Part Number: JK3051. A NEW ERA HAS BEGUN WITH THE ARRIVAL OF THE APEX TRUSS! Artec Industries is proud to announce the next generation of PATENT PENDING axle trusses. The key feature that sets the APEX truss apart is its unique peaked shape top which provides extra rigidity to the whole truss while allowing both a reduction in weight (vs using a thicker material top) and eliminating long weld seams.