The Excalibur 300M U-joint for your Dana 60 or Ford Super Duty front axle is 100% American made. The cross is made from heat treated billet 300M and the caps are 4340. The entire u-joint unit is heat treated and cryod for ulitmate strength and wear resistance. The Nitro Exclaibur u-joint Joint comes with full circle clips and grease fittings that install into the caps. There are no needle bearings in these u-joints. This allows the legs for the caps to be thicker.

These Nitro 300M u-joints are for off-road use only and should be greased often if driven at highspeed. It is the strongest u-joint on the market. These joints are backed by Nitro Gear & Axle with a no questions asked Lifetime Warranty. The trick is you have to break them. We do not have an exact torsional breaking load do to the fact that there is not a shaft on the market that will hold and break the Nitro Excalibur u-joint first. We are working on a fixture to break these (No easy task). Rest assurred these will outlive any shaft on the market and your u-joint will not be the weak link.