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4-4 Staples and Steel Stitching

Staples and steel stitching are acceptable for closing a mailing container if they are spaced for the load type as follows:

• For an easy load or an average load, not more than 5 inches apart.

• For a difficult load, not more than 2-1/2 inches apart.example of loading steel stitched boxes 5 inches or more apart.










Staples must not be more than 1-1/4 inches from the ends of the box or mailing container. If a box's staple spacing does not meet these requirements, the box should be banded to compensate for the gap in the staple closure, or a strip of 3-inch-wide reinforced tape should be applied to the box between the staples (as shown in the illustration).

Envelopes, flat-size mailing containers, or cards that have partially opened staples are not acceptable for mailing.

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