Add heavy-duty, bold seams with Eddington Thread Strong Bonded Nylon Thread in Tex 400. Black delivers a deep, true black that blends seamlessly with dark webbing, leather, and heavy fabrics or creates striking contrast on light materials, keeping stitch lines consistent and sharp on thick, demanding projects. Bonded nylon construction delivers reliable sewing where maximum tensile strength and steady performance matter on dense layers, heavy webbing, and rugged materials. This Type II, Class A Topthread is Berry Compliant, made in the USA in accordance with the Berry Amendment.
Rely on clear specs for efficient setup. This bonded nylon Topthread is Tex 400 (T-400), also designated Size 6, offering an extra-heavy-weight profile for bold, durable stitching on thick webbing, leather, and multiple layers of heavy material. Packaging includes a 16 oz spool, providing a substantial supply for larger runs, repairs, and project batches. Compatible with heavy-duty industrial machines built for very thick thread, such as walking-foot and leather-stitching machines, and it also works well for hand stitching; standard home machines aren't suited to this weight. Test on scrap material to dial in needle size, tension, and stitch length.
Put this bonded nylon to work on heavy webbing, leatherwork, saddlery, tactical gear, heavy bags, and rugged outdoor equipment where black stitching delivers a bold, finished look. Avoid using thread for load-bearing or safety-critical applications, such as climbing, lifting, towing, or restraint. For best results, use steady speed, correct tension, and a clean thread path to reduce friction and skipped stitches.