Skip to main content
Home / Assemblies and Fasteners / Square Tube Connector Weld-Free Fixing Clip 20/25/30/40 Galvanized Cast Iron Connector Square Steel Fixer

Attributes

Brand -
Category Standard Parts, Components & Industrial Consumables / Assemblies and Fasteners
Origin -
Material Galvanized Cast Iron
Compatible Tube Sizes 20mm, 25mm, 30mm, 40mm
Installation Type Weld-Free Bolted Connection
Surface Finish Hot-Dip Galvanized
Load Capacity Heavy Duty Structural Grade
Corrosion Resistance High (Outdoor Suitable)
Package Contents Connector Clips and Mounting Bolts
Application Fencing, Railing, Shelving Frames
Color Metallic Silver
Country of Origin Manufactured to International Standards

6 reviews

A

Anonymous

Mar 13, 2026

Rating: 4/5

Good product, instructions could be better

The clips themselves are fantastic quality. My only complaint is the lack of detailed torque specifications in the packaging. I had to look up standard values online. Otherwise, great product.

A

Anonymous

Mar 13, 2026

Rating: 5/5

Exactly as described

Ordered the 25mm size and they fit my tubing spot on. The galvanization is thick and even. Good value for money compared to buying custom welded parts.

A

Anonymous

Mar 12, 2026

Rating: 5/5

Perfect for my garden fence project

These connectors made assembling my square tube fence incredibly easy. No welding needed, just bolt them on. The galvanized finish looks durable and should last through the winter.

A

Anonymous

Mar 08, 2026

Rating: 5/5

Excellent industrial grade fixer

Used these for a warehouse shelving unit. The weld-free design saved us hours of labor. Very tight fit with no wobble once tightened. Highly recommended for DIY or pro use.

A

Anonymous

Mar 08, 2026

Rating: 4/5

Sturdy but heavy

Great quality cast iron. They are quite heavy which gives me confidence in their strength, but make sure you have help when installing larger structures. Fits the 30mm tubes perfectly.

A

Anonymous

Mar 05, 2026

Rating: 5/5

Saved me so much time

Building a railing for my deck was daunting until I found these. The ability to adjust angles slightly before final tightening was a lifesaver. Solid construction.

5 FAQ

Q: Can these be used outdoors in coastal areas?

A: The hot-dip galvanized finish offers high corrosion resistance suitable for most outdoor environments. However, in harsh coastal areas with high salt spray, we recommend applying an additional protective wax or paint layer for extended longevity.

Q: Is it possible to disassemble and reuse these clips?

A: Yes, one of the main advantages of this weld-free system is reusability. You can unbolt the clips and move them to a new location as long as the bolts and threads remain undamaged.

Q: What size wrench do I need for installation?

A: Most of our kits come with standard metric bolts. Typically, a 13mm or 17mm socket or open-ended wrench is required, depending on the specific tube size kit you purchased. Please check the included hardware list.

Q: Do you sell the matching end caps for these tubes?

A: We do sell compatible end caps separately. Please visit our 'Accessories' section and filter by your tube size to find the correct galvanized end caps for a finished look.

Q: Do these connectors work with aluminum square tubes?

A: Yes, they are compatible with aluminum tubes provided the outer dimensions match the specified sizes (20/25/30/40mm). However, ensure you use stainless steel bolts to prevent galvanic corrosion between the cast iron and aluminum.

Explore your interests

View More
All Categories
Best Seller (30)
New List (30)
Acrylic Markers for Kids, Washable Art Watercolor Pens for Elementary Students, Opaque and Layerable, Direct Liquid Ink Core

Acrylic Markers for Kids, Washable Art Watercolor Pens for Elementary Students, Opaque and Layerable, Direct Liquid Ink Core

