The BOBBIN (Part #41718004) is a genuine JACK original replacement part designed for JACK T1310D T2210D T6040D, JK-11310, T2210 and T3020 series industrial sewing machines, as well as Speedway SW 5770A series models. Manufactured to OEM specifications for precise fit and reliable performance. Equivalent Part Numbers JACK: 41718004 Compatible Machines This part fits the following industrial sewing machine models: JACK: T1310D T2210D T6040D, JK-11310, T2210, T3020 SPEEDWAY: SW 5770A Technical Specifications Brand JACK Part Number 41718004 Part Type Bobbins Condition New – OEM Original Looking for a replacement bobbin for your JACK T1310D T2210D T6040D or JK-11310 industrial sewing machine? This genuine OEM part is also compatible with Speedway SW 5770A series machines. Shop with confidence — all parts ship from Miami, FL. ⚠️ Compatibility Notice: Always verify your machine model and subclass number before ordering. Part numbers and compatibility are provided as a reference only. Supra Sewing is not responsible for purchases made without confirming compatibility with your specific machine. All sales on replacement parts are final.