Join Date: Nov 2003
Location: Port Elizabeth, South Africa
EN8 steel, not hardened, but neither were the originals - the end of the driveshaft has a soft brass bush in it, so the pawl doesn't need to be harder than it is. They can be hardened if required.
Not sure why you would want the original, it has a flat spot on the round end which must have happened when the Guibo started to break down and the nut end was pressed up against the inside of the driveline bush plus the nut section has a few light scars from spanners, the reproduction ones are better as the end is round and true.
The engineering works yellow passivated them - they were originally cadmium plated, but this process is getting harder to find due to environmental issues. the original had light rust on the surface, it's under the car, deep inside the gearbox yoke and is covered by the Guibo or donut. I can spray one to replicate the original.