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Square Metal Tube / Tubing

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Square Metal Tube / Tubing

Square metal tube stock is used in both structural and architectural applications. Versatility and strength are the key positives of square tubing for sale. Whether you're looking for popular sizes like 2x2 square tubing or 1-inch square tubing, you can find them at Online Metals available in full size and custom cut lengths. Why waste time searching for metal tubing near you when you can price and order online today and enjoy the convenience of having it delivered directly to you? Get started on your project today!

Square tube is stocked in most sizes at our metal supply warehouses in Portland, Dallas, Atlanta, Wallingford, Toledo, and Los Angeles. Standard lengths and cut to size are available.

We carry square metal tubing in aluminum, brass, carbon steel, and stainless steel.

Relevant Knowledge Hub Resources: Understanding Steel | 5 Reasons to Cut-to-Size | Weight Calculator

square-tube-large-new-min-4superZoom-main

Square Metal Tube / Tubing

Square metal tube stock is used in both structural and architectural applications. Versatility and strength are the key positives of square tubing for sale. Whether you're looking for popular sizes like 2x2 square tubing or 1-inch square tubing, you can find them at Online Metals available in full size and custom cut lengths. Why waste time searching for metal tubing near you when you can price and order online today and enjoy the convenience of having it delivered directly to you? Get started on your project today!

Square tube is stocked in most sizes at our metal supply warehouses in Portland, Dallas, Atlanta, Wallingford, Toledo, and Los Angeles. Standard lengths and cut to size are available.

We carry square metal tubing in aluminum, brass, carbon steel, and stainless steel.

Relevant Knowledge Hub Resources: Understanding Steel | 5 Reasons to Cut-to-Size | Weight Calculator

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335 results

335 results

3" x 3/16" Aluminum Square Tube 6061-T6-Extruded Part # 7058

Select a Size or Custom Cut

QTY

Update

$32.60 for 1

$32.60 ea.

Dimensions

Height: 3"
Wall: 0.1875"

Click for more details

aluminum-square-tube-6061-t6-extruded-1superZoom-mob{product.code}

Material Meets These Standard(s): ASTM-B221

Key Features

CUSTOM CUT

FREE MTR Available

View more product details

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aluminum-square-tube-6061-t6-extruded-1superZoom-desk7058

3" x 1/8" Aluminum Square Tube 6061-T6-Extruded Part # 18020

Select a Size or Custom Cut

QTY

Update

$25.68 for 1

$25.68 ea.

Dimensions

Height: 3"
Wall: 0.125"

Click for more details

aluminum-square-tube-6061-t6-extruded-1superZoom-mob{product.code}

Material Meets These Standard(s): ASTM-B221

Key Features

CUSTOM CUT

FREE MTR Available

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aluminum-square-tube-6061-t6-extruded-1superZoom-desk18020

3" x 1/4" Aluminum Square Tube 6061-T6-Extruded Radius Corner Part # 23688

Select a Size or Custom Cut

QTY

Update

$64.21 for 1

$64.21 ea.

Dimensions

Height: 3"
Wall: 0.25"

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aluminum-square-tube-6061-t6-radius-corners-1superZoom-mob{product.code}

Material Meets These Standard(s): ASTM-B221

Key Features

CUSTOM CUT

FREE MTR Available

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aluminum-square-tube-6061-t6-radius-corners-1superZoom-desk23688

3" x 1/4" Aluminum Square Tube 6063-T52-Extruded Part # 1200

Select a Size or Custom Cut

QTY

Update

$46.41 for 1

$46.41 ea.

Dimensions

Height: 3"
Wall: 0.25"

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aluminum-square-tube-6063-t52-1superZoom-mob{product.code}

Material Meets These Standard(s): ASTM-B221

Key Features

CUSTOM CUT

FREE MTR Available

View more product details

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aluminum-square-tube-6063-t52-1superZoom-desk1200

3" OD x 1/8" Wall Aluminum Square Tube 6063-T52 Extruded Part # 4602

Select a Size or Custom Cut

QTY

Update

$33.07 for 1

$33.07 ea.

