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.
More
Nickel-Plated Brass Push-to-Connect Tube Fittings for Air
- 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.
For technical drawings and 3-D models, click on a part number.
Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through your wall or panel to create an inlet or outlet.
Release Ring | |||||
|---|---|---|---|---|---|
| For Tube OD | Pipe Size | Material | Max. Pressure | Each | |
NPT Threads | |||||
| 1/4" | 1/4 | Nickel-Plated Brass | 230 psi @ 72° F | 000000000 | 000000 |
Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through your wall or panel to create an inlet or outlet.
Release Ring | ||||||
|---|---|---|---|---|---|---|
| For Tube OD | Material | Max. Pressure | For Hole Dia. | For Max. Wall Thick. | Each | |
| 1/8" | Nickel-Plated Brass | 230 psi @ 72° F | 7/16" | 13/32" | 000000000 | 000000 |
| 5/32" | Nickel-Plated Brass | 230 psi @ 72° F | 7/16" | 13/32" | 000000000 | 00000 |
| 3/16" | Nickel-Plated Brass | 230 psi @ 72° F | 1/2" | 13/32" | 000000000 | 00000 |
| 1/4" | Nickel-Plated Brass | 230 psi @ 72° F | 9/16" | 7/16" | 000000000 | 00000 |
| 5/16" | Nickel-Plated Brass | 230 psi @ 72° F | 11/16" | 7/16" | 000000000 | 00000 |
| 3/8" | Nickel-Plated Brass | 230 psi @ 72° F | 3/4" | 1/2" | 000000000 | 00000 |
| 1/2" | Nickel-Plated Brass | 230 psi @ 72° F | 7/8" | 9/16" | 000000000 | 00000 |
| 4mm | Nickel-Plated Brass | 230 psi @ 72° F | 10.5mm | 10.5mm | 000000000 | 00000 |
| 6mm | Nickel-Plated Brass | 230 psi @ 72° F | 14.5mm | 10.5mm | 000000000 | 00000 |
| 8mm | Nickel-Plated Brass | 230 psi @ 72° F | 16.5mm | 11.5mm | 000000000 | 00000 |
| 10mm | Nickel-Plated Brass | 230 psi @ 72° F | 20.5mm | 13mm | 000000000 | 00000 |
| 12mm | Nickel-Plated Brass | 230 psi @ 72° F | 24.5mm | 14.5mm | 000000000 | 00000 |
Moisture-Resistant Push-to-Connect Tube Fittings for Air and Water
- For Use With: Air, Lubricated Air, Water,
except Manifolds with Swivel: Air, Water - Temperature Range: 32° to 100° F
- Tubing: Use with firm (Durometer 90A-95A) nylon plastic or polyurethane rubber
These fittings won’t absorb moisture, so they’re good for water and high-humidity air applications. 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 and pull the tubing out of the fitting. They have good corrosion resistance.
Nickel-plated brass fittings have better corrosion resistance than unfinished brass fittings.
For technical drawings and 3-D models, click on a part number.
Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through your wall or panel to create an inlet or outlet.
Release Ring | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Tube OD | Pipe Size | Material | Color | Max. Pressure | For Hole Dia. | For Max. Wall Thick. | Choose a Material | Each | |
NPT Threads | |||||||||
| 1/8" | 1/4 | Plastic | Orange | 140 psi @ 72° F | 17/32" | __ | 00000000 | 00000 | |
| 5/32" | 1/4 | Plastic | Orange | 140 psi @ 72° F | 17/32" | __ | 00000000 | 0000 | |
| 3/16" | 1/8 | Plastic | Orange | 140 psi @ 72° F | 19/32" | __ | 00000000 | 0000 | |
| 1/4" | 1/4 | Plastic | Orange | 140 psi @ 72° F | 19/32" | __ | 00000000 | 0000 | |
| 5/16" | 3/8 | Plastic | Orange | 140 psi @ 72° F | 25/32" | __ | 00000000 | 00000 | |
| 3/8" | 3/8 | Plastic | Orange | 140 psi @ 72° F | 29/32" | __ | 00000000 | 00000 | |
