Thread chain
A flexible, hand-crocheted loop of thread used to loosely connect the lining hem to the outer coat hem.
Where it is used
Closing Opening and Thread Chain
p. 46- Turn the coat right side out and close the remaining opening by hand stitching. Sew the facing to the hem allowance using a thread chain. Create a loose loop with a second thread, then secure it with knots all along the length.

Related terms
requiresHand sewing needles