sq116

SQ 116 - Box Corner Middle Cross

SQ116 Box Corner Middle Cross joins three SHS bars at 90-degree corner angles. Slip-on design, hex key tightening. Ideal for railings, furniture, and structural frameworks.
Product appearance and finishes may differ by manufacturer and batch. Uniform finishes cannot be guaranteed.
$
13.24
 
$

SQ 116 - Box Corner Middle Cross

$
13.24
 
$
SQ116 Box Corner Middle Cross joins three SHS bars at 90-degree corner angles. Slip-on design, hex key tightening. Ideal for railings, furniture, and structural frameworks.
Size
SHS 25 x 25mm SHS 40 x 40mm
OD = Outside Diameter | NB = Nominal Bore (hollow core of the tube)*
* May vary based on wall thickness
PAYMENT METHODS ACCEPTED
Details
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The SQ116 Box Corner Middle Cross fittings joins three Square Hollow Section (SHS) bars together to make a corner structure. Each SHS bar is attached at a 90-degree angle from the other bar with one passing horizontally through the middle of the fitting.

Designed for both indoor and outdoor projects, these fittings feature our easy slip-on and tightens connection system which only requires a hex key to secure.

- For a fitting to suit circular tube instead use TC116 Corner Middle Cross.

Common Usage

We commonly see these fittings used in railing applications. They can be used as corner pieces for middle rails, or for top rails in addition to an end cap.

They can used to build just about any rectangular structure, such as desks, bed frames and other furniture, handrail corners and racking structures.

- Often paired with SQ128 Box Corner Top Cross.

Technical Information
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Material:
Fittings cast of malleable cast iron - galvanized finish

Cast iron fittings or casting to comply with AS 1832 (ISO 5922)

Hot Dipped Galvanized finish to comply with AS 4680.


Set Screw:

Cup Point Case hardened setscrew in 45CR Alloy Steel (alternative* Stainless Steel 308)

Size C42, D48, E60 using 3/8” ISO 228 with 5/16” (8mm) hex key

Size A27, B34 using ¼” ISO 228 with ¼” (6.5mm) hex key

Size T21 using 1/8 BSF with 3/16” (5mm) hex key.


Feature:
No welding required. Structural fittings slip directly onto bar and are secured using an allen key to tightened provided setscrews.

Tensile Load:
Min 5,650 N axial load subjected to 40Nm tightened torque (FOS 2.0 min).

Testing:
Tested internally by Solid Dynamics Engineering Pty Ltd. Testing videos are available upon request.

Design:
Tubeclamp Structural Fittings, when properly installed per manufacturing recommendations, meet or exceed all applicable requirements as specified by Australian Standard.

Application:
Handrails, Trolley Bays, Temporary Structure, Shop Fittings, Furnitures and many more.
Size Guide
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Please note that not all sizes are available for every product.

Tube Size Reference Chart

 Fitting Size Code

Outside Diameter

NB (Metric)

NB (Imperial)
T21
21.3mm
15
1/2"
A27
26.9mm
20
3/4"
B34
33.7mm
25
1"
C42
42.4mm
32
1 1/4"
D48
48.3mm
40
1 1/2"
E60
60.3mm
50
2"
SHS25
25 x 25mm
N/A
N/A
SHS40
40 x 40mm
N/A
N/A
G50
50mm (Alu)
N/A
N/A
*Figures given as guidance only, dimensions and weights are subject to manufacturing tolerances and may be altered without prior notice.
Tube OD / NB Diagram
Product FAQ
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Which fitting size do I chose?

We offer our Boxclamp fittings in two sizes according to Australian standard square bar sizes, ranging from 25 x 25mm to 40 x 40mm. 

To select the right fitting, simply measure the outside diameter (OD) of your pipe and choose the corresponding fitting size.


For example, if your bar has a 40mm outside diameter, you would select the SHS 40x 40mm fitting size.

Metric or Imperial?

You'll see a table that compares various international measurements in the 'Size Guide' section above.

Why is the fitting bigger then my tube?

Our fittings are intentionally made slightly larger than the pipes they correspond to, so that they can easily slide onto both straight and bent bars. If you're worried that the gap might be too big, you can try replacing the grubscrews/setscrews with longer ones.

What are your fittings made from?

Our Tubeclamp fittings are made from Galvanised Steel. Alternatively you can check out of range of Aluminium fittings, or consider having your fittings powder coated.

Where can i find size specifications for each fitting?

You can easily locate size diagrams for most fittings in the example images provided for each product. These diagrams provide approximate measurements for each fitting size.
Installation Guide
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Basic Install Guide for Tubeclamp Fittings

Illustration of a box in front of a globe

Australia Wide Shipping

You can choose to pick up your order from one of our stores or have it delivered anywhere in Australia. Orders placed before 10 AM on weekdays ship the same day; those after 10 AM or on public holidays will be sent the next business day.
Illustration of a box with a 'return' arrow in front

Our Return Policy

Tubeclamp allows returns of unused items in good condition within 5 days of purchase, but a handling or restocking fee of up to 20% may apply. Customers can exchange returned items for similar value products, though some items like cut bars or modified products may not be returnable.

Skip welding and bending.

Tubeclamp fittings features our easy slip-on and tighten connection system which only requires an allen key, or hexbit to secure.This means you can avoid the hassle of welding or the high costs (and trial and error) of tube bending.
Black painted tube coat racks with clothes on display
Black painted tube fittings and bar with clothes on display and hanging from racks.

A completely modular system.

Tubeclamp fittings are fully modular and can be used in countless ways, including for handrails, guardrails, furniture, shelving, trolleys, carts, scaffolding, fencing, shade cloth systems, garden enclosures, and so much more.

Additionally, since they don't need welding for installation, you can easily take apart or uninstall your setup to repurpose the fittings for another project.

Built to last and engineered for strength.

Tubeclamp fittings are galvanised for durability and will last for years even when exposed to the elements. In addition, being forged from ductile cast iron our fittings are designed tested  and in-house to support upwards of 5,650N (575kg). 

Our fittings comply with Australian Standards AS 1832 (ISO 5922), and AS 4680.
Galvanised steel tube fitting flanges on a grey background
Black painted tube fittings and square bar bookshelf

Charmingly Stylish.

Tubeclamp fittings and tubes have a simple yet attractive look. When you buy Tubeclamp Fittings or tubes, they come with a Galvanised Steel protective finish. 

However, to cater to a range of modern and traditional styles, we offer the option of sticking with the classic look or paying a bit extra to have your order powdercoated in a variety of contemporary colors of your choice.Choose from any colour from the Dulux Powder Coating range.

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