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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How to Measure Threaded Pipe Size
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Low-Pressure Stainless Steel Threaded Pipe Fittings
Use these fittings in a low-pressure pipe line. 304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Fabrication: Heat Treated
- Specifications Met: ASTM A351
- Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
High-Pressure Plated Brass Threaded Pipe Fittings
The plating on these brass fittings creates a shiny finish and provides extra protection in corrosive environments. Fittings have the strength to handle high-pressure applications.
Nickel-plated brass fittings provide better corrosion resistance than unplated brass fittings.
- For Use With: Air, Natural Gas, Oil, Water
Nickel-Plated Brass | ||||
|---|---|---|---|---|
Pipe Size | Max. Pressure | Wye Angle | Each | |
BSPP Female | ||||
| 1/8 | 2,170 psi @ 72° F | 90° | 00000000 | 00000 |
- For Use With: Air, Natural Gas, Oil, Water
Nickel-Plated Brass | ||||
|---|---|---|---|---|
| Pipe Size | Max. Pressure | Wye Angle | Each | |
BSPT Male × BSPP Female | ||||
| 1/8 | 2,170 psi @ 72° F | 90° | 00000000 | 00000 |
Straight-Flow Rectangular Manifolds
Unlike other manifolds, which have an inlet on either end, these have one inlet on the opposite side from the outlets. This design allows fluid or air to follow a straight path, improving flow through your system. It also frees up the ends of the manifold, so you can mount it in corners and in narrow spaces. Manifolds are also known as headers. They have mounting holes, so you can mount from the top or side.
Anodized aluminum manifolds are the industry standard for the most common types of applications. They are lighter in weight than other metal manifolds and have good corrosion resistance. These manifolds are anodized for a black finish.
Zinc-plated steel manifolds have the best strength and durability of all our metal manifolds and can handle the highest pressures. Use them in noncorrosive environments.
Use a plug (sold separately) to close off any unused inlets and outlets.
- For Use With: Air, Water, Hydraulic Fluid
- Temperature Range: -10° to 200° F
- Maximum Pressure:
Air: 1,000 psi @ 72° F
Water: 1,000 psi @ 72° F
Hydraulic Fluid: 3,000 psi @ 72° F
- For Use With: Air, Water, Hydraulic Fluid
- Temperature Range: -10° to 200° F
- Maximum Pressure:
Air: 1,000 psi @ 72° F
Water: 5,000 psi @ 72° F
Hydraulic Fluid: 5,000 psi @ 72° F
Inlet | Outlet | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| No. of Outlets | Pipe Size | Dash Size | Pipe Size | Dash Size | Lg. | Wd. | Ht. | Outlet Ctr.-to-Ctr. | Each | |
Standard Outlet Spacing | ||||||||||
| 2 | 1/4 | 4 | 1/8 | 2 | 1 3/4" | 1" | 1" | 3/4" | 00000000 | 000000 |
| Pipe Size | Drive | Pressure Class | Max. Pressure | Each | |
Aluminum—NPT | |||||
|---|---|---|---|---|---|
| 1/16 | Hex | 150 | 150 psi @ 72° F | 00000000 | 00000 |
| 1/16 | External Hex | 150 | 150 psi @ 72° F | 00000000 | 0000 |
| 1/8 | Hex | 150 | 150 psi @ 72° F | 00000000 | 0000 |
| 1/8 | External Square | 150 | 150 psi @ 72° F | 000000000 | 0000 |
| 1/4 | Hex | 150 | 150 psi @ 72° F | 00000000 | 0000 |
| 1/4 | External Square | 150 | 150 psi @ 72° F | 000000000 | 0000 |
Steel—NPT | |||||
| 1/8 | Hex | 150 | 150 psi @ 72° F | 000000000 | 000 |
| 1/8 | Square | 150 | 150 psi @ 72° F | 000000000 | 000 |
| 1/8 | External Square | Not Rated | Not Rated | 000000000 | 000 |
| 1/4 | Hex | 150 | 150 psi @ 72° F | 000000000 | 000 |
| 1/4 | Square | 150 | 150 psi @ 72° F | 000000000 | 000 |
| 1/4 | External Square | Not Rated | Not Rated | 000000000 | 000 |
Push-to-Connect Tube Fittings for Air
- 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.
Fittings with PTFE thread sealant offer extra protection against leaks.
BSPP and UN/UNF (SAE Straight) male threads have a gasket to protect against leaks. UN/UNF (SAE Straight) threads are also known as O-ring boss threads.