Dimensions

Height: 3"
Wall: 0.125"

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aluminum-square-tube-6063-t52-1superZoom-mob{product.code}

Material Meets These Standard(s): ASTM-B221

Key Features

CUSTOM CUT

FREE MTR Available

View more product details

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aluminum-square-tube-6063-t52-1superZoom-desk4602

3" x 0.125" Brass Square Tube 385/280 Part # 24310

Select a Size or Custom Cut

QTY

Update

$487.00 for 1

$487.00 ea.

Dimensions

Height: 3"
Wall: 0.125"

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brass-square-tube-272-1superZoom-mob{product.code}

Key Features

CUSTOM CUT

FREE MTR Available

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brass-square-tube-272-1superZoom-desk24310

3" x 0.12" Stainless Square Tube 304 Welded Part # 538

Select a Size or Custom Cut

QTY

Update

$69.18 for 1

$69.18 ea.

Dimensions

Height: 3"
Wall: 0.12"

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stainless-square-tube-304-1superZoom-mob{product.code}

Material Meets These Standard(s): ASTM-A554

Key Features

CUSTOM CUT

FREE MTR Available

View more product details

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stainless-square-tube-304-1superZoom-desk538

3" x 0.25" Stainless Square Tube 304 Welded Part # 540

Select a Size or Custom Cut

QTY

Update

$105.51 for 1

$105.51 ea.

Dimensions

Height: 3"
Wall: 0.25"

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stainless-square-tube-304-1superZoom-mob{product.code}

Material Meets These Standard(s): ASTM-A554

Key Features

CUSTOM CUT

FREE MTR Available

View more product details

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stainless-square-tube-304-1superZoom-desk540

3" x 0.18" Stainless Square Tube 304 Welded Part # 539

Select a Size or Custom Cut

QTY

Update

$96.35 for 1

$96.35 ea.

Dimensions

Height: 3"
Wall: 0.18"

Click for more details

stainless-square-tube-304-1superZoom-mob{product.code}

Material Meets These Standard(s): ASTM-A554

Key Features

CUSTOM CUT

FREE MTR Available

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stainless-square-tube-304-1superZoom-desk539

3" x 0.25" Alloy Steel Square Tube 4130-Cond. N Cold Drawn Seamless Part # 28105

Select a Cut Size

QTY

Update

$207.81 for 1

$207.81 ea.

Dimensions

Height: 3"
Wall: 0.25"

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mild-steel-square-tube-hot-rolled-a500-1superZoom-mob{product.code}

Key Features

FREE MTR Available

View more product details

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mild-steel-square-tube-hot-rolled-a500-1superZoom-desk28105

3" x 3" x .250" Galvanized Steel Square Tube ASTM A123 Part # mp-00002871

Sold & Shipped by Competitive Metals

Select a Size

QTY

Update

$37.59 for 1

$37.59 ea.

Dimensions

Height: 3"
Wall: 0.25"
Ships In: 1-2 Business Days

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3" x 3" x .250" Galvanized Steel Square Tube ASTM A123-mob{product.code}

Key Features

CUSTOM CUT

U.S.A. Made DFARS Compliant

MTR AVAILABLE product return

product return

Non-returnable

View more product details

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3" x 3" x .250" Galvanized Steel Square Tube ASTM A123-deskmp-00002871

3" x 3" x .250" Galvanized Steel Square Tube ASTM A123 Part # mp-00002871

Dimensions

Height: 3"
Wall: 0.25"
Ships In: 1-2 Business Days

Select a Size

12″ (1 ft.) - $37.59 ea.
24″ (2 ft.) - $72.17 ea.
36″ (3 ft.) - $106.75 ea.
48″ (4 ft.) - $141.33 ea.
60″ (5 ft.) - $175.91 ea.
72″ (6 ft.) - $210.49 ea.

