Abstract: A vehicle article carrier having a pair of slats, at least one cross bar and a pair of bracket members secured to the cross bar for adjustably positioning the cross bar along the slats. Each of the bracket members includes a housing having a camming portion and an actuating member which may be rotated between locked and unlocked positions. The actuating member includes a securing post which is attached to a flexible locking plate. When in the locked position, portions of the locking plate engage with the slat to clamp the bracket member to the slat while the securing post extends into an aperture in the slat to positively prevent movement of the bracket member along the slat. Moving the actuating member to its unlocked position causes the locking plate to be flexed to cause the portions which were previously in clamping engagement with the slat are urged out of clamping engagement generally simultaneously with lifting of the securing post out of the aperture in the slat.