Fittings with intermittent swivel rotate 360° before and after installation as needed to allow movement in the system and to prevent kinking.
| Pipe Size | For Tube OD | Pipe Connection Material | Tube Connection Material | Gasket Material | Color | Release Ring Color | Max. Pressure | Each | |
NPT Threads | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1/8 | 5/32" | Nickel-Plated Brass | Nylon Plastic | __ | Black | Black | 290 psi @ 72° F | 00000000 | 000000 |
| 1/8 | 1/4" | Nickel-Plated Brass | Nylon Plastic | __ | Black | Black | 290 psi @ 72° F | 00000000 | 00000 |
BSPP Threads | |||||||||
| 1/8 | 4mm | Nickel-Plated Brass | Nylon Plastic | Buna-N Rubber | Black | Black | 290 psi @ 72° F | 00000000 | 00000 |
| 1/8 | 6mm | Nickel-Plated Brass | Nylon Plastic | Buna-N Rubber | Black | Black | 290 psi @ 72° F | 00000000 | 00000 |
| 1/8 | 8mm | Nickel-Plated Brass | Nylon Plastic | Buna-N Rubber | Black | Black | 290 psi @ 72° F | 00000000 | 00000 |
BSPT Threads | |||||||||
| 1/8 | 4mm | Nickel-Plated Brass | Nylon Plastic | __ | Black | Black | 290 psi @ 72° F | 00000000 | 00000 |
| 1/8 | 6mm | Nickel-Plated Brass | Nylon Plastic | __ | Black | Black | 290 psi @ 72° F | 00000000 | 00000 |
| 1/8 | 8mm | Nickel-Plated Brass | Nylon Plastic | __ | Black | Black | 290 psi @ 72° F | 00000000 | 00000 |
Universal-Thread Push-to-Connect Tube Fittings for Air and Water
Threads
with Gasket
- Temperature Range: 0° to 175° F
- Tubing: Use with firm (Durometer 85A-100A) nylon plastic or polyurethane rubber
- Specifications Met: ISO 14743
Make lightweight connections without the hassle of matching the exact thread type—these fittings connect to NPT, NPTF, BSPP, BSPT, and other universal threads. With a nylon body and nickel-plated brass threads, these fittings are lighter than most metal fittings, and withstand corrosion better than plain brass threads. They also have a reusable gasket to guard against leaks. Connect the tube ends to tubing with a push, and an internal gripping ring and O-ring hold the tubing tight. To disconnect them, push the release ring and pull the tubing out of the fitting. These fittings are sometimes known as instant fittings. All meet ISO 14743, which is an international standard for push-to-connect fittings for plastic tubing.
Threads
with Gasket
Release Ring | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | For Tube OD | Pipe Connection Material | Tube Connection Material | Gasket Material | Color | Material | Color | Maximum Pressure | Each | |
BSPP, BSPT, NPT, NPTF, Universal Threads | ||||||||||
| 1/8 | 5/32" | Nickel-Plated Brass | Nylon Plastic | Buna-N Rubber | Black | Plastic | Blue | 250 psi @ 72° F | 0000000 | 00000 |
| 1/8 | 1/4" | Nickel-Plated Brass | Nylon Plastic | Buna-N Rubber | Black | Plastic | Blue | 250 psi @ 72° F | 0000000 | 0000 |
| 1/8 | 5/16" | Nickel-Plated Brass | Nylon Plastic | Buna-N Rubber | Black | Plastic | Blue | 250 psi @ 72° F | 0000000 | 0000 |
| 1/8 | 4mm | Nickel-Plated Brass | Nylon Plastic | Buna-N Rubber | Black | Plastic | Black | 250 psi @ 72° F | 00000000 | 0000 |
| 1/8 | 6mm | Nickel-Plated Brass | Nylon Plastic | Buna-N Rubber | Black | Plastic | Black | 250 psi @ 72° F | 00000000 | 0000 |
| 1/8 | 8mm | Nickel-Plated Brass | Nylon Plastic | Buna-N Rubber | Black | Plastic | Black | 250 psi @ 72° F | 00000000 | 0000 |
Threads
with Gasket
Release Ring | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | For Tube OD | Pipe Connection Material | Tube Connection Material | Gasket Material | Color | Material | Color | Maximum Pressure | Each | |
BSPP, BSPT, NPT, NPTF, Universal Threads | ||||||||||
| 1/8 | 5/32" | Nickel-Plated Brass | Nylon Plastic | Buna-N Rubber | Black | Plastic | Blue | 250 psi @ 72° F | 0000000 | 000000 |
| 1/8 | 1/4" | Nickel-Plated Brass | Nylon Plastic | Buna-N Rubber | Black | Plastic | Blue | 250 psi @ 72° F | 00000000 | 00000 |
| 1/8 | 4mm | Nickel-Plated Brass | Nylon Plastic | Buna-N Rubber | Black | Plastic | Black | 250 psi @ 72° F | 00000000 | 00000 |
| 1/8 | 6mm | Nickel-Plated Brass | Nylon Plastic | Buna-N Rubber | Black | Plastic | Black | 250 psi @ 72° F | 00000000 | 00000 |
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.
