Attributes

Brand	-
Category	Standard Parts, Components & Industrial Consumables / Assemblies and Fasteners
Origin	-
Material	Galvanized Steel and Aluminum Alloy
Compatible Tube Sizes	20mm, 25mm, 30mm Square Tubes
Connection Type	Weld-Free Pass-Through Joint
Surface Finish	Hot-Dip Galvanized for Rust Resistance
Installation Method	Bolted Fastener System (No Welding Required)
Load Capacity	Suitable for Standard Guardrail Applications
Package Contents	Connector Joints, Bolts, Nuts, and Washers
Application Area	Fencing, Guardrails, Shelving Frames, Greenhouses
Corrosion Rating	High Durability in Outdoor Environments
Assembly Time	Rapid Installation with Basic Hand Tools

6 reviews

Anonymous

Mar 28, 2026

Rating: 5/5

Perfect for my backyard fence project

These connectors made building my garden fence incredibly easy. No need to hire a welder, and the galvanized finish looks great. The fit on the 25mm tubes was snug and secure.

Anonymous

Mar 14, 2026

Rating: 4/5

Good value for money

Bought the mixed pack for various tube sizes. The 20mm and 30mm connectors worked perfectly. Just make sure your tubes are truly square, as slightly rounded tubes might not slide in as easily.

Anonymous

Mar 12, 2026

Rating: 5/5

Great time saver

I used these for a commercial shelving unit. The weld-free design saved me hours of work. The bolts tightened down firmly, and there is no wobble in the structure.

Anonymous

Mar 11, 2026

Rating: 5/5

Professional results at home

As a hobbyist, I was worried about structural integrity without welding. These joints are surprisingly robust. My railing feels completely safe and stable.

Anonymous

Mar 10, 2026

Rating: 4/5

Sturdy but instructions could be clearer

The quality of the metal is excellent and feels very strong once assembled. I deducted one star because the diagram on the box was a bit small, but overall a solid product for DIY guardrails.

Anonymous

Mar 06, 2026

Rating: 5/5

Excellent corrosion resistance

Installed these near the coast where salt air is an issue. After six months, there is absolutely no sign of rust. The galvanization seems to be high quality.

5 FAQ

Q: Can these be used for load-bearing structures like a deck?

A: While strong, these are primarily intended for guardrails, fencing, and light framing. For primary load-bearing deck supports, please consult a structural engineer to ensure compliance with local building codes.

Q: Do these connectors work with round tubes?

A: No, these are specifically designed for square tubes only. Using them with round tubes will not provide a secure connection.

Q: Is the galvanization thick enough for coastal areas?

A: Yes, our hot-dip galvanized finish provides superior protection against salt spray and humidity, making it suitable for coastal environments.

Q: Are the bolts included stainless steel?

A: The included bolts are galvanized to match the connectors. If you require stainless steel bolts for extreme conditions, they can be purchased separately with the same thread pitch.

Q: What size wrench do I need for installation?

A: Standard metric wrenches or socket sets usually work best. The specific size depends on the bolt head included in your package, typically ranging from 10mm to 13mm.

Explore your interests

Honeywell Fresh Air Filter - ERF150/ERF250/ERF350C0N/ERF150D/250D/350D Replacement Filters

$54.00

Chint Claw Hammer, One-Piece Formed Iron Hammer, Tool Nail Hammer, Mini Household Small Hammer Specialized for Woodworking

$5.00

Aluminum Alloy Diaphragm Coupling High Rigidity High Torque SCPS DBJ SCPW Servo Screw Motor Coupling

$28.80

Mold Support Pins SKD61; Three-stage Support Rods; Two-stage Mold Ejector Pins; Heat-resistant Stepped Push Rods with Head; Secondary Support Pins

$5.80

304 Stainless Steel Split Lock Washer Spring Washer 316/201 Elastic Shim M1.6 M2 M3 M4 M5 M6 M8-M33

$1.20

Flanged Copper Bushing with Washer Bearing Powder Metallurgy Oil-Impregnated Copper Bushing with Shoulder Step Flange Copper Sleeve Inner Diameter 1-30

$0.76

Beech Wood Two-Piece Cleaver Handle Accessories, Household Fixed Guard, Handmade Knife Rivet Handle Replacement, Solid Wood Handle

$3.51

Xingchen Oil-Water Separator Filter AC2010-02D, Automatic Drain Two-Component Unit AC3010-03/AC4010

$8.00

Universal Joint Cross Bearing - Sizes 20x45, 22x55, 20x55

$19.00

Figure-8 Coupling GB Encoder Shaft Connector Polyurethane TPU Flexible Plastic Elastic Shaft Sleeve