Seller's Info	Custom Cut	MTR	USA Made	Returns	DFARS	Price	Qty

3" x 0.25" No. 4 Finish Stainless Square Tube 304 Welded 60" Length Part # 27491

Pack of 4

QTY

Update

$1,758.24

$1,758.24 ea.

Dimensions

Height: 3"
Wall: 0.25"

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2023-02-07-No4Stainless-SquareTube-1-1000-min-superZoom-mob{product.code}

Key Features

FREE MTR Available

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2023-02-07-No4Stainless-SquareTube-1-1000-min-superZoom-desk27491

3" x 0.062" Brass Square Tube 335-H58 Part # 27943

Select a Size or Custom Cut

QTY

Update

$142.83 for 1

$142.83 ea.

Dimensions

Height: 3"
Wall: 0.062"

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Placeholder for future product image

Key Features

CUSTOM CUT

FREE MTR Available

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3" X .083" Carbon Steel Square Tube A500/A513 Part # mp-00064361

Sold & Shipped by A-Z Metals

Select a Size

QTY

Update

$19.95 for 1

$19.95 ea.

Dimensions

Height: 3"
Wall: 0.083"

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3" X .083" Carbon Steel Square Tube A500/A513-mob{product.code}

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

product return

Returns Acceptable.

View more product details

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3" X .083" Carbon Steel Square Tube A500/A513-deskmp-00064361

3" X .083" Carbon Steel Square Tube A500/A513 Part # mp-00064361

Dimensions

Height: 3"
Wall: 0.083"

Select a Size

12″ (1 ft.) - $19.95 ea.
24″ (2 ft.) - $31.91 ea.
36″ (3 ft.) - $44.83 ea.
48″ (4 ft.) - $55.88 ea.
72″ (6 ft.) - $74.32 ea.

Seller's Info	Custom Cut	MTR	USA Made	Returns	DFARS	Price	Qty

3" X .065" Carbon Steel Square Tube A500/A513 Part # mp-00064376

Sold & Shipped by A-Z Metals

Select a Size

QTY

Update

$16.72 for 1

$16.72 ea.

Dimensions

Height: 3"
Wall: 0.065"

Click for more details

3" X .065" Carbon Steel Square Tube A500/A513-mob{product.code}

Key Features

CUSTOM CUT DFARS Compliant

MTR AVAILABLE product return

product return

Returns Acceptable.

View more product details

Click for more details

3" X .065" Carbon Steel Square Tube A500/A513-deskmp-00064376

3" X .065" Carbon Steel Square Tube A500/A513 Part # mp-00064376

Dimensions

Height: 3"
Wall: 0.065"

Select a Size

12″ (1 ft.) - $16.72 ea.
24″ (2 ft.) - $26.15 ea.
36″ (3 ft.) - $36.36 ea.
48″ (4 ft.) - $44.50 ea.
72″ (6 ft.) - $61.30 ea.

Seller's Info	Custom Cut	MTR	USA Made	Returns	DFARS	Price	Qty

3.0" x 1/8" Wall Acrylic Square Tube - Clear Part # mp-00064808

Sold & Shipped by K-Mac Distribution

Select a Size

QTY

Update

$169.59 for 1

$169.59 ea.

Dimensions

Height: 3"
Wall: 0.125"
Color: Clear
Tolerance: Square Tolerance +/- .015"

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3.0" x 1/8" Wall Acrylic Square Tube - Clear-mob{product.code}

Key Features

CUSTOM CUT

U.S.A. Made DFARS Compliant

MTR NOT AVAILABLE product return

product return

Returns Acceptable.

View more product details

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3.0" x 1/8" Wall Acrylic Square Tube - Clear-deskmp-00064808

3.0" x 1/8" Wall Acrylic Square Tube - Clear Part # mp-00064808

Dimensions

Height: 3"
Wall: 0.125"
Color: Clear
Tolerance: Square Tolerance +/- .015"

Select a Size

72″ (6 ft.) - $169.59 ea.

