41 B 12 Tooth 20MM ID, with 6mm Keyway and two set screws.
Be sure and order the 6 mm x 6 mm x 20 mm long with Rounded ends, Metric Sq. Key. #4304
Used with some electric motors / 20mm OD shafts / axle. 20mm ID.
Product ID: 3019
Product ID: 0167
Product ID: 4170
Product ID: 0131
Product ID: 4174
Product ID: 0137