Add bold navy stitch lines with #1645 for a strong, classic finish on heavy fabrics.
Enjoy controlled handling from glazed cotton that helps stitches lay neatly and consistently.
Use Tex 40 thread size for versatile everyday sewing, repairs, and craft projects.
Stock up with 1000 yards on a durable wood spool for repeat projects and small runs.
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Drive bold, heavy-duty stitching through thick materials with New Bedford Thread Company TX500 (8/7) Cotton Navy #1645 Glazed in Tex 500. Deep navy color adds a strong, classic look that pairs well with dark canvas, denim, utility fabrics, and nautical or workwear-inspired projects. Extra-thick cotton thread creates highly visible seams and pronounced stitch lines, making it a strong choice when stitching needs to stand out and hold its shape across rugged builds. Glazed cotton adds a controlled feel that helps manage thicker thread during demanding work, supporting steadier pulls and cleaner-looking stitches.
Expect rugged specs designed for heavy thread applications. Navy #1645 thread is cotton and features a glazed finish that gives a firmer surface for smoother pull-through and reduced snagging in many applications. Thread size is Tex 500 with an 8/7 construction, built for very thick, highly visible stitching on heavy materials. Packaging includes a 16 oz spool with 480 yards, offering a practical amount for specialty work, bold topstitching, and targeted production needs where thick thread is used in shorter runs. Compatibility depends on equipment: Tex 500 is extremely heavy and typically requires an industrial or heavy-duty machine capable of handling thick thread and larger needles. Testing on scrap material is strongly recommended to confirm needle size, tension, and stitch quality before starting a full project.
Put this glazed cotton thread to work on heavy canvas builds, utility sewing, gear-style bags, reinforcement seams, edging, and decorative topstitch details where a navy stitch line adds depth and definition. Slower sewing speed, careful tension adjustment, and proper fabric support can help reduce skipped stitches and uneven pull with very thick thread. Avoid using for load-bearing or safety-critical applications such as climbing, lifting, towing, or restraint uses. Best results come from keeping the thread path clean, avoiding sharp, tight turns that stress thick thread, and storing the spool in a dry place away from excess heat or humidity.
