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Home / Assemblies and Fasteners / Internal Groove Connector 2020/3030/4040/4545 Aluminum Profile Accessories L-Shaped Right-Angle Fixer European/National Standard

Attributes

Brand -
Category Standard Parts, Components & Industrial Consumables / Assemblies and Fasteners
Origin -
Material High-Grade Aluminum Alloy 6063-T5
Compatible Profiles 2020, 3030, 4040, 4545 Series
Connector Type Internal L-Shaped Right-Angle
Standard Compliance European and National Standards
Surface Finish Anodized Silver
Installation Method Hammer-in with T-Nut and Bolt
Load Capacity Suitable for medium-duty framing
Package Contents Connectors, T-Nuts, and Bolts included
Application DIY CNC, Workbenches, Safety Guards
Corrosion Resistance High resistance to oxidation

6 reviews

A

Anonymous

Mar 28, 2026

Rating: 5/5

Exactly as described

Fits both European and national standard profiles as advertised. Fast shipping and well-packaged to prevent damage.

A

Anonymous

Mar 27, 2026

Rating: 5/5

Sturdy construction

Built a workbench using these internal corners. The structure is very stable and doesn't wobble at all. Highly recommended for serious projects.

A

Anonymous

Mar 15, 2026

Rating: 5/5

Clean look

I love that these are internal connectors; they keep the outside of the frame clean and smooth without protruding brackets.

A

Anonymous

Mar 14, 2026

Rating: 4/5

Good value but tight fit

The build quality is excellent for the price. They were a bit tight on my 3030 profiles initially, but a gentle tap with a rubber mallet solved it.

A

Anonymous

Mar 13, 2026

Rating: 4/5

Solid hardware

The bolts and nuts provided are decent quality. One connector had a minor scratch, but it doesn't affect functionality since it's hidden inside.

A

Anonymous

Mar 04, 2026

Rating: 5/5

Perfect fit for my 4040 frame

These connectors slid in smoothly and held the angle perfectly rigid. Great quality aluminum and the hardware kit was complete.

5 FAQ

Q: Will this work with 20mm x 20mm profiles?

A: Absolutely, this connector set is compatible with the 2020 series along with 3030, 4040, and 4545 profiles.

Q: Do these come with the necessary screws and T-nuts?

A: Yes, each package includes the appropriate T-nuts and bolts required for installation.

Q: Is the material strong enough for a standing desk frame?

A: Yes, made from 6063-T5 aluminum alloy, these are suitable for medium-duty applications like standing desk frames when used with adequate support legs.

Q: Can I reuse these if I disassemble my frame?

A: Yes, they can be removed and reused, though care should be taken not to strip the threads on the bolts during removal.

Q: What tool is needed to install these?

A: You typically need a rubber mallet to tap the connector into the profile slot and an Allen wrench or screwdriver to tighten the bolt.

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