The following abbreviations and none other may be employed in the required net quantity declaration:
Inch - in.
Feet or foot - ft.
Fluid - fl.
Liquid - liq.
Ounce - oz.
Gallon - gal.
Pint - pt.
Pound - lb.
Quart - qt.
Square - sq.
Weight - wt.
Yard - yd.
Avoirdupois - avdp.
Cubic - cu.
Periods and plural forms shall be optional. Exponents are permitted.
[80 FR 71689, Nov. 17, 2015]