releasably locking the male and female component of a quick connector together. The retainer is releasably insertable into a transverse bore formed in the female component and includes a recess engageable with a radial flange on the male component only when the male component is fully coupled in an axial bore in the female component. The engagement of the recess and the radial flange on the male component permits full insertion of the retainer into the transverse bore in the female component around the male component to lock the male component and female component together. The female component has opposed interior surfaces spaced sufficiently apart to permit the deflectable legs formed on the retainer to flex apart while being slidingly urged over the male component to snap over the male component. The opposed surfaces block full insertion of the retainer into the female component when the male component is not fully seated in the female component.