207(Tex 210) Heavy Weight Bonded Nylon/Poly Leather/Canvas/Awning Thread | eBay
Amazon.com: All Purpose Extra Strong Heavy Duty Bonded White Sewing Thread Great for Quilting,Upholstery, Leather, Denim, Marine, Outdoor and Camping Products. T70#69 210D/3PLY 1400 Yards. : Arts, Crafts & Sewing
Best Heavy-Duty Threads for Strong and Smooth Stitches
Tex 80 Polyester Bronze Light Brown Heavy Weight Sewing Thread for Industrial Sewing Machines, Sewing Accessories - Etsy
Size #277 Bonded Polyester Upholstery Thread for Heavy-weight Sewing
Machine Embroidery: The Ideal Guide to Pick Thread Weights
Amazon.com: All Purpose Extra Strong Heavy Duty Bonded Black Sewing Thread Great for Quilting,Upholstery, Leather, Denim, Marine, Outdoor and Camping Products. T70#69 210D/3PLY 1400 Yards. : Arts, Crafts & Sewing