Bag stitching thread is a type of thread specifically designed for sewing bags, sacks,and other heavy-duty fabrics. It is typically made of synthetic fibers, such as polyester or nylon, to provide superior strength and durability.Bag stitching thread comes in various thicknesses or weights, ranging from lightweight to heavy-duty, depending on the type of fabric and the intended use of the bag. The most common thicknesses used for bag stitching thread are 20/6, 12/4, and 10/3, with the first number indicating the thickness of the thread and the second number representing the number of plies or strands of thread.Bag stitching thread is also available in different colors, but most commonly used colors are white, beige, and black to match the color of the fabric used for the bag.When stitching bags, it is important to use the appropriate thread thickness and to adjust the tension on the sewing machine accordingly. Proper tension ensures that the stitches are even and that the thread does not break or snap during sewing.Overall, bag stitching thread is a reliable and sturdy thread choice for heavy-duty fabrics, providing strength, durability, and resistance to abrasion and wear.