This is the vintage original stop motion bushing clamp (handwheel collar) for the Singer Featherweight 221, 221K, 221J, 222K and Tan. The screw is included.
Be sure to look under our tutorial tab if you need help removing the handwheel collar bushing.
If you need one for a White Featherweight please contact us at the shop, as there are two different kinds that fit White Featherweights, and they need to be measured to get the right part.