Fostex B16 Tension arm cap I have now seen these

I have now seen these in the A3340S for certain

An unusual spare part but there is a chance someone might need this somewhere for a dmaged machine maybe

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Also seen in the A-3340

Fostex B16 Tension arm cap I have now seen theseThis was from the Model B16 but may have been used on later models, in principle on some of the machines there was a steel pin on which was a bottom metal bush that locked onto the pin, then two bearings was slotted through the pin and finally on top there was a cap . Both the cap and the bush have set screws in them to lock them into place, the whole assembly then slides into the tension arm where the pin is tightened up with a screw that holds it