| 1/2" | 3/8 | Plastic | Orange | 140 psi @ 72° F | 1 1/32" | __ | 00000000 | 00000 | |
| 1/2" | 1/2 | Plastic | Orange | 140 psi @ 72° F | 1 1/32" | __ | 00000000 | 00000 | |
BSPT Threads | |||||||||
| 4mm | 1/8 | Plastic | Gray | 140 psi @ 72° F | 13mm | 7mm | 00000000 | 0000 | |
| 4mm | 1/4 | Plastic | Gray | 140 psi @ 72° F | 13mm | 7mm | 00000000 | 0000 | |
| 6mm | 1/8 | Plastic | Gray | 140 psi @ 72° F | 15mm | 7mm | 00000000 | 0000 | |
| 6mm | 1/4 | Plastic | Gray | 140 psi @ 72° F | 15mm | 7mm | 00000000 | 0000 | |
| 6mm | 3/8 | Plastic | Gray | 140 psi @ 72° F | 15mm | 7mm | 00000000 | 0000 | |
| 8mm | 1/8 | Plastic | Gray | 140 psi @ 72° F | 17mm | 7mm | 00000000 | 00000 | |
| 8mm | 1/4 | Plastic | Gray | 140 psi @ 72° F | 17mm | 7mm | 00000000 | 00000 | |
| 8mm | 3/8 | Plastic | Gray | 140 psi @ 72° F | 17mm | 7mm | 00000000 | 00000 | |
| 10mm | 1/4 | Plastic | Gray | 140 psi @ 72° F | 21mm | 7mm | 00000000 | 0000 | |
| 10mm | 3/8 | Plastic | Gray | 140 psi @ 72° F | 21mm | 7mm | 00000000 | 00000 | |
| 12mm | 3/8 | Plastic | Gray | 140 psi @ 72° F | 23mm | 7mm | 00000000 | 00000 | |
| 12mm | 1/2 | Plastic | Gray | 140 psi @ 72° F | 23mm | 7mm | 00000000 | 00000 | |
| 16mm | 3/8 | Plastic | Gray | 140 psi @ 72° F | 29mm | 7mm | 00000000 | 00000 | |
| 16mm | 1/2 | Plastic | Gray | 140 psi @ 72° F | 29mm | 7mm | 00000000 | 00000 | |
Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through your wall or panel to create an inlet or outlet.
Release Ring | ||||||||
|---|---|---|---|---|---|---|---|---|
| For Tube OD | Material | Color | Max. Pressure | For Hole Dia. | For Max. Wall Thick. | Choose a Material | Each | |
| 1/8" | Plastic | Orange | 140 psi @ 72° F | 17/32" | 7/16" | 00000000 | 00000 | |
| 5/32" | Plastic | Orange | 140 psi @ 72° F | 17/32" | 7/16" | 00000000 | 0000 | |
| 3/16" | Plastic | Orange | 140 psi @ 72° F | 19/32" | 7/16" | 00000000 | 0000 | |
| 1/4" | Plastic | Orange | 140 psi @ 72° F | 19/32" | 7/16" | 00000000 | 0000 | |
| 5/16" | Plastic | Orange | 140 psi @ 72° F | 25/32" | 7/16" | 00000000 | 0000 | |
| 3/8" | Plastic | Orange | 140 psi @ 72° F | 29/32" | 7/16" | 00000000 | 00000 | |
| 1/2" | Plastic | Orange | 140 psi @ 72° F | 1 1/32" | 7/16" | 00000000 | 00000 | |
| 4mm | Plastic | Gray | 140 psi @ 72° F | 13mm | 11mm | 000000000 | 0000 | |
| 6mm | Plastic | Gray | 140 psi @ 72° F | 15mm | 11mm | 000000000 | 0000 | |
| 8mm | Plastic | Gray | 140 psi @ 72° F | 17mm | 11mm | 000000000 | 0000 | |
| 10mm | Plastic | Gray | 140 psi @ 72° F | 21mm | 11mm | 000000000 | 00000 | |
| 12mm | Plastic | Gray | 140 psi @ 72° F | 23mm | 11mm | 000000000 | 00000 | |
| 16mm | Plastic | Gray | 140 psi @ 72° F | 29mm | 11mm | 000000000 | 00000 | |
Aluminum Low-Pressure Barbed Tube Fittings for Air and Water
- For Use With: Air, Lubricated Air, Water
- Temperature Range: -40° to 230° F
- Tubing: Use with hard (Durometer 75A-60D) EVA plastic, polyethylene plastic, polyurethane rubber or PVDF plastic
Made of aluminum, these fittings are lighter in weight than other metal barbed tube fittings and have good corrosion resistance. The barb grips onto tubing, providing a secure hold with no clamp required.
For technical drawings and 3-D models, click on a part number.
Through-wall fittings are also known as bulkhead couplings and panel-mount couplings; they mount through your wall or panel to create an inlet or outlet.
