This Replica 3-Prong Terminal Receptacle includes the three post thumb nuts for the backside. The originals are often cracked or chipped as Featherweight machines were placed in their cases. The terminal would get caught on the right side of the case causing it to break.
This part will not work on a Singer 222K unless your 222K Featherweight has been converted to accommodate the round 3-hole plug. If your terminal has flat prongs rather than round, then e-mail us for availability.