Skip to main content
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.

Explore your interests

View More
All Categories
Best Seller (30)
New List (30)
Chengdu University City Laboratory Exhaust Piping and High-Purity Gas Pipeline Engineering - Consultation Welcome

Chengdu University City Laboratory Exhaust Piping and High-Purity Gas Pipeline Engineering - Consultation Welcome

$33,610.00

Premium Factory Supply Decorative Chains - Pendant Light Chains, Advertising Sign Hanging Chains, Anti-Static Iron Chains, Small Iron Links

Premium Factory Supply Decorative Chains - Pendant Light Chains, Advertising Sign Hanging Chains, Anti-Static Iron Chains, Small Iron Links

$61.15

[Damai Holds Micro-Needle Hair Transplant Patent] Precision Eyebrow Transplant – Custom Aesthetic Design

[Damai Holds Micro-Needle Hair Transplant Patent] Precision Eyebrow Transplant – Custom Aesthetic Design

$12,797.60

Commercial Dumpling & Bun Filling Machine – Automatic Stainless Steel Vegetable Chopper

Commercial Dumpling & Bun Filling Machine – Automatic Stainless Steel Vegetable Chopper

$4,400.00

HVAC Fan VFD Control Cabinet with Power Frequency to Variable Frequency Conversion

HVAC Fan VFD Control Cabinet with Power Frequency to Variable Frequency Conversion

$1,238.00

Export Quality Original Bathroom Paint Pens, Yellow and Green (2-Pack), Draw on Tiles and Glass

Export Quality Original Bathroom Paint Pens, Yellow and Green (2-Pack), Draw on Tiles and Glass

$4.93

Imported Automotive Transmission Differential Bearing B39-4 580704A

Imported Automotive Transmission Differential Bearing B39-4 580704A

$338.00

Fully Automatic Carbon Steel and Stainless Steel Filter, Self-Cleaning Vertical Filter, Automatic Blowdown Filter

Fully Automatic Carbon Steel and Stainless Steel Filter, Self-Cleaning Vertical Filter, Automatic Blowdown Filter

$37,500.00

Sheepskin Rattle for Babies 0-3 Years - Chewable Intangible Cultural Heritage Handmade Toy with Solid Wood and Brass Shaker Stick, Newborn Gift Box

Sheepskin Rattle for Babies 0-3 Years - Chewable Intangible Cultural Heritage Handmade Toy with Solid Wood and Brass Shaker Stick, Newborn Gift Box

$12.78

Swiss ITI Dental Implant / Korean Imported Dentium Implant Package with Crown - Shanghai Hospital

Swiss ITI Dental Implant / Korean Imported Dentium Implant Package with Crown - Shanghai Hospital

$3,980.00

Yandi Retainer Storage Case - Double-Layer Drain & Soak Box for Invisible Aligners and Orthodontic Cleaning

Yandi Retainer Storage Case - Double-Layer Drain & Soak Box for Invisible Aligners and Orthodontic Cleaning

$30.50

Leaf-Shaped Template Stamp for Kids - Transparent Silicone DIY Mold with Sponge for Maple Leaf Rubbing and Painting

Leaf-Shaped Template Stamp for Kids - Transparent Silicone DIY Mold with Sponge for Maple Leaf Rubbing and Painting

$4.93

High-Speed Internal Clamping Double Diaphragm Coupling High Torque Servo Motor Leadscrew Module Elastic Coupler

High-Speed Internal Clamping Double Diaphragm Coupling High Torque Servo Motor Leadscrew Module Elastic Coupler

$367.30

Eye-Care Journaling Highlighters for Students - Colorful Markers for Note-Taking and Key Points

Eye-Care Journaling Highlighters for Students - Colorful Markers for Note-Taking and Key Points

$3.02

Natural Stone Abacus Beads with Large Holes 5*10mm White Crystal Rose Crystal Flat Beads Jewelry Accessories Semi-Precious Stones

Natural Stone Abacus Beads with Large Holes 5*10mm White Crystal Rose Crystal Flat Beads Jewelry Accessories Semi-Precious Stones

$1.50

Heavy-Duty Lifting Chain with Shackles at Both Ends - Manganese Steel Hoist for Pipes, Rebar, and Stones

