![Amazon.com: ID: PFW-66774, 125314. New Generic Replacement Sewing Machine Upper Thread Tension Springs, Compatible with, not Manufactured by Singer. Will fit Models: 201 301 401 403 500 600 603, Others as Below Amazon.com: ID: PFW-66774, 125314. New Generic Replacement Sewing Machine Upper Thread Tension Springs, Compatible with, not Manufactured by Singer. Will fit Models: 201 301 401 403 500 600 603, Others as Below](https://m.media-amazon.com/images/I/51yLZX4UMVL.jpg)
Amazon.com: ID: PFW-66774, 125314. New Generic Replacement Sewing Machine Upper Thread Tension Springs, Compatible with, not Manufactured by Singer. Will fit Models: 201 301 401 403 500 600 603, Others as Below
![Troubleshooting serger tension issues (4-thread) Brother 1034d 1634 or 3034d | Serger sewing projects, Sewing machine tension, Serger stitches Troubleshooting serger tension issues (4-thread) Brother 1034d 1634 or 3034d | Serger sewing projects, Sewing machine tension, Serger stitches](https://i.pinimg.com/originals/6f/30/00/6f3000c9eef6c944e3ba08558cd30322.jpg)
Troubleshooting serger tension issues (4-thread) Brother 1034d 1634 or 3034d | Serger sewing projects, Sewing machine tension, Serger stitches
![Amazon.com: 2Pcs Tension Check Spring for Domestic Sewing Machine Quilting Thread House Home All Series Models Handmade Craft Steel : Arts, Crafts & Sewing Amazon.com: 2Pcs Tension Check Spring for Domestic Sewing Machine Quilting Thread House Home All Series Models Handmade Craft Steel : Arts, Crafts & Sewing](https://m.media-amazon.com/images/I/71Gbe5ce+gL.jpg)
Amazon.com: 2Pcs Tension Check Spring for Domestic Sewing Machine Quilting Thread House Home All Series Models Handmade Craft Steel : Arts, Crafts & Sewing
![at a loss... bottom of stitch becomes a total mess, was working before, no tension setting works now : r/sewing at a loss... bottom of stitch becomes a total mess, was working before, no tension setting works now : r/sewing](https://preview.redd.it/at-a-loss-bottom-of-stitch-becomes-a-total-mess-was-working-v0-8d7f1ec8fqca1.jpg?width=640&crop=smart&auto=webp&s=0a8628c59612fe45fde0e663d998aaf07e1f04c1)