Guaranteed to fit Husqvarna Viking Sewing Machine Models:
20, 21, 21E, 1010, 1020, 1030, 2000, 2020, 3010, 3230, 3240, 4020, 4030, 5220, 5230, 5430, 6000, 6010, 6020, 6030, 6170, 6230, 6240, 6260, 6270, 6360, 6370, 6430, 6440, 6460, 6470, 6570, 6690, 70, 90

Alternate Part Numbers: 4011660-01, 4011660