Singer Simanco Thread Tension Assembly 45763 Vintage Sewing Machine Part USA Simanco thread tension assembly for vintage sewing machines, featuring the complete mechanical stack with springs and adjustment knobs. This genuine replacement part includes the tension discs, beehive spring, and mounting hardware necessary for restoring proper stitch quality. The metal components show a classic polished finish with stamped identification marks, ensuring compatibility with period-correct equipment. Measurements: • Length: 2" • Tension Disc Diameter: 1" Please look carefully at the pictures to determine if the physical condition meets your expectations before purchasing. I will not respond to any offers given through direct messages. I will only accept payment through the official payment method. I will only ship to the address the buyer has on file. #Vintage