Section 164.023-15 - Marking(a)General. The manufacturer must ensure that each shipping label, and each spool or individual unit of put-up, is permanently and clearly marked in a color which contrasts with the color of the surface on which the marking is applied. Each label must be marked with-(1) The manufacturer's or supplier's name, trade name, or symbol;(2) The unique style, part, or model number of the thread;(3) The size of the thread;(4) The composition of the thread; and(5) The lot number of the thread.(b)Non-standard thread. In addition to the markings specified in paragraph (a) of this section, each unit of put-up of non-standard thread must be marked with the appropriate recognized laboratory's certification marking(s).