Flexible coupler, 5mm to 6.35mm (1/4")

A flexible coupler with a 5 mm bore on one side and 6.35 mm (0.25 in) on the other side.

Usually, flexible couplers have either a set screw, or a slit that forms two jaws that can be tightened with a screw.  This coupler has both, which is an advantage.  Using both mechanisms to tighten it helps keep it centered, especially when the object it tightens around is slightly smaller than the nominal diameter.

Overall dimensions: length 25 mm, diameter 20 mm (jaw tightening screws protrude slightly).

Material: aluminium alloy, steel.

Part numbers: EM-FC5-6.