How to Identify and Measure Fittings
Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.
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About Rod Ends

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Nickel-Plated Brass Push-to-Connect Tube Fittings for Air


(SAE Straight) Male
Threads with Gasket
- For Use With: Air, Lubricated Air
- Temperature Range: 0° to 140° F
- Tubing: Fittings with Release Ring and Fittings with no Release Type: Use with firm or hard (Durometer 95A-60D) nylon plastic, polyethylene plastic or polyurethane rubber
Fittings with Release Sleeve: Use with firm or hard (Durometer 95A-60D) polyethylene plastic or polyurethane rubber
Made of nickel-plated brass, these fittings have better corrosion resistance than unplated brass fittings. Also known as instant fittings, they connect to tubing with a push, and an internal gripping ring and O-ring hold the tubing tight. To disconnect, push on the release ring or sleeve and pull the tubing out of the fitting.
Fittings with release sleeve are easier to disconnect than fittings with a release ring because they are seamless and won't collect dirt and debris.
Metric and UN/UNF (SAE Straight) male threads with gasket or thread sealant provide extra protection against leaks.

(SAE Straight) Male
Threads with Gasket
Fittings with intermittent swivel rotate 360° before and after installation as needed to allow movement in the system and to prevent kinking.
Release Sleeve | |||||||
---|---|---|---|---|---|---|---|
For Tube OD | Thread Size | Thread Pitch, mm | Material | Gasket Material | Max. Pressure | Each | |
Metric Threads | |||||||
1/8" | M3 | 0.5 | Nickel-Plated Brass | Buna-N Rubber | 230 psi @ 72° F | 00000000 | 000000 |
5/32" | M3 | 0.5 | Nickel-Plated Brass | Buna-N Rubber | 230 psi @ 72° F | 00000000 | 00000 |
3/16" | M3 | 0.5 | Nickel-Plated Brass | Buna-N Rubber | 230 psi @ 72° F | 00000000 | 00000 |
3mm | M3 | 0.5 | Nickel-Plated Brass | Buna-N Rubber | 230 psi @ 72° F | 00000000 | 00000 |
4mm | M3 | 0.5 | Nickel-Plated Brass | Buna-N Rubber | 230 psi @ 72° F | 00000000 | 00000 |
6mm | M3 | 0.5 | Nickel-Plated Brass | Buna-N Rubber | 230 psi @ 72° F | 00000000 | 00000 |
Push-to-Connect Tube Fittings for Air


UN/UNF (SAE Straight)
Male Threads with Gasket
- Temperature Range: 0° to 170° F, except polybutylene plastic fittings are 32° to 140° F
- Tubing: Use with firm (Durometer 95A-45D) polyethylene plastic or polyurethane rubber
- Specifications Met: ISO 14743, except cartridges and polybutylene plastic fittings
Insert tubing into these fittings and an internal gripping ring and O-ring hold the tubing tight. They are also known as instant fittings. To disconnect, push on the release ring and pull the tubing out of the fitting. Fittings have good corrosion resistance. Use them in low-pressure applications.
Identification rings (sold separately) snap over the release ring so you can color-code your lines.
Clips (sold separately) align and organize your tubing and fittings.
Metric male threads have either a gasket or a thread sealant to protect against leaks.


UN/UNF (SAE Straight)
Male Threads with Gasket
Fittings with intermittent swivel rotate 360° before and after installation as needed to allow movement in the system and to prevent kinking.
For Tube OD | Thread Size | Thread Pitch, mm | Tube Connection Material | Pipe Connection Material | Gasket Material | Color | Release Ring Color | Max. Pressure | Each | |
Metric Threads | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
3mm | M3 | 0.5 | Nylon Plastic | Nickel-Plated Brass | Buna-N Rubber | Black | Black | 290 psi @ 72° F | 00000000 | 000000 |
4mm | M3 | 0.5 | Nylon Plastic | Nickel-Plated Brass | Buna-N Rubber | Black | Black | 290 psi @ 72° F | 00000000 | 0000 |
Ball Joint Rod Ends


Made of steel, these rod ends generally handle higher loads than stainless steel, aluminum, and nylon rod ends. They don’t come lubricated, so you’ll need to lubricate during installation and on an ongoing basis.
Shank Thread Size | ID | Max. Ball Swivel | O'all Wd. | O'all Thick. | Shank Center Lg. | Shank Thread Lg. | Static Radial Load Cap., lbs. | Material | Shank Thread Direction | Each | |
Ball Joints | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
M3 × 0.5 mm | 3mm | 30° | 9.8mm | 6.4mm | 25mm | 14mm | Not Rated | Carbon Steel | Right Hand | 00000000 | 000000 |
Internally Threaded Ball Joint Rod Ends