Fittings with thread sealant offer extra protection against leaks.
Release Ring | |||||||
|---|---|---|---|---|---|---|---|
| Pipe Size | For Tube OD | Material | Gasket Material | Max. Pressure | Features | Each | |
NPT Threads | |||||||
| 1/8 | 1/4" | Nickel-Plated Brass | __ | 230 psi @ 72° F | Thread Sealant | 000000000 | 000000 |
BSPP Threads | |||||||
| 1/8 | 4mm | Nickel-Plated Brass | Buna-N Rubber | 250 psi @ 72° F | __ | 00000000 | 00000 |
| 1/8 | 6mm | Nickel-Plated Brass | Buna-N Rubber | 250 psi @ 72° F | __ | 00000000 | 00000 |
Moisture-Resistant Push-to-Connect Tube Fittings for Air and Water
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.
Fittings with thread sealant offer extra protection against leaks.
- For Use With: Air, Lubricated Air, Water
- Temperature Range: 32° to 100° F
- Tubing: Use with firm (Durometer 90A-95A) nylon plastic or polyurethane rubber
Fittings with intermittent swivel rotate 360° before and after installation as needed to allow movement in the system and to prevent kinking.
Release Ring | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | For Tube OD | Tube Connection Material | Color | Material | Color | Max. Pressure | Mount Type | Mounting Fasteners Included | Features | Choose a Pipe Connection Material | Each | |
NPT Threads | ||||||||||||
| 1/8 | 1/8" | Polybutylene Plastic | Gray | Plastic | Orange | 140 psi @ 72° F | Screw On | No | Acrylic Thread Sealant | 00000000 | 00000 | |
| 1/8 | 5/32" | Polybutylene Plastic | Gray | Plastic | Orange | 140 psi @ 72° F | Screw On | No | Acrylic Thread Sealant | 00000000 | 0000 | |
| 1/8 | 3/16" | Polybutylene Plastic | Gray | Plastic | Orange | 140 psi @ 72° F | Screw On | No | Acrylic Thread Sealant | 00000000 | 0000 | |
| 1/8 | 1/4" | Polybutylene Plastic | Gray | Plastic | Orange | 140 psi @ 72° F | Screw On | No | Acrylic Thread Sealant | 00000000 | 0000 | |
| 1/8 | 5/16" | Polybutylene Plastic | Gray | Plastic | Orange | 140 psi @ 72° F | Screw On | No | Acrylic Thread Sealant | 00000000 | 0000 | |
BSPT Threads | ||||||||||||
| 1/8 | 4mm | Polybutylene Plastic | Gray | Plastic | Gray | 140 psi @ 72° F | Screw On | No | Acrylic Thread Sealant | 00000000 | 0000 | |
| 1/8 | 6mm | Polybutylene Plastic | Gray | Plastic | Gray | 140 psi @ 72° F | Screw On | No | Acrylic Thread Sealant | 00000000 | 0000 | |
| 1/8 | 8mm | Polybutylene Plastic | Gray | Plastic | Gray | 140 psi @ 72° F | Screw On | No | Acrylic Thread Sealant | 00000000 | 0000 | |
Universal-Thread Moisture-Resistant
Push-to-Connect Tube Fittings for Air and Water
Threads
with Gasket
- Temperature Range: 32° to 100° F
- Tubing: Use with firm (Durometer 90A-95A) nylon plastic or polyurethane rubber
The threads on these fittings mate with NPT, NPTF (Dryseal), BSPT, and BSPP threads. The male threads have a gasket to protect against leaks. Fittings are moisture and corrosion resistant, so they’re good for water and humid 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.
