No Back-Lash Spring

Guaranteed to fit Alphasew Sewing Machine Models:
P20U33-3

Guaranteed to fit Brother Sewing Machine Models:
TZ1-B652, XL2005, XL4001, XL5001, XL622, XL702, XL703

Guaranteed to fit Riccar Sewing Machine Models:
2600, 2800, 2900, 2950 3300, 3400, 3500, 3600, 4001, 4003, 414, 500, 515, 555FA, 572, 606, 616FA, 666FA, 805, 806, 807, 808E, 8400, 8500, 888, 906e, 9150, 9160, 9600, 9700, 9800, 9900, R750, RE571 RE581, RE591, RM570

Guaranteed to fit Singer Sewing Machine Models:
20U, 20U11, 20U12, 20U13, 20U31, 20U33

Guaranteed to fit White Sewing Machine Models:
305, 4000, 510, 5500, 690, 710

Alternate Part Numbers: 117596-0-01, 541678, H12805000