Genuine Thread Tension Spring - Yellow (Part #131-38508). This color-coded OEM spring is specifically calibrated to provide the light-to-medium tension range required for specific thread paths on Juki MO-series machines.

Key Features & Benefits
100% Genuine Juki Quality: Manufactured to exact factory tension specifications. Unlike generic springs, this OEM part maintains its calibrated resistance even under the heat of 7,000+ SPM production.

Color-Coded (Yellow): The yellow marking identifies this as a specialized tension spring, typically used for the Upper Looper or Chainstitch Looper paths where a lighter, more sensitive tension is required for soft stitch formation.

Sensitive Tension Control: Engineered to provide a smooth, linear tension curve, allowing for micro-adjustments that remain stable throughout long production shifts.

✔ 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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⚠️ Please confirm your machine model before ordering