Flat Bobbin Case Tension Spring – 040-56348963
The Flat Bobbin Case Tension Spring (04056348963) is a precision formed bobbin case component designed to providecritical lower thread tension control in sewing machines. As a flat, forked tension spring, this part applies measured resistance to the bobbin thread as it unwraps from the bobbin, helping produce balanced, quality stitches and reducing thread slack during operation.
Compatible with Juki Sewing Machine Models:LU-563
Alternate Part Numbers:04056348963
No products in the cart.