Stitch Length Regulator — Fits Singer 401, 403, 404, 500 & more

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Stitch Length Regulator is a replacement part for sewing machines, listed here for the machine models shown below. This component is a spare part for the machine. Replace a worn or damaged part to help restore proper machine operation. Compatible Models Singer 401 Singer 403 Singer 404 Singer 500 Singer 503 Part Number163951 Confirm the part number and machine model before ordering. Show more