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🔧⚙️ Metal Pneumatic Air Line Fittings Set – 8-Size Straight Tube Union Connectors (4–16mm) for Air Hose Repairs, Pneumatic Systems & Workshop Projects 🛠️

🔧⚙️ Metal Pneumatic Air Line Fittings Set – 8-Size Straight Tube Union Connectors (4–16mm) for Air Hose Repairs, Pneumatic Systems & Workshop Projects 🛠️

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🔧⚙️ Metal Pneumatic Air Line Fittings Set – 8-Size Straight Tube Union Connectors (4–16mm) for Air Hose Repairs, Pneumatic Systems & Workshop Projects 🛠️

🔧⚙️ Metal Pneumatic Air Line Fittings Set – 8-Size Straight Tube Union Connectors (4–16mm) for Air Hose Repairs, Pneumatic Systems & Workshop Projects 🛠️

Regular price $26.99
Regular price $26.99 Sale price
SAVE Sold out
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SMALL CONNECTIONS. BIG DIFFERENCE.

Need To Join Two Air Lines? Start With The Right Fitting.

Missing the right connector can bring a pneumatic project to a halt. Keep a range of straight metal fittings ready for connecting compatible tubing and tackling workshop air-line jobs.

Straight metal pneumatic connector joining two yellow air tubes
MADE FOR PRACTICAL AIR-LINE PROJECTS

A Small Part That Keeps Your Setup Moving.

A straightforward connection, multiple fitting sizes and metal construction in one useful assortment.

🔗

Straight Tube Connection

Join compatible pneumatic tubing in a straight-line arrangement.

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Metal Fitting Bodies

Metal construction with visible hexagonal wrench flats.

📏

Multiple Sizes

Choose the fitting that matches the outside diameter of your tubing.

Close-up of silver pneumatic union connecting two yellow air tubes
01 · STRAIGHT-THROUGH CONNECTION

One Simple Piece Between Two Lines.

Designed for connecting matching tubes in line, these unions are a useful part to keep on hand for compatible pneumatic assembly and maintenance work.

Detailed close-up of metallic straight pneumatic tube connectors showing round openings and hexagonal flats
02 · METAL CONSTRUCTION

Built Around A Practical Shape.

The straight-through body, accessible hexagonal surfaces and tube openings make the fitting easy to identify and match with your assembly requirements.

Eight different straight metal pneumatic air line connector sizes arranged on a workbench
03 · MULTIPLE TUBING SIZES

Different Lines Need Different Fittings.

Keep a selection of connector sizes together for projects involving different tubing diameters. Match the fitting to the tube rather than forcing an incorrect connection.

SIZE OPTIONS

Eight Sizes For Your Workbench.

Refer to the marked sizes when comparing your air-line tubing.

4mm
5mm
6mm
8mm
10mm
12mm
14mm
16mm

Choose according to the tubing outside diameter and the fitting's actual dimensional specification. Also verify tubing material, wall thickness and operating requirements.

Metal straight pneumatic tube fitting and yellow tubing showing the fit and connection area
04 · FITMENT MATTERS

Measure First. Connect With Confidence.

Check your tubing specifications before installation. A correctly selected fitting starts with the right tube diameter and compatible connection design.

Close view of metal pneumatic connectors in several different sizes showing construction details
05 · EASY TO IDENTIFY

Find The Fitting You Need.

Organize different connector sizes in your parts drawer or workshop kit, so the right option is easier to locate when you're planning an air-line connection.

Assorted metallic pneumatic air line fittings laid out on a wooden workshop bench
06 · WORKSHOP READINESS

Be Ready For The Next Air-Line Job.

A useful addition for a repair bench, DIY workspace or suitable pneumatic equipment setup. Keeping matching spare fittings nearby helps you prepare for future maintenance.

Metal pneumatic fitting assortment showing the available one-set and two-set options
07 · CHOOSE YOUR SET

One For The Job. Or More For Your Toolkit.

Select one fitting assortment for your current project or two assortments when you want additional parts available for the workshop.

