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Home / Connectors and Fasteners / 20/25/30mm Square Tube Connectors, Galvanized Steel Joints, Three-Way Fasteners, Pipe Clamps and Base Plates

Attributes

Brand -
Category Industrial Small Parts / Connectors and Fasteners
Origin -
Material High-Grade Carbon Steel
Surface Treatment Hot-Dip Galvanized
Compatible Tube Size 20mm, 25mm, 30mm
Connector Type Three-Way T-Joint
Color Metallic Silver
Weight per Unit 50 grams
Package Includes 10 Connectors + Screws
Installation Method Screw Fixed
Application Scenario DIY Furniture, Shelving, Frames
Durability Rust and Corrosion Resistant

5 reviews

A

Anonymous

Apr 17, 2026

Rating: 5/5

Perfect for greenhouse frame

Used these to build a small greenhouse structure. They hold up well against outdoor elements.

A

Anonymous

Apr 03, 2026

Rating: 5/5

Easy assembly

Made building my workbench so much easier. Screws included were a nice touch.

A

Anonymous

Apr 01, 2026

Rating: 4/5

Value for money

Good pack size. One connector had a minor scratch but does not affect functionality.

A

Anonymous

Mar 28, 2026

Rating: 4/5

Good quality hardware

Solid steel construction. They were a bit tight on the 20mm tubes initially but loosened up after use.

A

Anonymous

Feb 01, 2026

Rating: 5/5

Excellent for DIY Shelving

These connectors fit my 25mm square tubes perfectly. The galvanized finish looks professional and feels sturdy.

5 FAQ

Q: What is the maximum load capacity?

A: Capacity depends on the tube thickness and frame design. Suitable for standard shelving loads.

Q: Does this fit standard 1 inch square tubing?

A: 1 inch is approximately 25.4mm. The 25mm size should fit snugly.

Q: Are mounting screws included in the package?

A: Yes, each connector comes with the necessary mounting screws.

Q: Do I need to pre-drill holes?

A: The included screws are self-tapping, but pre-drilling is recommended for harder steel tubes.

Q: Are these suitable for outdoor projects?

A: Yes, the galvanized coating provides rust resistance for outdoor use.

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