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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Precision Extreme-Pressure Stainless Steel Threaded Pipe Fittings
Made to tighter tolerances than other stainless steel pipe fittings, these are also known as instrumentation fittings. The male threads are rolled for extra strength in extreme-pressure applications. Fittings are commonly used to connect equipment in gas and hydraulic fluid lines. They are 316 stainless steel for excellent corrosion resistance.
- For Use With: Hydraulic Fluid, Liquid Nitrogen, Natural Gas, Steam, Water
- Specifications Met:
3/4 Pipe Size: ASME B1.20.1, ASME B31.3, ASTM A276, ASTM A479
All other sizes: ASME B1.20.1, ASME B31.1, ASME B31.3
316 Stainless Steel | ||||
|---|---|---|---|---|
Pipe Size | Max. Pressure | Max. Steam Pressure | Each | |
NPT Male | ||||
| 1/16 | 10,000 psi @ 72° F | 10,000 psi @ 300° F | 000000000 | 000000 |
- For Use With: Hydraulic Fluid, Liquid Nitrogen, Natural Gas, Steam, Water
- Specifications Met: ASME B1.20.1, ASME B31.1, ASME B31.3
316 Stainless Steel | |||||
|---|---|---|---|---|---|
| Pipe Size | Lg. | Max. Pressure | Max. Steam Pressure | Each | |
NPT Male | |||||
| 1/16 | 1 1/16" | 10,000 psi @ 72° F | 10,000 psi @ 300° F | 000000000 | 000000 |
| 1/16 | 2" | 10,000 psi @ 72° F | 10,000 psi @ 300° F | 000000000 | 00000 |
| 1/16 | 2 1/2" | 10,000 psi @ 72° F | 10,000 psi @ 300° F | 000000000 | 00000 |
| 1/16 | 4" | 10,000 psi @ 72° F | 10,000 psi @ 300° F | 000000000 | 00000 |
- For Use With: Hydraulic Fluid, Liquid Nitrogen, Natural Gas, Steam, Water
- Specifications Met: ASME B1.20.1, ASME B31.1, ASME B31.3
Pipe Size | Dash Size | 316 Stainless Steel | ||||
|---|---|---|---|---|---|---|
| (A) | (B) | (A) | Max. Pressure | Max. Steam Pressure | Each | |
NPT Male | ||||||
| 1/8 | 1/16 | 02 | 9,100 psi @ 72° F | 9,100 psi @ 300° F | 000000000 | 000000 |
Miniature Medium-Pressure Stainless Steel Threaded Pipe Fittings
When space is at a premium choose these compact fittings. Though small in size, they have the strength to handle medium-pressure applications. Fittings are stainless steel for very good corrosion resistance.
Metric, BSPP, and UN/UNF (SAE Straight) male threads have a gasket to protect against leaks. Made from fluoroelastomer, these gaskets resist chemicals, including benzene, butyl alcohol, and ethylene glycol. UN/UNF (SAE Straight) threads are also known as O-ring boss threads.
UN/UNF (SAE Straight)
Male Threads with Gasket
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Specifications Met: ASTM A314, ASTM A320, ASTM A582
303 Stainless Steel | ||||||
|---|---|---|---|---|---|---|
| Pipe Size | Thread Size | Max. Pressure | Max. Steam Pressure | Gasket Material | Each | |
NPT Male × Metric Male | ||||||
| 1/16 | M5 × 0.8 mm | 500 psi @ 72° F | 100 psi @ 350° F | Fluoroelastomer Rubber | 00000000 | 000000 |
NPT Male × UN/UNF (SAE Straight) Male | ||||||
| 1/16 | 10-32 | 500 psi @ 72° F | 100 psi @ 350° F | Fluoroelastomer Rubber | 00000000 | 00000 |
| 1/16 | 1/4"-28 | 500 psi @ 72° F | 100 psi @ 350° F | Fluoroelastomer Rubber | 00000000 | 00000 |
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Specifications Met: ASTM A314, ASTM A320, ASTM A582
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Specifications Met: ASTM A314, ASTM A320, ASTM A582
Pipe Size | 316 Stainless Steel | ||||
|---|---|---|---|---|---|
| (A) | (B) | Max. Pressure | Max. Steam Pressure | Each | |
NPT Female × NPT Male | |||||
| 1/8 | 1/16 | 500 psi @ 72° F | 100 psi @ 350° F | 0000000 | 000000 |
High-Pressure Brass Threaded Pipe Fittings
These fittings have the strength to handle high-pressure applications. They are brass for good corrosion resistance.
Right-angle tees are also known as run tees.
NPTF (Dryseal) threads are compatible with NPT threads.
- For Use With: Air, Water, Natural Gas, Oil
- Specifications Met: See table
| Pipe Size | Max. Pressure | Each | |
NPT Female | |||
|---|---|---|---|
| 1/16 | 1,000 psi @ 72° F | 000000000 | 000000 |
- For Use With: Air, Water, Natural Gas, Oil
- Specifications Met: See table
Pipe Size | ||||
|---|---|---|---|---|
| (A) | (B) | Max. Pressure | Each | |
NPT Male | ||||
| 1/8 | 1/16 | 1,000 psi @ 72° F | 0000000 | 00000 |
- For Use With: Air, Water, Oil, Natural Gas
Pipe Size | ||||
|---|---|---|---|---|
| (A) | (B) | Max. Pressure | Each | |
NPTF Female × NPTF Male | ||||
| 1/8 | 1/16 | 1,000 psi @ 72° F | 000000000 | 000000 |
- For Use With: Air, Natural Gas, Oil, Water
Pipe Size | ||||
|---|---|---|---|---|
| (A) | (B) | Max. Pressure | Each | |
NPTF Female × NPTF Male | ||||
| 1/8 | 1/16 | 1,000 psi @ 72° F | 000000000 | 000000 |
High-Pressure Brass Threaded Pipe Nipples and Pipe
Use this extra-strong pipe in a high-pressure line. It is brass for good corrosion resistance.