Seller's Info	Custom Cut	MTR	USA Made	Returns	DFARS	Price	Qty

3" x 3/8" Carbon Steel Square Tube A500-A513 Hot Rolled Part # mp-00064826

Sold & Shipped by KMP Metals LLC

Select a Size

QTY

Update

$39.74 for 1

$39.74 ea.

Dimensions

Height: 3"
Wall: 0.375"

Click for more details

3" x 3/8" Carbon Steel Square Tube A500-A513 Hot Rolled-mob{product.code}

Key Features

CUSTOM CUT

U.S.A. Made DFARS Compliant

MTR AVAILABLE product return

product return

Non-returnable

View more product details

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3" x 3/8" Carbon Steel Square Tube A500-A513 Hot Rolled-deskmp-00064826

3" x 3/8" Carbon Steel Square Tube A500-A513 Hot Rolled Part # mp-00064826

Dimensions

Height: 3"
Wall: 0.375"

Select a Size

12″ (1 ft.) - $39.74 ea.
24″ (2 ft.) - $66.30 ea.
36″ (3 ft.) - $84.17 ea.
48″ (4 ft.) - $106.41 ea.
60″ (5 ft.) - $132.07 ea.
72″ (6 ft.) - $157.73 ea.
84″ (7 ft.) - $176.05 ea.
96″ (8 ft.) - $200.67 ea.
108″ (9 ft.) - $220.85 ea.
120″ (10 ft.) - $244.97 ea.
132″ (11 ft.) - $269.09 ea.
144″ (12 ft.) - $293.21 ea.
156″ (13 ft.) - $317.33 ea.
168″ (14 ft.) - $341.45 ea.
180″ (15 ft.) - $365.57 ea.
192″ (16 ft.) - $389.69 ea.
204″ (17 ft.) - $413.81 ea.
216″ (18 ft.) - $437.93 ea.
228″ (19 ft.) - $462.05 ea.
240″ (20 ft.) - $486.17 ea.

Seller's Info	Custom Cut	MTR	USA Made	Returns	DFARS	Price	Qty

3 1/2" x 0.12" Carbon Steel Square Tube A500 Hot Rolled Part # 10368

Select a Size or Custom Cut

QTY

Update

$21.75 for 1

$21.75 ea.

Dimensions

Height: 3.5"
Wall: 0.12"

Click for more details

mild-steel-square-tube-hot-rolled-a500-1superZoom-mob{product.code}

Material Meets These Standard(s): ASTM-A500

Key Features

CUSTOM CUT

FREE MTR Available

View more product details

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mild-steel-square-tube-hot-rolled-a500-1superZoom-desk10368

3 1/2" x 0.1875" Carbon Steel Square Tube A500 Hot Rolled Part # 10370

Select a Size or Custom Cut

QTY

Update

$25.39 for 1

$25.39 ea.

Dimensions

Height: 3.5"
Wall: 0.1875"

Click for more details

mild-steel-square-tube-hot-rolled-a500-1superZoom-mob{product.code}

Material Meets These Standard(s): ASTM-A500

Key Features

CUSTOM CUT

FREE MTR Available

View more product details

Click for more details

mild-steel-square-tube-hot-rolled-a500-1superZoom-desk10370

3 1/2" x 0.25" Carbon Steel Square Tube A500 Hot Rolled Part # 10371

Select a Size or Custom Cut

QTY

Update

$33.50 for 1

$33.50 ea.

Dimensions

Height: 3.5"
Wall: 0.25"

Click for more details

mild-steel-square-tube-hot-rolled-a500-1superZoom-mob{product.code}

Material Meets These Standard(s): ASTM-A500

Key Features

CUSTOM CUT

FREE MTR Available

View more product details

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mild-steel-square-tube-hot-rolled-a500-1superZoom-desk10371

3 1/2" x 1/4" Aluminum Square Tube 6061-T6-Extruded Part # 14521

Select a Size or Custom Cut

QTY

Update

$77.51 for 1

$77.51 ea.

