Genuine Tension Thumb Nut 20225 for Seiko LSW-6LG, 6LG-T, 6LG-TA, 7LG, 7LG-T, 7LG-TA Sewing Machine
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Genuine Seiko Tension Thumb Nut (Part #20225)
Achieve precise, repeatable thread control with the Genuine Seiko Tension Thumb Nut (Part #20225). This authentic adjustment component is the primary interface for fine-tuning the upper thread tension on the Seiko LSW long-arm industrial series.
The tension thumb nut is responsible for applying calibrated pressure to the tension spring and discs. In heavy-duty sewing—such as automotive upholstery, sails, or heavy webbing—even a half-turn can be the difference between a perfect lockstitch and a loose seam. This genuine Seiko part features a knurled grip and precision-cut internal threads designed to hold its position under the high-vibration environment of 2,500+ SPM (stitches per minute) operation.
✔ Free shipping on orders over $99
✔ Ships from our USA (Georgia) office when in stock
✔ Weekly restocking from Japan, China, Bangladesh, and Turkey warehouses
✔ 3–7 business days handling time
✔ Compatible with multiple industrial sewing machines
✔ Carefully inspected before shipment
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