Key Differences & Characteristics:
TKT-20: A thicker, heavy-duty thread designed for high-stress applications such as denim, leather goods, heavy canvas, and structural upholstery stitching. TKT-20, the construction typically ranges around 600 to 650 denier with a 3-ply structure.
TKT-40: A standard medium-heavy industrial thread widely used in apparel manufacturing, shirts, trousers, and general textile stitching requiring a fine yet strong finish. TKT-40, a standard 210/3 denier construction (three 210-denier plies) is commonly used.