A combination of a cross member and a bracket for mounting an item to said cross member, said bracket comprising: a base defining an opening for receiving said item; an arm movably mounted on said base, said arm being movable between an open position wherein said arm is not overlying said opening and thereby allowing access thereto, and a closed position wherein said arm overlies said opening to capture said item between said arm and said base; wherein said base comprises: first and second sidewalls (66, 68) arranged in spaced apart relation from one another; a back wall extending between said first and second sidewalls(66, 68), said back wall and said first and second sidewalls (66, 68) forming a channel, a first portion of said channel having a first width measured between said first and second sidewalls (66, 68) at a point proximate said back wall, said first width being sized so that said first portion of said channel receives said cross member in engagement sufficient to prevent rotation of said bracket about a longitudinal axis of said cross member, a second portion of said channel having a second width measured between said first and second sidewalls (66, 68) at a point distal to said back wall, said second width being sized to permit rotation of said bracket about said longitudinal axis when said cross member is positioned within said second portion of said channel. a base defining an opening for receiving said item; an arm movably mounted on said base, said arm being movable between an open position wherein said arm is not overlying said opening and thereby allowing access thereto, and a closed position wherein said arm overlies said opening to capture said item between said arm and said base; wherein said base comprises: first and second sidewalls (66, 68) arranged in spaced apart relation from one another; a back wall extending between said first and second sidewalls(66, 68), said back wall and said first and second sidewalls (66, 68) forming a channel, a first portion of said channel having a first width measured between said first and second sidewalls (66, 68) at a point proximate said back wall, said first width being sized so that said first portion of said channel receives said cross member in engagement sufficient to prevent rotation of said bracket about a longitudinal axis of said cross member, a second portion of said channel having a second width measured between said first and second sidewalls (66, 68) at a point distal to said back wall, said second width being sized to permit rotation of said bracket about said longitudinal axis when said cross member is positioned within said second portion of said channel. first and second sidewalls (66, 68) arranged in spaced apart relation from one another; a back wall extending between said first and second sidewalls(66, 68), said back wall and said first and second sidewalls (66, 68) forming a channel, a first portion of said channel having a first width measured between said first and second sidewalls (66, 68) at a point proximate said back wall, said first width being sized so that said first portion of said channel receives said cross member in engagement sufficient to prevent rotation of said bracket about a longitudinal axis of said cross member, a second portion of said channel having a second width measured between said first and second sidewalls (66, 68) at a point distal to said back wall, said second width being sized to permit rotation of said bracket about said longitudinal axis when said cross member is positioned within said second portion of said channel.