I would think that they are interchangable. FZ256/3 lists both for any control box as:
grommets, sleeve #2, OR
protectors, cable, 1 11/16" L AND washers, steel, extruded 13/16" OD, 13/32 ID, 0.1" Deep.
This tells me the same box can use either. I have both types but I don't know what came first.
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