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Thumbnail Filmstrip of Shaft Boss - Stop for 3/8" Shafts- Useful to take Images
Not Couplers
Made to be a shaft boss to stop shaft end play
You can use an o ring, and push this up against it to take up the up and down wear on 3/8" Shafts
These are not couplers.
They are to keep a 3/8" shaft from moving.
Typically used on each side of a heim joint to keep shaft in place.