A conveyor construction including a frame having a pair of side rails with each side rail having a longitudinal T-shaped slot. A plurality of cross members are connected between the side rails and support a bed plate. An endless belt rides on the bed plate and is trained over an adjustable spindle assembly which is located at an end of the conveyor. The spindle assembly includes a spindle journalled between a pair of side members that are mounted for sliding movement in the T-slots of the respective side rails. A ratchet and pinion mechanism interconnects the conveyor frame with the spindle assembly and acts to move the spindle assembly longitudinally of the frame to tension the belt. A belt tracking mechanism is associated with each side of the spindle assembly and includes a cam member which is engaged with the respective side member of the spindle assembly. Individual rotation of the cam members serve to properly track the belt on the bed plate. To attach components to the conveyor frame, spring loaded nuts are slidably mounted in the T-slots of the side rails and the components are attached to the spring loaded nuts.