I just recieved a set of monkey nut for my 1985 K100 from a aftermarket vendor that I have used before. The nuts will only go into the driven pockets with considerable force and there is no room for the driving tangs. I have not tried lubrication with a lot of force. I just doesn't seem wise. I have checked with another aftermarket that says "Bosch OEM replacement" They have a very good picture that looks like what I recieved. The surviving nuts that I took out are smaller and have a difiernt shape. I have done this job before. Has something changed?