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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Push-to-Connect Tube Fittings for Air
UN/UNF (SAE Straight)
Male Threads with Gasket
- Temperature Range: 0° to 170° F
- Tubing: Use with firm (Durometer 95A-45D) polyethylene plastic or polyurethane rubber
- Specifications Met: ISO 14743, except 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.
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.
For technical drawings and 3-D models, click on a part number.
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 | 00000 |
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, except plugs and straight connectors are 32° 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. UN/UNF (SAE Straight) threads are also known as O-ring boss threads.
For technical drawings and 3-D models, click on a part number.
(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 | Material | Gasket Material | Release Type | Max. Pressure | Each | |
Metric Threads | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/8" | M3 | 0.5 | Nickel-Plated Brass | Buna-N Rubber | Sleeve | 230 psi @ 72° F | 00000000 | 000000 |
| 5/32" | M3 | 0.5 | Nickel-Plated Brass | Buna-N Rubber | Sleeve | 230 psi @ 72° F | 00000000 | 00000 |
| 3/16" | M3 | 0.5 | Nickel-Plated Brass | Buna-N Rubber | Sleeve | 230 psi @ 72° F | 00000000 | 00000 |
| 3mm | M3 | 0.5 | Nickel-Plated Brass | Buna-N Rubber | Sleeve | 230 psi @ 72° F | 00000000 | 00000 |
| 4mm | M3 | 0.5 | Nickel-Plated Brass | Buna-N Rubber | Sleeve | 230 psi @ 72° F | 00000000 | 00000 |
| 6mm | M3 | 0.5 | Nickel-Plated Brass | Buna-N Rubber | Sleeve | 230 psi @ 72° F | 00000000 | 00000 |