3M™ Nextel™ Sewing Thread 312 is a machine sewable thread comprised of 312 Grade rovings and rayon serving which enhances sewability. Available in two diameters for different strengths, Sewing Thread 312 is designed to withstand continuous use temperatures of up to 2200oF (1204oC). Ideal for sewing Nextel™fabric in high temperature insulation applications. Available heat cleaned and sized.
3M™ Nextel™ Sewing Thread 312, Style AT-21 is a high-temperature machine sewable thread made from strong, continuous alumina-boria-silica fibers (about 90%) and rayon (about 10%), which is added for resiliency, abrasion resistance, and improved sewability. For use with 3M™ Nextel™ Fabrics 312.