and of the dimensions required to
produce the desired specimen size. The inside surfaces of the
molds shall be smooth and free from indentations. The sides,
bottom, and ends shall be at right angles to each other and shall
be straight and true and free of warpage. Maximum variation
from the nominal cross section shall not exceed 1⁄8 in. [3 mm]
for molds with depth or breadth of 6 in. [150 mm] or more, or
1⁄16 in. [2 mm] for molds of smaller depth or breadth. Except
for flexure specimens, molds shall not vary from the nominal
length by more than 1⁄16 in. [2 mm]. Flexure molds shall not be
shorter than 1⁄16 in. [2 mm] of the required length, but may
exceed it by more than that amount