Steel Square Tubing 4" x 4" x 3/16" is a strong, versatile structural tube commonly used for fabrication, reinforcement, and general steel projects where you want clean lines and dependable strength. The 4" square profile offers excellent rigidity, and the 3/16" wall thickness provides a solid balance of durability and workable weight—basically the kind of steel that doesn’t flinch when the project gets serious.
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Key Features / Specifications
Ideal For