Vintage Singer 221 Featherweight sewing machine bobbin winder screw, this is the chrome version used on earlier Featherweights from the 30s & early 40s (but can be used on later models & 222k's for a nice upgrade). You are purchasing one screw with both the flat & cupped washer included. Very nice vintage condition, bright & rust free. Original, genuine Simanco part #51355. *Please note that this screw will NOT replace the extension bed screw.