Mild Steel Square Tube
Grade
ASTM A513
A square tube is a hollow structural section with a square cross-section, made from durable high-quality steel. It provides excellent strength, stability, and uniform load distribution, making it ideal for construction, fabrication, frames, supports, railings, and general structural applications.
Cut to your exact length in-store — pickup or local delivery available.
128 sizes available.
Sizes GROUPED BY 'A' SIZE
3/8"
1/2"
5/8"
3/4"
7/8"
1"
1-3/4"
1-1/8"
1-1/2"
1-1/4"
2"
2-1/2"
2-1/4"
3"
3-1/2"
4"
4-1/2"
5"
6"
7"
8"
10"
12"
14"
16"
Select a size