$19.90

304 Stainless Steel Chain - Long/Short Link Lifting Chain, Hoist Chain, Clothesline, Swing, Pet Chain, Anti-Theft Chain

304 Stainless Steel Chain - Long/Short Link Lifting Chain, Hoist Chain, Clothesline, Swing, Pet Chain, Anti-Theft Chain

$1.53

Face Towel Storage Box for Disposable Cleansing Tissues and Cotton Pads, Wall-Mounted Bathroom Organizer

Face Towel Storage Box for Disposable Cleansing Tissues and Cotton Pads, Wall-Mounted Bathroom Organizer

$19.90

France Arches Watercolor Paper Handmade 100% Cotton Artist Grade Sample Sheets Loose Paper 300G 640G Full Sheet Half Sheet 4K 8K 16K Medium and Rough Texture Watercolor Paint Paper

France Arches Watercolor Paper Handmade 100% Cotton Artist Grade Sample Sheets Loose Paper 300G 640G Full Sheet Half Sheet 4K 8K 16K Medium and Rough Texture Watercolor Paint Paper

$20.80

Premium Ceramic Tea Canister Gift Box – Empty Packaging for Black, Pu'er, White, and Biluochun Tea

Premium Ceramic Tea Canister Gift Box – Empty Packaging for Black, Pu'er, White, and Biluochun Tea

$121.00

Rechargeable Gen 2 Personal Air Purifier with Auto Fan for Travel, Commute, and Flights

Rechargeable Gen 2 Personal Air Purifier with Auto Fan for Travel, Commute, and Flights

$145.00

Roast Duck Warmer Cabinet, Constant Temperature Box, Commercial Crispy Pork Belly Hanging Duck Cabinet, Roasted Chicken and Cooked Food Display Warmer

Roast Duck Warmer Cabinet, Constant Temperature Box, Commercial Crispy Pork Belly Hanging Duck Cabinet, Roasted Chicken and Cooked Food Display Warmer

$318.00

Guangda Dental | Straumann Implant Services for Missing Teeth Restoration (Foshan Branch Only)

Guangda Dental | Straumann Implant Services for Missing Teeth Restoration (Foshan Branch Only)

$2,052.00

Painted Wooden Colored Pencils Set with Gold Powder, Creative Engineering Pencils for Gongbi Coloring, Basic Packaging

Painted Wooden Colored Pencils Set with Gold Powder, Creative Engineering Pencils for Gongbi Coloring, Basic Packaging

$11.12

South Korea Dentium Dental Implant Abutment with Full Ceramic Crown for Missing Tooth Restoration

South Korea Dentium Dental Implant Abutment with Full Ceramic Crown for Missing Tooth Restoration

$1,980.00

Balloon Warm Star Pre-order Unspoken Words Phase 3 17 Years Old Little Bean 'Chance Encounter' Series Merchandise

Balloon Warm Star Pre-order Unspoken Words Phase 3 17 Years Old Little Bean 'Chance Encounter' Series Merchandise

$22.00

Tissue Holder Magnetic Punch-free for Mirror Cabinets

Tissue Holder Magnetic Punch-free for Mirror Cabinets

$5.73

Industrial Scouring Pad Roll – Abrasive Brushed Cloth for Stainless Steel Polishing and Finishing

Industrial Scouring Pad Roll – Abrasive Brushed Cloth for Stainless Steel Polishing and Finishing

$20.00

DIY Aromatherapy Candle Wax Melting Cup – Stainless Steel Handle Heating Pot with Multi-Size Measuring Spoons and Color Mixing Cup

DIY Aromatherapy Candle Wax Melting Cup – Stainless Steel Handle Heating Pot with Multi-Size Measuring Spoons and Color Mixing Cup

$5.78

7-Piece Square Pot Set B with Tray, Plastic Colorful Succulent Pots, Simple and Durable Design for Root Explosion and Control, White Square Pots

7-Piece Square Pot Set B with Tray, Plastic Colorful Succulent Pots, Simple and Durable Design for Root Explosion and Control, White Square Pots

$53.00

Multi-Layer Over-Toilet Storage Rack, Floor-Standing Laundry Organizer for Bathroom, Balcony, No-Drill Installation

