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.Note:

Periods and plural forms shall be optional. Exponents are permitted.

[80 FR 71689, Nov. 17, 2015]