Heavy-Duty Lifting Chain with Shackles at Both Ends - Manganese Steel Hoist for Pipes, Rebar, and Stones

$72.00

Industrial Large Roll Oil-Absorbent Paper, Jumbo Lint-Free Wiping Rolls, Cleaning Paper, Wholesale Industrial Jumbo Rolls

Industrial Large Roll Oil-Absorbent Paper, Jumbo Lint-Free Wiping Rolls, Cleaning Paper, Wholesale Industrial Jumbo Rolls

$150.00

5-Inch Flocked Scouring Pad, Stainless Steel Rust Removal and Polishing Disc, Circular Brush Cloth with Backed Flocking for Polishing

5-Inch Flocked Scouring Pad, Stainless Steel Rust Removal and Polishing Disc, Circular Brush Cloth with Backed Flocking for Polishing

$25.00

High-Temperature Fire-Resistant Cotton Incense Burner Mat, Flame-Retardant Pad for Stick Incense Boxes and Aromatherapy Burners, Heat Insulation for Burning Incense

High-Temperature Fire-Resistant Cotton Incense Burner Mat, Flame-Retardant Pad for Stick Incense Boxes and Aromatherapy Burners, Heat Insulation for Burning Incense

$2.98

80 Pairs Zhuji Ankle Socks, Solid Color All-Season Trendy Student Casual Sports Boat Socks, Disposable Short Socks

80 Pairs Zhuji Ankle Socks, Solid Color All-Season Trendy Student Casual Sports Boat Socks, Disposable Short Socks

$9.14

Smart Toilet Storage Rack for Bathroom, Multi-Tier Floor-Standing Organizer with Waterproof Tissue Holder

Smart Toilet Storage Rack for Bathroom, Multi-Tier Floor-Standing Organizer with Waterproof Tissue Holder

$273.00

Yihuashu Calligraphy Felt Mat - Thickened Grid Cloth for Student Practice, Brush Writing Pad

Yihuashu Calligraphy Felt Mat - Thickened Grid Cloth for Student Practice, Brush Writing Pad

$1.98

Xiankan Yunshu [Danran] Ceramic Brush Washer - Hand-Painted Elegant Lily Design under Glaze for Calligraphy Supplies

Xiankan Yunshu [Danran] Ceramic Brush Washer - Hand-Painted Elegant Lily Design under Glaze for Calligraphy Supplies

$32.90

Chunfei Grocery Store Commuter Hard Fork Low-Step Mountain Bike for Road, City, Suburb, School, and Outings

Chunfei Grocery Store Commuter Hard Fork Low-Step Mountain Bike for Road, City, Suburb, School, and Outings

$2,224.64

Zhang Xiaofeng 'Fu Lu' Hotpot Inkstone Set – Covered Ceramic Ink Well for Calligraphy and Chinese Painting

Zhang Xiaofeng 'Fu Lu' Hotpot Inkstone Set – Covered Ceramic Ink Well for Calligraphy and Chinese Painting

$38.00

Invisalign Orthodontic Retainer Case, Portable Storage and Cleaning Box for Aligners and Dentures

Invisalign Orthodontic Retainer Case, Portable Storage and Cleaning Box for Aligners and Dentures

$12.30

Natural 7A Lavender Loose Beads Single Round Bead DIY Amethyst Spacer Beads Jewelry Making Semi-Finished Accessories

Natural 7A Lavender Loose Beads Single Round Bead DIY Amethyst Spacer Beads Jewelry Making Semi-Finished Accessories

$0.88

Paint Brush Cleaner - Mini Toilet Style Rinser for Watercolor and Gouache, Art Supply with Circulating Water System

Paint Brush Cleaner - Mini Toilet Style Rinser for Watercolor and Gouache, Art Supply with Circulating Water System

$16.90

Traditional Wooden Rattle Drum with Sheepskin Head for Early Education, Visual Tracking and Hearing Training for Newborn Boys and Girls

Traditional Wooden Rattle Drum with Sheepskin Head for Early Education, Visual Tracking and Hearing Training for Newborn Boys and Girls

$10.80

Car Tire Stone Removal Hook, Stainless Steel Multi-Function Tool for Cleaning Pebbles from Tires

Car Tire Stone Removal Hook, Stainless Steel Multi-Function Tool for Cleaning Pebbles from Tires

$6.21