1/4 inch to 5mm Stainless Steel Set Screw Shaft Coupler
These stainless steel shaft couplers allow you to couple two size shafts together. They can be used for connecting motor shafts to drive shafts, or two different-sized shafts. These shaft couplers have a length of 0.75", a outer diameter of 0.42", and couple 3/16" to 3/16" shafts.