Replacement O-Rings for most 10-32 threaded fittings. Enlarge Replacement_O-Rings_-_Medium × CAD Model Download CAD File × Step File Download IGS File Download Add to Parts List Message Overview The OR-516-40 Replacement O-Ring is used on a wide variety of Beswick 10-32 and M5 male threaded fittings. Add to Parts List × Create New Parts List