Bonded nylon thread is made from nylon filaments that are twisted together and coated with a resin “bond.” That bond helps the plies stay together so the thread feeds smoothly and resists fraying during sewing.

• Smoother feeding: The coating reduces lint and snarls, especially at higher speeds.
• Durability: Good abrasion resistance for tough materials like leather, vinyl, canvas, and denim.
• Neat finish: Less unraveling at the cut ends can support cleaner seams.

You’ll often see sizes listed as Tex (e.g., Tex 70) or numbers (e.g., #69) along with yardage. Choose a size compatible with your machine and needle, and test on scraps. On Walmart.com, you can compare sizes and colors and select pickup or delivery options where available.

Both are strong, but they behave differently. The better choice depends on your project and conditions.

• Strength & stretch: Bonded nylon often offers high tensile strength with a bit more stretch, which can absorb shock in items like bags or leather goods.
• Weather & UV: Polyester typically handles prolonged sunlight and moisture exposure better, which many prefer for awnings or outdoor covers.
• Sewing feel: The bond on nylon helps it glide through thick materials with fewer frays.
• Look & compatibility: Heavier sizes are more visible and may require larger needles and tension adjustments.

For indoor upholstery or leather, bonded nylon is a common pick; for constant sun exposure, polyester is often considered. Always test with your machine and materials.

Leather and vinyl can be dense and abrasive, so many crafters choose bonded nylon for its handling and durability.

• Smoother stitch formation: The bonded coating helps the thread pass cleanly through tough layers.
• Strong, durable seams: Nylon’s strength and abrasion resistance suit straps, bags, upholstery, and wallets.
• Slight give: A bit of stretch can help seams tolerate flex and stress.

For setup, a leather or denim needle and a moderate stitch length can reduce perforation in leather. Start with a midweight size (such as Tex 70/#69) and adjust based on thickness and desired look. Results vary by machine and material, so test on scraps before committing to your project.

Many home machines can sew bonded nylon within reasonable sizes, with a few adjustments.

1. Pick a manageable size: Start around Tex 45–70 so feeding and tension remain easier.
2. Use the right needle: A fresh denim/topstitch (size 16/100–18/110) or leather needle can help form consistent stitches.
3. Lengthen stitches: Try 3–4 mm to reduce friction and needle heat on dense materials.
4. Tune tension & speed: Sew a bit slower and test both top and bobbin tension on scraps.
5. Match thread thoughtfully: Use similar weight top and bobbin threads, or a slightly lighter bobbin if your machine prefers it.

If the machine struggles with heavier threads or materials, an industrial machine may be more suitable. Always consult your manual.

These labels indicate thread thickness. Tex measures grams per 1,000 meters of thread—higher Tex means thicker thread. The # number is another common shorthand.

• Common equivalents: #46 ≈ Tex 45, #69 ≈ Tex 70, #92 ≈ Tex 90, #138 ≈ Tex 135.
• Other labels: You may see 210D/3, which means three plies of 210-denier nylon filaments.
• Choosing a size: Lighter sizes suit garments or light canvas; #69/Tex 70 is popular for general upholstery and leather goods; #92+ is used when a heavier, more visible stitch is desired.

Heavier threads usually need larger needles and tension adjustments. Check your machine’s guidance and test before starting. You can filter by size and yardage on Walmart.com.