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Staple Length Selection by Corrugated Thickness
Various staple leg lengths have been designed to penetrate through both the outer and inner carton flap layers, tightly clinching the flaps together without tearing the inner flap liner. Quality stapling tools are adjustable to permit a single staple leg length to work for varying thicknesses of corrugated. Although actual testing is the only true way to determine the correct leg length required for a particular application, as a general rule, the following leg lengths may be used for cartons constructed of the various minimum burst strength / edge crush (ECT) materials listed below.

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Recommended Staples
Carton
Burst / ECT
Recommended
Leg Length / Penetration Setting
Shipment
Weight
Max. Combined Inches
(L + W + D)
200SW/32 5/8" leg / full or shallow setting 65 75
250SW/40 5/8" leg / full setting 80 85
275SW/44 5/8" leg / full setting 95 95
350SW/55 3/4" leg / full or shallow setting 120 105
200DW/42 3/4" leg / full setting 80 85
275DW/48 3/4" leg / full setting 100 95
350DW/51 3/4" or 7/8" leg / full setting 120 104
400DW/61 7/8" leg / full setting 140 110
500DW/71 7/8" or 1" leg / full setting 160 115
600DW/82 1" or 1 1/8" leg / full setting 180 120
700TW/67 1 1/8" or 1 1/4" leg / full or shallow setting 240 110
900TW/80 1 1/4" or 1 3/8" leg / full or shallow setting 260 115
1100TW/90 1 3/8" leg / full setting 280 120
1300TW/112 1 3/8" leg / full setting 300 125