track rod tie rod steering ends

[Bob Culver]

Seeing the topic has more or less been raised, chrome plating is reckoned to have a deleterious to very deleterious effect on fatigue life, so best avoided for steering arms and the like in high use cars.
Many track rod ends are expanded. Can still use by making oversize pins. Old valve stems promising.
What does grese nipple on the tubular axle serve? Do the radius rods meet in the usual place?