For a 20-foot project using 3/4-inch square tubing, verify both the tube’s outside dimensions and its supplied length before ordering. The listed Allstar mild-steel tubing matches the 3/4-inch square-tube requirement, but it is only 4 feet long—not 20 feet. The other supplied products are hoses or tubing with different shapes and dimensions, so they are not suitable substitutes for square steel tubing.
| Product | Listed size or length | Best fit |
|---|---|---|
| Allstar Square Mild Steel Tubing | 3/4 inch; 4 feet long | Short sections or projects where multiple lengths can be joined |
Allstar 3/4-Inch Square Mild Steel Tubing
This Allstar product is the only supplied listing that matches the requested square-tubing shape and 3/4-inch size. Its listed dimensions are 3/4 inch by 3/4 inch, with a .049-inch wall thickness, and the supplied piece is 4 feet long. The package dimensions are approximately 48.2 inches long, and its listed package weight is about 1.95 pounds.
Best for: Buyers who need a short piece of 3/4-inch square mild-steel tubing, or who can source and assemble several sections for a larger project. It was selected because its shape, material, and stated size directly match the core tubing request.
Important limitation: This is not a single 20-foot length. Reaching 20 feet would require multiple sections and a suitable joining method; the listing details do not specify how to make a structural joint or whether the tubing is appropriate for a particular load.
Buying Guide
Does the listed product provide a continuous 20-foot length?
No. The matching listing specifies a 4-foot piece. A 20-foot project may need a continuous length, or it may allow shorter pieces joined together. Confirm this requirement before buying. Joints can affect alignment, appearance, and strength, so do not assume that several short pieces perform like one uninterrupted tube.
What does 3/4-inch square tubing mean?
Square tubing is typically described by its outside width and height. For a 3/4-inch square tube, both outside dimensions should be 3/4 inch. Check the product description and drawing, if available, to distinguish square tubing from round tubing, flat bar, or angle stock. Also verify whether the measurement is nominal or exact for the intended fit.
How important is wall thickness?
The Allstar listing states a .049-inch wall thickness. Wall thickness affects the tube’s inside opening, weight, and potential stiffness, but the supplied details do not establish a safe load capacity. Match wall thickness to the project’s engineering requirements rather than choosing by outside size alone. For a load-bearing use, consult project specifications or a qualified professional.
What should buyers check before ordering steel tubing?
- Length: Confirm whether the seller supplies one continuous piece or shorter sections.
- Material: This listing identifies mild steel; check whether the project calls for a different material or finish.
- Dimensions: Verify outside width, height, and wall thickness.
- Cutting and joining: Plan how the tube will be cut, connected, and finished. The listing does not provide fabrication instructions.
- Quantity: Calculate how many pieces are needed, allowing for cuts and waste.
Are the other listed 20-foot products substitutes?
No. The other supplied listings describe RV sewer hoses and 1/4-inch-outer-diameter nylon air-line tubing. They are not 3/4-inch square steel tubing. A product’s 20-foot length alone does not make it suitable; material, cross-section, dimensions, and intended use must also match.
Frequently Asked Questions
Is the Allstar tubing 20 feet long?
No. The listed Allstar piece is 4 feet long.
Is the Allstar product square tubing?
Yes. Its name identifies it as square mild-steel tubing, and its listed size is 3/4 inch with a .049-inch wall.
Can I make a 20-foot run from five 4-foot pieces?
Five 4-foot pieces total 20 feet before accounting for cuts or connection overlap. Whether joined sections meet a project’s strength and alignment needs depends on the joint design and intended use.
Are any supplied listings both 20 feet long and 3/4-inch square tubing?
No. The matching square-steel listing is 4 feet long. The listed 20-foot products are hoses, not square steel tubing.