a fitting assembly adapted for securing an elongate member to a bracket having an open - ended slot into which the fitting assembly is received . the fitting assembly includes a first fitting member adapted for attachment to the elongate member and having an axis and a second fitting member adapted for receipt into the open end of the slot and fixed engagement with the bracket through relative movement between the second fitting member and the bracket solely in a direction substantially lateral to the axis . the first and second fitting members are connected together and have first and second positions relative to each other in a direction substantially lateral to the axis and are constrained against relative movement substantially along the axis . the first and second fitting members are substantially immovable relative to each other in a direction substantially lateral to the axis in the second position .