FEFCO 0204: Center special slotted container (CSSC)

Dieline

FEFCO0204 Inside18 × 8 × 8 in Scalefit to sheet Rev2026-10-27

Try your size. Inside dimensions in inches; the drawing redraws as you type.

L W H

Construction

• The outer flaps, on the length panels, are half the width long, as on an RSC.
• The inner flaps, on the width panels, are half the length long, so they also meet across the center.
• Because the two flap lengths differ, the slots between them are offset and the blank has some cut-away waste beside the shorter flaps.

Closure. Tape or glue the outer seam as on an RSC. The inner layer already closes edge to edge.

Blank size

Nominal blank width is H + L, because the inner flaps (L ÷ 2 each) are the longest.

Allowances add one caliper per vertical score and per flap score. Your box maker sets the real scores. Work out other sizes with the box blank calculator.

Estimated compression strength

Simplified McKee estimate for the empty box at 18 × 8 × 8 in. The flap style barely changes McKee's answer, because it depends on the walls; extra flap layers help with drops and side stacking more than with top-to-bottom load.

Estimate only. Confirm with an ASTM D642 test before relying on it. Run the McKee calculator.

When to use it

Good for

• Long, narrow boxes where an RSC would leave a big inner gap
• Contents that need a flat, full floor without a separate pad

Watch for

• Blank width is set by the longer inner flaps (H + L), so board use rises with L
• More waste trimmed off at the slots

Open the Spec Builder to check style, grade and dimensional weight for your product.

Related styles

• 0200 Half slotted container
• 0201 Regular slotted container
• 0202 Overlap slotted container
• 0203 Full overlap slotted container
• 0205 Center special overlap slotted container
• 0206 Center special full overlap container
• All of the 02 series

Sources