| For Tube ID | Material | Max. Pressure | For Hole Dia. | For Max. Wall Thick. | Each | |
| 1/16" | Aluminum | 125 psi @ 72° F | 3/16" | 1/4" | 00000000 | 000000 |
| 1/8" | Aluminum | 125 psi @ 72° F | 1/4" | 5/16" | 00000000 | 00000 |
| 0.17" | Aluminum | 125 psi @ 72° F | 5/16" | 13/32" | 00000000 | 00000 |
| 1/4" | Aluminum | 125 psi @ 72° F | 3/8" | 13/32" | 00000000 | 00000 |
| 3/8" | Aluminum | 125 psi @ 72° F | 1/2" | 13/32" | 00000000 | 00000 |
| 1/2" | Aluminum | 125 psi @ 72° F | 3/4" | 53/64" | 00000000 | 00000 |
Plastic Compression Tube Fittings for Air
- For Use With: Air, Lubricated Air
- Temperature Range: -30° to 210° F
- Tubing: Use with firm or hard nylon plastic, polyethylene plastic or polypropylene plastic
Lighter in weight than their metal counterparts, these compression fittings are polypropylene. They have excellent impact and abrasion resistance. Fittings include a nut with a built-in sleeve (ferrule), so there’s no need to remove the nut for assembly. The sleeve compresses the tubing as you tighten the nut, creating a strong seal. Fittings are also known as flareless fittings.
Tube supports (sold separately) are recommended if you want to use the fittings with soft nylon, polypropylene, and polyethylene tubing to prevent the tube from collapsing.
For technical drawings and 3-D models, click on a part number.
Through-wall connectors mount through a panel or wall to create an inlet or outlet. They're also called bulkhead couplings and panel-mount couplings.
| For Tube OD | Material | Color | Max. Pressure | For Hole Dia. | For Max. Wall Thick. | Pkg. Qty. | Pkg. | |
| 1/4" | Polypropylene Plastic | White | 220 psi @ 72° F | 15/32" | 1/4" | 5 | 00000000 | 00000 |
| 5/16" | Polypropylene Plastic | White | 220 psi @ 72° F | 17/32" | 5/16" | 5 | 00000000 | 00000 |
| 3/8" | Polypropylene Plastic | White | 220 psi @ 72° F | 21/32" | 5/16" | 2 | 00000000 | 0000 |
| 1/2" | Polypropylene Plastic | White | 220 psi @ 72° F | 25/32" | 1/4" | 2 | 00000000 | 0000 |
| 3/4" | Polypropylene Plastic | White | 220 psi @ 72° F | 1 3/32" | 7/16" | 1 | 00000000 | 0000 |
| 6mm | Polypropylene Plastic | White | 220 psi @ 72° F | 7/16" | 17/64" | 5 | 00000000 | 00000 |
Nut | Sleeve | |||||||
|---|---|---|---|---|---|---|---|---|
| For Tube OD | Material | Color | Material | Color | Max. Pressure | Pkg. Qty. | Pkg. | |
| 1/4" | Polypropylene Plastic | White | Polypropylene Plastic | White | 220 psi @ 72° F | 10 | 00000000 | 00000 |
| 5/16" | Polypropylene Plastic | White | Polypropylene Plastic | White | 220 psi @ 72° F | 10 | 00000000 | 0000 |
| 3/8" | Polypropylene Plastic | White | Polypropylene Plastic | White | 220 psi @ 72° F | 10 | 00000000 | 0000 |
| 1/2" | Polypropylene Plastic | White | Polypropylene Plastic | White | 220 psi @ 72° F | 10 | 00000000 | 0000 |
| 3/4" | Polypropylene Plastic | White | Polypropylene Plastic | White | 220 psi @ 72° F | 5 | 00000000 | 0000 |
For Tube | Tube Support | ||||||
|---|---|---|---|---|---|---|---|
| OD | ID | Material | Color | Max. Pressure | Pkg. Qty. | Pkg. | |
| 1/4" | 3/16" | Polypropylene Plastic | White | 220 psi @ 72° F | 10 | 00000000 | 00000 |
| 5/16" | 3/16" | Polypropylene Plastic | White | 220 psi @ 72° F | 10 | 00000000 | 0000 |
| 3/8" | 1/4" | Polypropylene Plastic | White | 220 psi @ 72° F | 10 | 00000000 | 0000 |
| 1/2" | 3/8" | Polypropylene Plastic | White | 220 psi @ 72° F | 10 | 00000000 | 0000 |
Brass Compression Tube Fittings for Air and Water
- For Use With: Air, Lubricated Air, Water
- Temperature Range: See table
- Tubing: Use with firm or hard (Durometer 1A-95A or Rockwell 15T 1-15T 60) nylon plastic, polyethylene plastic, polypropylene plastic or polyurethane rubber
- Specifications Met: SAE J512, except metric sizes
A single sleeve (ferrule) compresses the tubing as you tighten the nut, creating a strong seal. The nut and sleeve are included. Fittings are also known as flareless fittings. They are brass for good corrosion resistance.
Tube supports (sold separately) are recommended if you want to use the fittings with soft polypropylene and polyethylene tubing to prevent the tube from collapsing.
Install plugs with a nut (sold separately) on the end of fittings to block the flow of air or water.
For technical drawings and 3-D models, click on a part number.
