Belting Glossary All | # A B C D E F G H I J K L M N O P Q R S T U V W X Y Z There are currently 3 names in this directory beginning with the letter Y.Yarn numberThe number of hanks in a pound of spun yarn.Yield pointThe stress in a material at which a substantial increase in strain occurs with a minimum increase in stress.Young's modulusStress per unit strain for perfectly elastic material.