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 Ring | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | For Tube OD | Pipe Material | Tube Material | Gasket Material | Material | Color | Max. Pressure | Swivel Type | Mount Type | Mounting Fasteners Included | Each | |
| 1/8 | 1/8" | Polybutylene Plastic | Brass | 304 Stainless Steel, Buna-N Rubber | Plastic | Orange | 140 psi @ 72° F | Intermittent | Screw On | No | 000000000 | 00000 |
| 1/8 | 5/32" | Polybutylene Plastic | Brass | 304 Stainless Steel, Buna-N Rubber | Plastic | Orange | 140 psi @ 72° F | Intermittent | Screw On | No | 000000000 | 0000 |
| 1/8 | 1/4" | Polybutylene Plastic | Brass | 304 Stainless Steel, Buna-N Rubber | Plastic | Orange | 140 psi @ 72° F | Intermittent | Screw On | No | 000000000 | 0000 |
| 1/8 | 5/16" | Polybutylene Plastic | Brass | 304 Stainless Steel, Buna-N Rubber | Plastic | Orange | 140 psi @ 72° F | Intermittent | Screw On | No | 000000000 | 0000 |
| 1/8 | 4mm | Polybutylene Plastic | Brass | 304 Stainless Steel, Buna-N Rubber | Plastic | Gray | 140 psi @ 72° F | Intermittent | Screw On | No | 000000000 | 0000 |
| 1/8 | 6mm | Polybutylene Plastic | Brass | 304 Stainless Steel, Buna-N Rubber | Plastic | Gray | 140 psi @ 72° F | Intermittent | Screw On | No | 000000000 | 0000 |
| 1/8 | 8mm | Polybutylene Plastic | Brass | 304 Stainless Steel, Buna-N Rubber | Plastic | Gray | 140 psi @ 72° F | Intermittent | Screw On | No | 000000000 | 0000 |
Low-Temperature/High-Pressure D.O.T. Push-to-Connect Tube Fittings for Air
- Temperature Range: -40° to 200° F
- Tubing: Use with hard (Durometer 65D) nylon plastic
- Specifications Met:
Cartridges: D.O.T. FMVSS 571, SAE J2494-4, SAE J1131
All other fittings: D.O.T. FMVSS 571
Connect high-pressure brake lines with fittings that won’t crack in frigid temperatures. Often used on commercial trucks and trailers, these fittings meet Department of Transportation FMVSS 571 safety standards. Also known as instant fittings, they connect to tubing with a simple push, and an internal gripping ring and O-ring will hold the tubing tight. A built-in tube support slips inside the tubing to prevent it from collapsing. To disconnect, push on the release ring and pull the tubing out of the fitting. All have good corrosion resistance.
Fittings with intermittent swivel rotate 360° before and after installation as needed to allow movement in the system and to prevent kinking.
| Pipe Size | For Tube OD | Pipe Connection Material | Tube Connection Material | Color | Release Ring Material | Max. Pressure | Each | |
NPT Threads | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/8 | 1/4" | Brass | Nylon Plastic | Black | Brass | 250 psi @ 72° F | 00000000 | 000000 |
Weld-Spatter-Resistant Push-to-Connect Tube Fittings for Air and Water
- Temperature Range: 32° to 100° F
- Tubing: Use with firm or hard (Durometer 90A-50D) nylon plastic or polyurethane rubber
Made of flame-resistant material, these fittings are good for welding and other applications where sparks occur. 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.
Fittings with PTFE thread sealant offer extra protection against leaks.
| Pipe Size | For Tube OD, mm | Pipe Connection Material | Tube Connection Material | Color | Release Ring Color | Max. Pressure | Mount Type | Mounting Fasteners Included | Features | Each | |
BSPT Threads | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/8 | 6 | Brass | Polybutylene Plastic | Black | Green | 140 psi @ 72° F | Screw On | No | PTFE Thread Sealant | 00000000 | 00000 |
| For Tube OD | Material | Each | |
| 6mm | Polybutylene Plastic | 00000000 | 00000 |
Push-to-Connect Tube Fittings for Hot Drinking Water
- Temperature Range: 35° to 200° F
- Tubing: Use with hard polyethylene plastic
- Specifications Met: NSF/ANSI 51, NSF/ANSI 61
Run hot water through these fittings at temperatures up to 200° F. 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. Fittings are nylon for excellent impact and abrasion resistance.
NPTF (Dryseal) threads are compatible with NPT threads.
Fittings with intermittent swivel rotate 360° before and after installation as needed to allow movement in the system and to prevent kinking.
| Pipe Size | For Tube OD | Material | Color | Release Ring Color | Max. Pressure | Each | |
NPTF Threads | |||||||
|---|---|---|---|---|---|---|---|
| 1/8 | 1/4" | Nylon Plastic | White | Gray | 230 psi @ 72° F | 00000000 | 00000 |