For Tube, mm | ||||||||
|---|---|---|---|---|---|---|---|---|
| OD | Wall Thick. | Material | Max. Pressure | Temp. Range, °F | For Hole Dia., mm | For Max. Wall Thick., mm | Each | |
| 4 | 1 | Brass | 2100 psi @ 72° F | -75° to 550° | 9 | 12 | 00000000 | 00000 |
| 6 | 1 | Brass | 2100 psi @ 72° F | -75° to 550° | 11 | 12.5 | 0000000 | 0000 |
| 8 | 1 | Brass | 1900 psi @ 72° F | -75° to 550° | 13.5 | 12.5 | 00000000 | 0000 |
| 10 | 1 | Brass | 1300 psi @ 72° F | -75° to 550° | 17.5 | 13 | 00000000 | 0000 |
| 12 | 1 | Brass | 1000 psi @ 72° F | -75° to 550° | 20 | 17 | 00000000 | 00000 |
- For Use With: See table
- Temperature Range: See table
- Tubing:
Tube supports for use with air and lubricated air: Use with firm or soft (Durometer 1A-95A) polyethylene plastic or polyurethane rubber
Tube supports for use with air, lubricated air, and water: Use with hard or firm (Rockwell 15T 1-15T 60) nylon plastic, polyethylene plastic, polypropylene plastic, or polyurethane rubber - Specifications Met: SAE J512, except metric sizes
For Tube | ||||||||
|---|---|---|---|---|---|---|---|---|
| OD | ID | For Use With | Tube Support Material | Max Pressure | Temp. Range, °F | Pkg. Qty. | Pkg. | |
| 4mm | 2mm | Air, Lubricated Air | Brass | 3300 psi @ 72° F | -65° to 250° | 25 | 000000000 | 000000 |
| Each | ||||||||
| 4mm | 2.7mm | Air, Lubricated Air, Water | Brass | 2100 psi @ 72° F | -75° to 550° | __ | 00000000 | 000 |
| 6mm | 4mm | Air, Lubricated Air, Water | Brass | 2100 psi @ 72° F | -75° to 550° | __ | 0000000 | 000 |
| 8mm | 6mm | Air, Lubricated Air, Water | Brass | 1900 psi @ 72° F | -75° to 550° | __ | 00000000 | 000 |
| 10mm | 8mm | Air, Lubricated Air, Water | Brass | 1300 psi @ 72° F | -75° to 550° | __ | 00000000 | 000 |
| 12mm | 9mm | Air, Lubricated Air, Water | Brass | 1000 psi @ 72° F | -75° to 550° | __ | 00000000 | 000 |
| 12mm | 10mm | Air, Lubricated Air, Water | Brass | 1000 psi @ 72° F | -75° to 550° | __ | 00000000 | 000 |
- For Use With: Air, Lubricated Air, Water
- Temperature Range: See table
- Tubing: Use with firm or hard (Durometer 1A-95A or Rockwell 15T 1-15T 60) nylon plastic, polyethylene plastic, polypropylene plastic or polyurethane rubber
- Specifications Met: SAE J512, except metric sizes
For Tube | ||||||
|---|---|---|---|---|---|---|
| OD | Wall Thick. | Nut Material | Max. Pressure | Temp. Range, °F | Each | |
| 4mm | 1mm | Brass | 2100 psi @ 72° F | -75° to 550° | 00000000 | 00000 |
| 6mm | 1mm | Brass | 2100 psi @ 72° F | -75° to 550° | 0000000 | 000 |
| 8mm | 1mm | Brass | 1900 psi @ 72° F | -75° to 550° | 00000000 | 000 |
| 10mm | 1mm | Brass | 1300 psi @ 72° F | -75° to 550° | 00000000 | 0000 |
| 12mm | 1mm | Brass | 1000 psi @ 72° F | -75° to 550° | 00000000 | 0000 |
- For Use With: Air, Lubricated Air, Water
- Temperature Range: See table
- Tubing: Use with firm or hard (Durometer 1A-95A or Rockwell 15T 1-15T 60) nylon plastic, polyethylene plastic, polypropylene plastic or polyurethane rubber
- Specifications Met: SAE J512, except metric sizes
For Tube | Sleeve | |||||
|---|---|---|---|---|---|---|
| OD | Wall Thick. | Material | Max. Pressure | Temp. Range, °F | Each | |
| 4mm | 1mm | Brass | 2100 psi @ 72° F | -75° to 550° | 00000000 | 00000 |
| 6mm | 1mm | Brass | 2100 psi @ 72° F | -75° to 550° | 0000000 | 000 |
| 8mm | 1mm | Brass | 1900 psi @ 72° F | -75° to 550° | 00000000 | 000 |
| 10mm | 1mm | Brass | 1300 psi @ 72° F | -75° to 550° | 00000000 | 000 |
| 12mm | 1mm | Brass | 1000 psi @ 72° F | -75° to 550° | 00000000 | 000 |