Revitalize your vintage Singer sewing machine with the Lower Horizontal Shaft Gear Part# 163996! Perfectly compatible with models 401, 403, 404, 411, 431, 500, 503, 600, 603, 604, 609, 620, 625, 626, 628, 629, 630, 630E, 631, 635, 635E, 636, 638, 639, 640, 640E, 640E3, 645, 645E3, 645E6, 645E7, 646, 646E3, 646E6, 646E7, 648, 648E, 648E3, 648E6, 648E7, 649, 649E3, 649E6, 649E7. Ensure smooth, precise stitching and keep your creativity flowing! ==== FEATURES: ==== (A) **Precision Engineering for Seamless Performance**: The GEAR LOWER RIGHT HORIZONTAL #163996 is meticulously crafted to ensure flawless compatibility with your Singer 600 Series sewing machine. This high-quality, non-OEM replacement gear guarantees smooth and efficient operation, allowing you to focus on your creative projects without any mechanical hiccups.

(B) **Durability Meets Reliability**: Made from premium materials, this lower horizontal shaft gear is designed to withstand the rigors of continuous use. Its robust construction ensures long-lasting durability, providing you with a reliable component that keeps your sewing machine running like new, project after project.

(C) **Versatile Compatibility**: This gear is a perfect fit for a wide range of Singer models, including 401, 403, 404, 411, 431, 500, 503, 600, 603, 604, 609, 620, 625, 626, 628, 629, 630, 630E, 631, 635, 635E, 636, 638, 639, 640, 640E, 640E3, 645, 645E3, 645E6, 645E7, 646, 646E3, 646E6, 646E7, 648, 648E, 648E3, 648E6, 648E7, 649, 649E3, 649E6, and 649E7. Whether you're a hobbyist or a professional, this gear ensures your machine operates at peak performance across various models.