Multi-Layer Over-Toilet Storage Rack, Floor-Standing Laundry Organizer for Bathroom, Balcony, No-Drill Installation

$31.42

Feiyue Car Tires: Sizes 205, 195, 215, 255; Longteng Series 45, 50, 25, 65, 60R16, 17 Rim 8

Feiyue Car Tires: Sizes 205, 195, 215, 255; Longteng Series 45, 50, 25, 65, 60R16, 17 Rim 8

$485.00

2 Pieces Free Shipping Outdoor Rafting Creek Swimming Gear Dustproof Waterproof Bag Wearable or Handheld Ultra-Light Storage Sack

2 Pieces Free Shipping Outdoor Rafting Creek Swimming Gear Dustproof Waterproof Bag Wearable or Handheld Ultra-Light Storage Sack

$8.50

[Dental Implant Chief Specialist] Implant Examination and Treatment Planning

[Dental Implant Chief Specialist] Implant Examination and Treatment Planning

$9.90

Wall-Mounted Toilet Storage Rack - No-Drill Bathroom Shelf Organizer for Above the Toilet

Wall-Mounted Toilet Storage Rack - No-Drill Bathroom Shelf Organizer for Above the Toilet

$26.07

New Wireless Car Vacuum Cleaner, High Suction Home Use, Compact Handheld Silent High-Power Vacuum

New Wireless Car Vacuum Cleaner, High Suction Home Use, Compact Handheld Silent High-Power Vacuum

$114.00

Electric Watercolor Spray Pen Children Hand-painted Color Pa

Electric Watercolor Spray Pen Children Hand-painted Color Pa

$47.55

Cement-Specific Pigment Powder for DIY Crafts, Gypsum Dye for Creative Flower Pot Coloring

Cement-Specific Pigment Powder for DIY Crafts, Gypsum Dye for Creative Flower Pot Coloring

$3.83

9 Garrett iCover 270 Twin 5RX Restech 072.6S28 Turbocharger 20-Dragon 0TXD GT 37042

9 Garrett iCover 270 Twin 5RX Restech 072.6S28 Turbocharger 20-Dragon 0TXD GT 37042

$6,755.00

Household Small Range Hood, Portable USB Desktop Fume Extractor for Living Room Hot Pot and BBQ Odor Removal, Mini Smoke Absorber

Household Small Range Hood, Portable USB Desktop Fume Extractor for Living Room Hot Pot and BBQ Odor Removal, Mini Smoke Absorber

$41.00

Retainer Storage Box, Clear Case for Invisible Aligners with Mirror, Portable Orthodontic Appliance Carrier, Instagram Style

Retainer Storage Box, Clear Case for Invisible Aligners with Mirror, Portable Orthodontic Appliance Carrier, Instagram Style

$13.40

Hairline Transplant | No-Shave Hair Transplant | 1-1500 Units Long Hair Planting for Natural Flow and Volume - Department Director Service

Hairline Transplant | No-Shave Hair Transplant | 1-1500 Units Long Hair Planting for Natural Flow and Volume - Department Director Service

$25,800.00

Zhong Yao Xuan Shi Biao Small Regular Script Hard Pen Copybook, 1.8cm Column Width, Tear-Off Sheets for Precise Tracing – Source of Regular Script

Zhong Yao Xuan Shi Biao Small Regular Script Hard Pen Copybook, 1.8cm Column Width, Tear-Off Sheets for Precise Tracing – Source of Regular Script

$29.70

Chunfei Grocery Store Yun'an GR02 Gravel Bike Thru-Axle Disc Brake Lightweight Touring with Multiple Rack Mounts

Chunfei Grocery Store Yun'an GR02 Gravel Bike Thru-Axle Disc Brake Lightweight Touring with Multiple Rack Mounts

$8,974.00

Anti-Tangle High-Strength Grade 100 Lifting Chain for Industrial Hoisting

Anti-Tangle High-Strength Grade 100 Lifting Chain for Industrial Hoisting

$776.44