AVAILABLE OPTIONS

Choose Your Set Quantity.

Select the quantity that best matches your workshop needs.

1 SET One Fitting Assortment
2 SETS Two Fitting Assortments
BEFORE INSTALLATION

Three Things To Check First.

Select and install fittings according to the requirements of your specific pneumatic system.

01

Measure The Tube

Verify the tube's outside diameter and material.

02

Confirm Compatibility

Check the fitting's dimensions, pressure rating and assembly requirements.

03

Install & Inspect

Depressurize the system, follow the installation instructions and check for leaks before use.

PRODUCT DETAILS

Specifications.

Key product characteristics and purchase options.

Product Type Metal Pneumatic Air Line Fittings
Connection Design Straight Tube-to-Tube Union
Body Construction Metal
Exterior Details Hexagonal Flats & Cylindrical Openings
Illustrated Sizes 4 / 5 / 6 / 8 / 10 / 12 / 14 / 16 mm
Set Quantity 1 Set / 2 Sets
Application Compatible Pneumatic Air-Line Connections
Fit Requirement Match Tubing & Equipment Specifications
Finish Metallic Silver; Smallest Size Shown in Gold Tone
Package According to Selected Set Quantity

Important: Operating pressure, temperature limits, exact alloy composition, sealing performance and tubing compatibility are not specified in the available product information. Confirm these values with the supplier before installing fittings in a pressurized system.

GOOD TO KNOW

Frequently Asked Questions.

Helpful answers before selecting fittings for your pneumatic tubing.

What are these metal air-line fittings used for?
They are straight union connectors intended to join compatible sections of pneumatic air tubing in line.
What sizes are shown in the set?
The product images identify eight sizes: 4, 5, 6, 8, 10, 12, 14 and 16 mm. Verify the corresponding tube dimensions before ordering.
How do I choose the correct fitting size?
Measure the outside diameter of your tube, then compare it with the fitting specifications. Also confirm the tubing material and connection requirements.
Can I connect two sections of pneumatic tubing?
Yes, provided both tube ends and the selected fitting are compatible with your application. Install according to the fitting manufacturer's instructions.
Are these made from metal?
Yes. The product listing identifies metal bodies with hexagonal flats and straight-through openings.
Will these fit any air hose?
Not necessarily. The tube diameter, material, wall thickness and connection type must match the fitting. These are not universal connectors for every hose.
Can I use these with an air compressor?
They may be suitable for a compatible pneumatic setup, but confirm the fitting's pressure rating and tubing specifications against your compressor system before installation.
What is the difference between 1 Set and 2 Sets?
The options refer to the quantity of fitting assortments supplied: one assortment or two assortments.
Are the fittings reusable?
Reuse depends on the fitting design, condition and manufacturer's instructions. Inspect sealing and gripping components before considering reuse.
Can I use these for water pipes?
Water-service compatibility has not been verified. Use only for applications supported by the manufacturer's material, pressure and sealing specifications.
What is the maximum operating pressure?
A verified maximum pressure rating is not provided in the listing. Confirm the specified working pressure with the supplier before use.
How do I install a fitting?
First isolate and depressurize the line. Follow the fitting manufacturer's assembly instructions for the correct tubing preparation, connection method and leak checks.
Do I need any special tools?
Tool requirements depend on the connector's assembly mechanism and your system. Use appropriate tools as specified by the manufacturer and avoid overtightening.
What should I check after installation?
Inspect the connection, ensure the tube is properly seated and carry out the manufacturer's recommended leak and pressure checks before returning the pneumatic system to service.
Do the yellow air tubes come with the set?
The yellow tubes are shown to demonstrate the connections. The available listing describes a metal fitting assortment; tubing is not confirmed as included.
GET YOUR AIR-LINE TOOLKIT READY

The Right Connection Starts With The Right Fit.

Keep a practical assortment of metal straight unions on hand for your next compatible pneumatic connection or workshop project.

CHOOSE YOUR FITTING SET ↑
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