MIL-DTL-46506E
3.6.3 Splits extending through staple or nail holes. Splits in the end of boards caused by the
fastener which do not exceed 3 inches in length are acceptable provided the split does not terminate in the
edge of the board.
3.7 Knots and knotholes.
3.7.1 Knots. In faceboards, sound tight knots or clusters of knots shall be permitted provided the
overall dimension as measured across grain shall not be greater than 1.5 inches nor greater than 1/3 the
width of the board.
3.7.2 Knots in cleats and battens. Sound knots shall be permitted providing the cross-sectional
area of the knot shall not be greater than 1/4 the cross-sectional area of the piece. The distance between
knots shall be greater than 6 inches. No part of any knot shall be closer to an end of the cleats or batten
than 1.25 inches.
3.7.3 Knotholes in faceboards. Knotholes, loose knots, or worm holes greater than 5/8 inch
across the largest dimension shall be cause for rejection. Individual knotholes, loose knots or worm holes,
ranging in size to 5/8 inch in diameter across the largest dimension shall be permitted in faceboards
provided they are spaced not less than 6 inches apart. Small holes less than 1/16 inch in diameter shall be
permitted in any piece provided no concentration of such holes exceeds five in any square inch.
3.7.4 Knotholes in cleats or battens. Knotholes or loose knots shall not be permitted within 1 inch
from either end of a cleat or batten. The diameter of loose knots or knot holes shall not be greater than 1/4
the width or depth of a cleat or batten.
3.8 Wane and divergency. At least one surface of faceboard, for example the surface to be placed
on the outside of the container, shall be sufficiently smooth and free of stain to permit legible marking.
3.8.1 Wane. Wane shall not be greater than 1/2 inch in width on the surface on which it appears
or 1/6 the length or 1/2 the thickness. Evidence of decay in which the disintegration is readily
recognizable shall be cause for rejection.
3.8.2 Divergency of grain. The divergency of grain in faceboards, cleats, or battens shall not be
greater than 1 inch in 8 inches of length.
3.9 Faceboards. The thickness of resawn lumber used for faceboards or end boards shall be 3/8 +
1/16 inch thick.
3.9.1 Width of faceboards. The minimum width of any board at the lead or trailing edge of any
box blank shall be 3.5 inches. Boards used as sides for all boxes 5.5 inches or less in depth shall be one
piece otherwise the minimum width of any board used in the sides, top, bottom or end of a box shall be
2.5 inches.
3.9.2 Alternative faceboards. The use of 3/8 inch thick plywood, 3 ply minimum, is permissible
for faceboards. Plywood shall confirm to Type A of A-A-55057, Grade C-D with exterior glue
Identification index 24/0. The C face shall be outside. The grain of the face shall be parallel with the
length of the board required.
3.10 Thickness and width of cleats and battens.
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