High tensile strength 4340 Chromoly is heat-treated tempered and induction hardened to produce these heavy-duty axles that are up to 40% stronger than stock 1040 axles. The latest splining technology to produce splines that are stronger than traditional cut splines. The shafts are then precision CNC machined and magnaflux inspected for cracks before receiving a slick black anodized finish. This chromoly front axle shaft kit from Alloy USA fits 72-81 Jeep CJ5 76-81 CJ7 & 1981 CJ8 with a Dana 30 front axle.