Made of steel, these rod ends generally handle higher loads than stainless steel, aluminum, and nylon rod ends. They don’t come lubricated, so you’ll need to lubricate them during installation and on an ongoing basis.
Shank Thread Size | ID | Max. Ball Swivel | O'all Wd. | O'all Thick. | Shank Center Lg. | Shank Thread Lg. | Static Radial Load Cap., lbs. | Material | Shank Thread Direction | Each | |
Ball Joints | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
M3 × 0.5 mm | 3mm | 30° | 11mm | 4.9mm | 22mm | 10mm | Not Rated | Carbon Steel | Right Hand | 00000000 | 000000 |
Corrosion-Resistant Ball Joint Rod Ends


Made of stainless steel, these rod ends provide excellent corrosion resistance. A PTFE liner allows smooth ball rotation and eliminates the need for lubrication.
Shank Thread Size | ID | Max. Ball Swivel | O'all Wd. | O'all Thick. | Shank Center Lg. | Shank Thread Lg. | Static Radial Load Cap., lbs. | Material | Shank Thread Direction | Each | |
M3 × 0.5 mm | 3mm | 25° | 10mm | 5.2mm | 23mm | 15mm | Not Rated | 303 Stainless Steel | Right Hand | 00000000 | 000000 |
Heavy Duty Ball-Grip Positioning Arms

With strength for higher load capacities than other ball-grip positioning arms, these arms have a heavy duty construction. Ball-and-socket connections allow 360° positioning. The base, connectors, and links are hollow for routing wires, cables, and small hoses. Select a base, connectors, link, and plate or mount to build a complete arm.


Mounting plates require a base and a straight or tee connector to attach to a link. Machine vision camera mounting plates come with mounting hole patterns for specific brand cameras.
Mount. | ||||||||
---|---|---|---|---|---|---|---|---|
Lg. | Wd. | Max. Load Capacity, lbs. | Material | Color | Fasteners Included | Hole Pattern Compatibility | Each | |
2 3/4" | 2 1/2" | 35 | Anodized Aluminum | Blue | Yes | Cognex In-Sight 2000 Cognex In-Sight 8000 | 0000000 | 000000 |
3" | 2 1/2" | 35 | Anodized Aluminum | Blue | Yes | Cognex Dataman 300 Cognex Dataman 302 Cognex Dataman 360 Cognex Dataman 470 Cognex Dataman 474 Cognex Dataman 70 Cognex In-Sight 7000 Cognex In-Sight 7800 | 0000000 | 00000 |
Precision Single U-Joints


A good choice when you need accurate and repeatable motion, these U-joints have zero backlash (no play), so there’s no motion lost when your shafts change direction. This keeps machines running smoothly. They’re single U-joints, so they connect and transfer torque between shafts that are misaligned at an angle.
Your shafts’ misalignment will affect the speed and torque the U-joint will be able to transmit. The more the shafts are misaligned, the less speed and torque the U-joint will be able to transmit.
Pin-and-block U-joints work well in most applications since they handle higher torque at lower speeds than joints with ball bearings.
Acetal U-joints weigh less than metal U-joints. They protect components in your system from stray electrical currents by blocking the flow of electricity between your shafts.
U-joints that connect with set screws don’t require you to drill any holes.U-joints that don’t require lubrication are often used with optical devices and other sensitive equipment because they're less likely to attract dust and debris compared to lubricated U-joints. They’re also easier to maintain.
For Shaft | Torque | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Dia. | Dp. | Joint Dia. | O'all Lg. | Max. Operating Angle | Max. Speed, rpm | Max. Torque, in.-lbs. | 5° Operating Angle | 10° Operating Angle | Shaft Mount Type | Lubrication | Each | |
Pin-and-Block Joint | ||||||||||||
Acetal Plastic | ||||||||||||
1/8" | 3/8" | 5/16" | 1.07" | 45° | 1,000 | 4 | Not Rated | Not Rated | Set Screw | Not Required | 00000000 | 000000 |
3/16" | 1/2" | 7/16" | 1.48" | 45° | 1,000 | 17 | Not Rated | Not Rated | Set Screw | Not Required | 00000000 | 00000 |
1/4" | 5/8" | 9/16" | 1.82" | 45° | 1,000 | 40 | Not Rated | Not Rated | Set Screw | Not Required | 00000000 | 00000 |