The LOOPER (Part #20717050) is a genuine JACK original replacement part designed for JACK JK-798 C5 B5 series overlock, 798T, E4 and E4S series overlock machines. Manufactured to OEM specifications for precise fit and reliable performance. Equivalent Part Numbers JACK: 20717050 Compatible Machines This part fits the following industrial sewing machine models: JACK: JK-798 C5 B5 series overlock, 798T, E4, E4S, C3, C4, C5 series (Except H, M, A04, 435 model) Technical Specifications Brand JACK Part Number 20717050 Part Type Loopers Condition New – OEM Original Looking for a replacement looper for your JACK JK-798 C5 B5 series overlock or 798T overlock 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.
