Singer Sewing Machine Tension Thumb Nut 51682 Vintage Replacement Part Chrome Singer Sewing Machine Tension Thumb Nut 51682 provides a reliable replacement part for vintage sewing machine maintenance. This chrome-finished metal nut features a knurled edge for easy gripping and manual adjustment, ensuring precise thread tension control during operation. The threaded interior and integrated guide pin are designed for compatibility with specific vintage Singer models. Measurements: • Diameter: 0.5" • Height: 0.25" 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