HS Code 55.08 – Sewing thread of man-made staple fibres, whether or not put up for retail sale

HS code 5508 is a 4-digit heading in the Harmonized System that covers: Sewing thread of man-made staple fibres, whether or not put up for retail sale. HS Code 5508 covers 'Sewing thread of man-made staple fibres, whether or not put up for retail sale.' This heading specifically targets threads designed and used for stitching, made from short, spun man-made fibres. The term 'man-made staple fibres' encompasses both artificial (regenerated cellulose like viscose, modal) and synthetic (polyester, nylon, acrylic) fibres, provided they are in staple form, meaning they are short fibres spun into a continuous thread. This distinguishes them from threads made of continuous filaments (e.g., in Chapter 54). The scope is broad regarding the type of man-made staple fibre but narrow in its application: it must be identifiable as 'sewing thread.' This implies specific characteristics like strength, twist, and finish suitable for machine or hand sewing. The crucial phrase 'whether or not put up for retail sale' means the classification remains the same regardless of packaging – whether it's large industrial cones for garment factories or small spools for home use. This ensures consistent classification for a product with identical end-use. For trade compliance, correctly identifying a product as 'sewing thread' is paramount, as other 'yarns' (even of similar composition) fall under different headings (e.g., 5509, 5510, 5511). This distinction can significantly impact tariffs, import duties, and trade regulations, especially for countries with robust textile and apparel industries. Sewing thread is an indispensable component in global garment and textile manufacturing, and its precise classification is vital for efficient supply chain management. This heading is a specific subset within Chapter 55, emphasizing the specialized function of the thread.

Polyester staple fibre sewing thread (industrial cones), Acrylic staple fibre sewing thread (retail spools), Viscose rayon staple fibre sewing thread, Nylon staple fibre sewing thread (high-tenacity), Modal staple fibre sewing thread, Blended man-made staple fibre sewing thread, Recycled polyester staple fibre sewing thread, Embroidery thread of man-made staple fibres, Quilting thread of man-made staple fibres, Serger thread of man-made staple fibres, Buttonhole thread of man-made staple fibres, Denim sewing thread (heavy duty), Upholstery sewing thread (man-made staple), Shoe manufacturing sewing thread (man-made staple), Professional garment sewing thread, Household sewing thread assortments, Multi-purpose sewing thread (staple fibre), Specialty sewing thread for leather (staple fibre), Decorative sewing thread (staple fibre), Yarn for mending (man-made staple, sewing), Industrial overlock thread (man-made staple), Bonded polyester staple sewing thread, Core-spun sewing thread (man-made staple), Water-soluble sewing thread (man-made staple), Fire-retardant sewing thread (man-made staple).

A common misclassification for HS 5508 is confusing it with sewing thread of synthetic *filaments* (HS 5401), where the key distinction is 'staple fibres' versus 'filaments.' Another frequent error is misclassifying general 'yarns' of man-made staple fibres (HS 5509, 5510, 5511) as sewing thread. The critical difference lies in the specific characteristics and intended use of 'sewing thread' – designed for stitching, possessing particular strength, twist, and finish. Lastly, sewing thread of natural fibres, such as cotton (HS 5207), is sometimes mistakenly grouped here, ignoring the 'man-made' requirement. Careful attention to fibre type and specific function is essential.

In 2025, the top exporters of HS code 5508 in UN Comtrade data were China ($404M, 65% of world exports), Türkiye ($21M) and Egypt ($21M). World exports came to about $624M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

In 2025, the top importers of HS code 5508 in UN Comtrade data were Vietnam (about $41M, 8.2% of world imports), Cambodia (about $27M) and Bangladesh (about $25M). World imports came to about $502M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

HS code 5508 is a 4-digit heading under Chapter 55 of the Harmonized System. The first 2 digits (55) identify the chapter, and digits 3-4 (08) specify the heading. This code contains multiple 6-digit subheadings for precise product classification.