$13.00

Heavy-Duty Double Steel Wire Tiger Clamp Galvanized Strong Hose Clamp for Pipes Hoses Water Oil Tubes Stainless Steel Band Clamp

$2.60

European Standard Aluminum Profile T-Slot Nuts, Carbon Steel Square Nuts for Types 20, 30, 40, 45 (M3/M4/M5)

$0.55

Custom Non-standard Parts

$650.00

GA/GB Precision Guide Bushing Inner Small Guide Post Stamping Hardware Mold Wear-Resistant 8 10 12 14 16 18 20 25

$3.20

Aotian Extreme 24-25 BURTON STEP ON GENESIS Men's Dual Highback Step-On Snowboard Bindings

$2,288.50

Cungang Micro Ball Guide Pillar and Sleeve, Precision Micro Ball Bushing Guide Assembly, Bronze Bushing, FA Automation Bearing

$60.00

Jinchao Grade 12.9 Socket Set Screws Pointed Machine Screws Headless Grub Screws M3 M4 M5 M6-M16

$0.92

CNC Lathe 0640 Chuck Saw 4-Cut Non-Quenched Round Through Hole 3-46 Internal Thread M48x1.5 Spindle

$20.00

304 Stainless Steel Extension Spring with S-Hook, Strong Curved Hook, Various Sizes and Lengths, Customizable for Oven Door Pull Springs

$1.00

Micro HK Needle Roller Bearing Assortment, Inner Diameters 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 17-40mm

$0.58

In Stock Kaisite Solenoid Valve DG4V-5-2C-FW-H-60H 0C 6C 33C 8C 7C

$820.00

Sliding Bar Socket Extension Bar Power Bar Sliding Bar Large 1/2 Medium 3/8 Small 1/4 Fly Rail Tube Wrench Extension Bar Sliding Rod Tool

$3.25

Rotary Worktable Vertical and Horizontal Dual-Use Indexing Plate High-Precision CNC Milling Machine Rotary Table Indexing Head TS TSL

$2,155.00

Flat Pressure Thrust Ball Bearings 51200 51201 51202 51203 51204 51205 51206

$4.60

M20 National Standard Turnbuckle, Malleable Iron Screw Rigging, Spiral Buckle, Galvanized Flower Lantern Bolt, Utility Pole Wire Rope Tensioner

$10.80

M6 M8 M10 M12 M14 M16 Stainless Steel 304 Round Head Rivets GB867 Knock-in Mushroom Head Solid Sign Rivets

$2.43

Hammer Drill Adapter Chuck: Universal Connector for Rotary Hammers and Hand Drills, Compatible with Round Shank (Two Grooves) and Square Shank (Four Grooves)

$5.04

Precision Ball Guide Pillar and Bushing, Rolling Types 20 22 25 28 32 38 SRP TRP SGP Mold Accessories

$28.00

Wear-Resistant Double-Sided Dustproof Wire Grommet Round Cable Bushing Ring for Chassis Rubber Seal

$20.80

400kg 600kg 800kg High-Power Electric Vacuum Suction Cup, Construction Site Building Glass Handling Vacuum Lifting Machine

$5,664.00

TWSNS Taizhuan Shannais Oil-Water Separator Filter Self-Adjusting Pressure Valve Air Source Treatment Two-Piece Unit Pressure Reducing Valve

$11.00

Heavy-Duty Universal Caster Wheels, Silent Load-Bearing Rollers with Brakes, Directional Swivel Wheels for Trolleys, Furniture Moving Base

$2.13

Heavy-Duty Swivel Caster Polyurethane 4568 Inch Push Cart Plate Cart Cargo Wheel Wear-Resistant Steering Wheel Brake Wheel

$4.27

Galvanized Spring Lock Washers Open Thickened Spring Washers Screw Washers M4 M5 M6 M8 M10 M12-36

$5.95

Sliding Bar 1 Inch Heavy Duty 1/2 Sliding Bar Socket Extension Bar 1/4 3/8 4 Extended Bar Long Adapter Connector

$9.95

Air Source Processor Two-Piece Unit (BFR2000, BFC2000/3000/4000), Pressure Regulating Oil-Water Separator

$45.00

304 Stainless Steel Cross Countersunk Head Screws, Flat Head Machine Bolts, Assorted Electronic Small Screws M2/M3/M4/M5/M6

$1.10

Composite Washer External Hex Drill Tail Self-Tapping Screws for Color Steel Roofing Tiles, National Standard with Washer

$24.00

Custom Helical Gears for Reducers - Non-Standard Cylindrical Spiral Gears with Left/Right Hand Rotation, Module 1-20, 45-Degree Helix Angle

$10.00

Hammer Nut Hammer Head Cap Furniture Two-in-One Connector Cylinder Hammer Embedded Hex Socket Screw Cap M6 M8

$3.00