Dimensions

Height: 3.5"
Wall: 0.25"

Click for more details

aluminum-square-tube-6061-t6-extruded-1superZoom-mob{product.code}

Material Meets These Standard(s): ASTM-B221

Key Features

CUSTOM CUT

FREE MTR Available

View more product details

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aluminum-square-tube-6061-t6-extruded-1superZoom-desk14521

3 1/2" x 3/8" Carbon Steel Square Tube A500-A513 Hot Rolled Part # mp-00064834

Sold & Shipped by KMP Metals LLC

Select a Size

QTY

Update

$45.18 for 1

$45.18 ea.

Dimensions

Height: 3.5"
Wall: 0.375"

Click for more details

3 1/2" x 3/8" Carbon Steel Square Tube A500-A513 Hot Rolled-mob{product.code}

Key Features

CUSTOM CUT

U.S.A. Made DFARS Compliant

MTR AVAILABLE product return

product return

Non-returnable

View more product details

Click for more details

3 1/2" x 3/8" Carbon Steel Square Tube A500-A513 Hot Rolled-deskmp-00064834

3 1/2" x 3/8" Carbon Steel Square Tube A500-A513 Hot Rolled Part # mp-00064834

Dimensions

Height: 3.5"
Wall: 0.375"

Select a Size

12″ (1 ft.) - $45.18 ea.
24″ (2 ft.) - $77.94 ea.
36″ (3 ft.) - $100.13 ea.
48″ (4 ft.) - $126.73 ea.
60″ (5 ft.) - $157.42 ea.
72″ (6 ft.) - $180.60 ea.
84″ (7 ft.) - $205.92 ea.
96″ (8 ft.) - $234.77 ea.
108″ (9 ft.) - $263.62 ea.
120″ (10 ft.) - $292.47 ea.
132″ (11 ft.) - $321.32 ea.
144″ (12 ft.) - $350.18 ea.
156″ (13 ft.) - $379.03 ea.
168″ (14 ft.) - $407.88 ea.
180″ (15 ft.) - $436.73 ea.
192″ (16 ft.) - $465.58 ea.
204″ (17 ft.) - $494.43 ea.
216″ (18 ft.) - $523.28 ea.
228″ (19 ft.) - $552.14 ea.
240″ (20 ft.) - $580.99 ea.

Seller's Info	Custom Cut	MTR	USA Made	Returns	DFARS	Price	Qty

4" x 0.188" Stainless Square Tube 316 Welded Part # 2238

Select a Size or Custom Cut

QTY

Update

$89.27 for 1

$89.27 ea.

Dimensions

Height: 4"
Wall: 0.188"

Click for more details

stainless-square-tube-316-1superZoom-mob{product.code}

Material Meets These Standard(s): ASTM-A240(call for availability) , ASTM-A554

Key Features

CUSTOM CUT

FREE MTR Available

View more product details

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stainless-square-tube-316-1superZoom-desk2238

4" x 0.25" Stainless Square Tube 316 Welded Part # 2239

Select a Size or Custom Cut

QTY

Update

$171.72 for 1

$171.72 ea.

Dimensions

Height: 4"
Wall: 0.25"

Click for more details

stainless-square-tube-316-1superZoom-mob{product.code}

Material Meets These Standard(s): ASTM-A240(call for availability) , ASTM-A554

Key Features

CUSTOM CUT

FREE MTR Available

View more product details

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stainless-square-tube-316-1superZoom-desk2239

4" x 0.12" Carbon Steel Square Tube A500 Hot Rolled Part # 10376

Select a Size or Custom Cut

QTY

Update

$27.08 for 1

$27.08 ea.

Dimensions

Height: 4"
Wall: 0.12"

Click for more details

mild-steel-square-tube-hot-rolled-a500-1superZoom-mob{product.code}

Material Meets These Standard(s): ASTM-A500

Key Features

CUSTOM CUT

FREE MTR Available

View more product details

Click for more details

mild-steel-square-tube-hot-rolled-a500-1superZoom-desk10376

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