The BOBBIN (Part #40118004) is a genuine JACK original replacement part designed for JACK JK-T1900, T1900B, T1900H bar tack / button sewing JUKI Models: LK-232 and LK-237 series button sewing machines. Manufactured to OEM specifications for precise fit and reliable performance. Equivalent Part Numbers JACK: 40118004 Compatible: 10079A (alt) Compatible Machines This part fits the following industrial sewing machine models: JACK: JK-T1900, T1900B, T1900H bar tack / button sewing JUKI Models: LK-232, LK-237, LK-239, LK-280, LK-282, LK-283, LK-284, LK-287, LK-289, LK-291, LK-322.LK-980, LK-981, LK-982, JK-T1900B, JK-T1906GS-D, JK-T1900GSK-D, JK-T1906GP-D JUKI: LK-987, LK-992, LK-1850, LK-1900, LK-1900A, LK-1900B Technical Specifications Brand JACK Part Number 40118004 Part Type Bobbins Condition New – OEM Original Looking for a replacement bobbin for your JACK JK-T1900 or T1900B button 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.