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 arranged in spaced apart relation from one another; a back wall extending between said first and second sidewalls , said back wall and said first and second sidewalls forming a channel , a first portion of said channel having a first width measured between said first and second sidewalls 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 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 arranged in spaced apart relation from one another; a back wall extending between said first and second sidewalls , said back wall and said first and second sidewalls forming a channel , a first portion of said channel having a first width measured between said first and second sidewalls 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 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 arranged in spaced apart relation from one another; a back wall extending between said first and second sidewalls , said back wall and said first and second sidewalls forming a channel , a first portion of said channel having a first width measured between said first and second sidewalls 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 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 . <EOS>