The Bobbin Spring (Part #12918022) is a genuine JACK original replacement part designed for JACK industrial sewing machines. Manufactured to OEM specifications for precise fit and reliable performance. Equivalent Part Numbers JACK: 12918022 Technical Specifications Brand JACK Part Number 12918022 Part Type Springs Condition New – OEM Original Looking for a replacement bobbin spring for your JACK industrial sewing machine? This genuine OEM part ensures reliable performance and precise fit. 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.
