The performance of thread on a sewing machine. Good sewability means that the thread seldom breaks or skips stitches.

Ability to sew without skipped stitches or having the thread break. Several factors affect sewability, for example, improper needle size, wrong thread size, excessive tension, needle heat, worn or defective sewing machine parts, and improper machine settings. Thread likewise plays a key role in sewability. Factors in thread sewability include elongation, uniformity, ply security, lubrication, strength, and twist construction. (See Thread Construction or Thread Selection Guide, Sewability, Performance, and Appearance.)