a weldless aluminum pallet has slats that interlock with outside and inside stringers to form the pallet without need for permanent attachment points . grooves in the stringers receive a projection on each slat , holding the slat in place . preferably , a single projection extends along the length of the slat body . the projection is shaped to cooperate with the groove such that the slat attaches perpendicularly to the stringers . the groove is shaped to retain the slat &# 39 ; s projection by friction fit , creating an interlocking joint . the front and rear slats on each face may be fastened to the stringers by screws or other removable fasteners . pure aluminum or an aluminum alloy may be used , and the material may be tempered using known tempering techniques . the preferred material is 100 % recycled 6005 - t6 aluminum alloy . the parts are preferably extruded but alternatively may be molded or otherwise die cast .