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 Precision Flow-Adjustment Valves
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About On/Off Valves
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Tight-Seal Plastic Barbed Tube Fittings for Air and Water
Minimize leaks in your line—these fittings have a single barb that creates a smooth clamping surface for extra-tight connections. Fittings are nylon for excellent impact and abrasion resistance.
For technical drawings and 3-D models, click on a part number.

- Temperature Range: See table
- Tubing: Use with firm (Durometer 75A-80A) polyurethane rubber or PVC plastic
- Clarity: Black: Opaque; White: Opaque; Off-White: Semi-Clear
For Tube ID | Thread Size | Material | Max. Pressure | Temp. Range, °F | Pkg. Qty. | Choose a Color | Pkg. | |
UNF Threads | ||||||||
---|---|---|---|---|---|---|---|---|
1/16" | 10-32 | Nylon Plastic | Not Rated | -50° to 275° | 10 | 0000000 | 000000 | |
3/32" | 10-32 | Nylon Plastic | Not Rated | -50° to 275° | 10 | Off-White | 00000000 | 00000 |
1/8" | 10-32 | Nylon Plastic | Not Rated | -50° to 275° | 10 | 0000000 | 00000 | |
1/8" | 1/4"-28 | Nylon Plastic | Not Rated | -50° to 275° | 10 | White | 00000000 | 00000 |
Tight-Seal Moisture-Resistant Plastic Barbed Tube Fittings for Air and Water
- Temperature Range: -20° to 280° F
- Tubing: Use with firm or soft (Durometer 50A-90A) polyurethane rubber or PVC plastic
- Specifications Met: FDA Compliant 21 CFR 177.2470
Fittings have a single barb that creates a smooth clamping surface for extra-tight connections that minimize leaks. Made of acetal, they won’t absorb water and lose strength, even in high-humidity environments.
For technical drawings and 3-D models, click on a part number.

For Tube ID | Thread Size | Material | Color | Clarity | Max. Pressure | Each | |
UNF Threads | |||||||
---|---|---|---|---|---|---|---|
1/16" | 10-32 | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 00000 |
1/8" | 10-32 | Acetal Plastic | White | Semi-Clear | Not Rated | 0000000 | 0000 |
1/8" | 1/4"-28 | Acetal Plastic | White | Semi-Clear | Not Rated | 00000000 | 0000 |
3/16" | 1/4"-28 | Acetal Plastic | White | Semi-Clear | Not Rated | 00000000 | 0000 |
Grease Fitting Adapters
When the size or thread type of a fitting doesn't match an existing opening, use these adapters to make the connection.
Zinc-plated steel adapters have mild corrosion resistance. SAE-LT threads are tapered but designed to be installed into a 1/4"-28 straight-thread UNF hole.
For technical drawings and 3-D models, click on a part number.

Connection | |||||
---|---|---|---|---|---|
Male | Female | Material | Pkg. Qty. | Pkg. | |
Adapters | |||||
SAE-LT 1/4"-28 | UNF 1/4"-28 | Zinc-Plated Steel | 5 | 0000000 | 00000 |
Fast-Acting Panel-Mount Threaded On/Off Valves

Start or stop flow with the flip of a toggle switch or the push of a button. These valves are often used in testing and sampling applications where you need to dispense a small amount of liquid. They fit through a cutout, so the body of the valve stays safe inside your instrumentation panel.
Nickel-plated brass valves resist corrosion better than plain brass valves.
Manual-return valves stay open until you flip the toggle off. Since they don't need to be held open, they’re often used to dispense larger samples than spring-return valves. It’s also easy to check if these valves are open or not based on the toggle’s position. Spring-return valves automatically close when you release the toggle or push button. They’re ideal for intermittent use and precise flow control to prevent spills.
Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
For technical drawings and 3-D models, click on a part number.


- Valve Type: Stem
- For Use With: See table
- Seal Material: See table
Pipe Size | Thread Size | Flow Coefficient (Cv) | Max. Pressure | Temperature Range, °F | Valve Starting Position | Return Actuation | Toggle Material | Seal Material | Port-to-Port Lg. | Panel Cutout Dia. | For Use With | Each | |
UNF Female × UNF Female | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
__ | 10-32 | 6.8 | 150 psi @ 70° F | 35° to 230° | Normally Closed | Spring | Plastic | Buna-N Rubber | 5/16" | 15/32" | Water, Oil, Air | 0000000 | 000000 |
__ | 10-32 | 7.3 | 150 psi @ 70° F | 35° to 230° | __ | Manual | Metal | Buna-N Rubber | 5/16" | 15/32" | Water, Oil, Air | 0000000 | 00000 |
NPT Male × UNF Female | |||||||||||||
1/8 | 10-32 | 7.3 | 150 psi @ 70° F | 35° to 230° | __ | Manual | Metal | Buna-N Rubber | 5/16" | 15/32" | Water, Oil, Air | 0000000 | 00000 |
1/8 | 10-32 | 8 | 150 psi @ 70° F | 35° to 230° | __ | Manual | Plastic | Buna-N Rubber | 5/16" | 15/32" | Water, Oil, Air | 0000000 | 00000 |
1/8 | 10-32 | 8 | 150 psi @ 70° F | 35° to 230° | Normally Closed | Spring | Metal | Buna-N Rubber | 5/16" | 15/32" | Water, Oil, Air | 0000000 | 00000 |

