USA military technical standard for nylon thread
| I | Twisted multiple cord, soft finish |
| II | Twisted multiple cord, bonded finish |
| III | Monocord, bonded finish |
| IV | Hand-sewing twist, waxed finish |
| V | Buttonhole twist, hand-sewing (waxed) |
| VI | Tailoring, twisted multiple cord, soft finish |
| VII | Quilting thread, coreless cocoon bobbins and top thread, twisted multiple cord, soft finish |
| Class A | General Purpose | |
| Class B | Nonwicking | Type I Only |