- Valve Type: Stem
- For Use With: Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon
- Seal Material: Buna-N Rubber Seal
Thread Size | Flow Coefficient (Cv) | Max. Pressure | Temperature Range, °F | Valve Starting Position | Return Actuation | Push-Button Material | Port-to-Port Lg. | Panel Cutout Dia. | Each | |
UNF Female × UNF Female | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
10-32 | 0.1 | 125 psi @ 70° F | -40° to 180° | Normally Closed | Spring | Plastic | 1/4" | 15/32" | 0000000 | 000000 |
Fast-Acting Threaded On/Off Valves
Push a button or flip a toggle switch to start or stop flow. Often used in testing and sampling, these valves are useful when you need to dispense a small amount of liquid.
Nickel-plated brass valves resist corrosion better than plain brass valves.
Push-button valves automatically open or close when you take your finger off the button. They’re ideal for intermittent use and applications where you want to monitor flow closely to avoid spills. The button is colored to make it easy to tell different valves apart. Normally open valves close when you push their button. Normally closed valves open when you push their button.
Toggle valves stay open until you flip them closed. Since they don't need to be held open, they’re often used to dispense larger samples than push-button valves. You can see if these valves are open or not based on the toggle's position.
Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
For technical drawings and 3-D models, click on a part number.

with Compact
Push Button

with Mushroom
Push Button
- Valve Type: Stem
- For Use With: See table
- Seal Material: Buna-N Rubber
Thread Size | Flow Coefficient (Cv) | Max. Pressure | Temperature Range, °F | Port-to-Port Lg. | For Use With | Push-Button Color | Each | |
Compact Push Button | ||||||||
---|---|---|---|---|---|---|---|---|
Normally Closed | ||||||||
UNF Female × UNF Female | ||||||||
10-32 | 0.12 | 300 psi @ 180° F | 35° to 230° | 5/16" | Water, Oil, Air | Black | 0000000 | 000000 |
Mushroom Push Button | ||||||||
Normally Open | ||||||||
UNF Female × UNF Female | ||||||||
10-32 | 0.18 | 150 psi @ 180° F | 35° to 230° | 5/16" | Water, Oil, Air | Black | 0000000 | 00000 |
Normally Closed | ||||||||
UNF Female × UNF Female | ||||||||
10-32 | 0.12 | 300 psi @ 180° F | 35° to 230° | 5/16" | Water, Oil, Air | Black | 0000000 | 00000 |




- Valve Type: Stem
- For Use With: Air, Oil, Water
- Seal Material: Buna-N Rubber
Pipe Size | Thread Size | Flow Coefficient (Cv) | Max. Pressure | Temperature Range, °F | Port-to-Port Lg. | Toggle Color | Each | |
NPT Female × UNF Female | ||||||||
---|---|---|---|---|---|---|---|---|
1/8 | 10-32 | 0.15 | 125 psi @ 180° F | -25° to 180° | 5/16" | Black | 00000000 | 000000 |
NPT Female × UNF Male | ||||||||
1/8 | 10-32 | 0.15 | 125 psi @ 180° F | -25° to 180° | 9/16" | Black | 00000000 | 00000 |
NPT Male × UNF Female | ||||||||
1/8 | 10-32 | 0.15 | 125 psi @ 180° F | -25° to 180° | 5/16" | Black | 00000000 | 00000 |
NPT Male × UNF Male | ||||||||
1/8 | 10-32 | 0.15 | 125 psi @ 180° F | -25° to 180° | 9/16" | Black | 00000000 | 00000 |




- Valve Type: Stem
- For Use With: Air, Oil, Water
- Seal Material: Buna-N Rubber
Pipe Size | Thread Size | Flow Coefficient (Cv) | Max. Pressure | Temperature Range, °F | Port-to-Port Lg. | Push-Button Style | Push-Button Color | Each | |
Normally Closed | |||||||||
---|---|---|---|---|---|---|---|---|---|
NPT Female × UNF Female | |||||||||
1/8 | 10-32 | 0.15 | 125 psi @ 180° F | -25° to 180° | 5/16" | Compact | Black | 00000000 | 000000 |
NPT Female × UNF Male | |||||||||
1/8 | 10-32 | 0.15 | 125 psi @ 180° F | -25° to 180° | 9/16" | Compact | Black | 00000000 | 00000 |
NPT Male × UNF Female | |||||||||
1/8 | 10-32 | 0.15 | 125 psi @ 180° F | -25° to 180° | 5/16" | Compact | Black | 00000000 | 00000 |
NPT Male × UNF Male | |||||||||
1/8 | 10-32 | 0.15 | 125 psi @ 180° F | -25° to 180° | 9/16" | Compact | Black | 00000000 | 00000 |
Threaded Precision Flow-Adjustment Valves
Also known as needle valves, these adjust flow in small increments for metering, sampling, and other applications requiring fine flow control. Turn the handle to adjust flow. All valves have metal-to-metal seats that resist temperature fluctuations.
303 stainless steel valves are more corrosion resistant than brass and steel valves.
316 stainless steel valves have the best corrosion resistance.
Valves with packing have a nut that can be tightened to compress the packing if it leaks.
Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
For technical drawings and 3-D models, click on a part number.

- Valve Type: Needle
- For Use With: Water, Oil, Air, Argon, Helium, Krypton, Neon, Xenon
Thread Size | Flow Coefficient (Cv) | Max. Pressure | Temperature Range, °F | Packing Material | Port-to-Port Lg. | Each | |
303 Stainless Steel Body with Knob Handle | |||||||
---|---|---|---|---|---|---|---|
10-32 | 0.02 | 300 psi @ 70° F | 0° to 430° | Fluoroelastomer Rubber | 5/16" | 00000000 | 000000 |
316 Stainless Steel Body with Knob Handle | |||||||
10-32 | 0.02 | 300 psi @ 70° F | 0° to 430° | Fluoroelastomer Rubber | 5/16" | 00000000 | 00000 |