Fully threaded pipe is also known as a close nipple; it is threaded on each end to the center.
- For Use With: Air, Natural Gas, Oil, Water
| Pipe Size | Lg. | Thread Type | Max. Pressure | Each | |
| 1/16 | 5/8" | NPT | 1,000 psi @ 72° F | 000000000 | 00000 |
High-Pressure Brass Threaded Pipe Fittings with Sealant
Not only do these fittings have the strength to handle high-pressure applications, the male threads have a sealant applied for extra protection against leaks. Fittings are brass for good corrosion resistance.
- For Use With: See table
Pipe Size | |||||
|---|---|---|---|---|---|
| (A) | (B) | Max. Pressure | For Use With | Each | |
NPT Male × NPT Female | |||||
| 1/8 | 1/16 | 1,000 psi @ 72° F | Air, Natural Gas, Oil, Water | 000000000 | 00000 |
- For Use With: Air, Natural Gas, Oil, Water
Pipe Size | ||||
|---|---|---|---|---|
| (A) | (B) | Max. Pressure | Each | |
NPT Male | ||||
| 1/8 | 1/16 | 1,000 psi @ 72° F | 00000000 | 000000 |
- For Use With: Air, Natural Gas, Oil, Water
| Pipe Size | Drive Size | Max. Pressure | Each | |
NPT Male | ||||
|---|---|---|---|---|
| 1/16 | 5/32" | 1,000 psi @ 72° F | 000000000 | 00000 |
High-Pressure Brass Threaded Pipe Nipples and Pipe with Sealant
Not only does this pipe have the strength to handle high-pressure applications, the threads have a sealant applied for extra protection against leaks. Pipe is brass for good corrosion resistance.
Fully threaded pipe is also known as a close nipple; it is threaded on each end to the center.
- For Use With: Air, Natural Gas, Oil, Water
| Pipe Size | Lg. | Thread Type | Max. Pressure | Each | |
| 1/16 | 5/8" | NPT | 1,000 psi @ 72° F | 000000000 | 00000 |
Precision Extreme-Pressure Brass Threaded Pipe Fittings
Also known as instrumentation fittings, these have the most precise threads and the tightest tolerances of all the brass pipe fittings we offer. Fittings are brass for good corrosion resistance.
- For Use With: Air, Argon, Natural Gas, Nitrogen Gas, Oil, Oxygen, Steam, Water
- Specifications Met: See table
Pipe Size | ||||||
|---|---|---|---|---|---|---|
| (A) | (B) | Max. Pressure | Max. Steam Pressure | Specifications Met | Each | |
NPT Male | ||||||
| 1/8 | 1/16 | 5,000 psi @ 72° F | 1,500 psi @ 300° F | ASME B1.20.1, ASME B31.3 | 00000000 | 000000 |
Miniature Medium-Pressure Aluminum Threaded Pipe Fittings
Their small size makes these miniature fittings a good choice for cramped, confined spaces. They are designed to handle medium-pressure applications. Fittings are aluminum, which is lightweight with good corrosion resistance.
Metric 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.
(SAE Straight) Male
Threads with Gasket
Nickel-Plated Brass Low-Pressure Barbed Tube Fittings for Air and Water
The nickel plating on these brass fittings provides extra protection against corrosive environments. The plating won’t peel or chip, so the fittings keep a bright, polished appearance. The barbs grip onto tubing, providing a secure hold with no clamp required.
- Temperature Range: -40° to 230° F,
except UN/UNF (SAE Straight) Threads: -20° to 160° F - Tubing: Use with hard (Durometer 60D-90D) Buna-N rubber, EVA plastic, Nylon plastic, polyethylene plastic, polypropylene plastic, polyurethane rubber, PTFE plastic, PVC plastic, PVDF plastic, or silicone rubber,
except UN/UNF (SAE Straight) Threads: Use with firm (Durometer 85A) polyurethane rubber
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 Tube ID | Pipe Size | Material | Max. Pressure | Each | |
NPT Threads | |||||
|---|---|---|---|---|---|
| 1/16" | 1/16 | Aluminum | 125 psi @ 72° F | 00000000 | 000000 |
Brass Low-Pressure Barbed Tube Fittings for Air and Water
A brass body provides protection against corrosive environments. Fittings have barbs that grip onto tubing.
Fittings with a single barb provide a smooth clamping surface for extra-tight connections that minimize leaks.
NPTF (Dryseal) fittings are compatible with NPT threads.
- Temperature Range: NPT, UN/UNF (SAE Straight) Threads: 32° to 180° F
NPTF Threads: -65° to 75° F
BSPT Threads: -40° to 160° F - Tubing: NPT, UN/UNF (SAE Straight) Threads: Use with firm (Durometer 85A) polyurethane rubber
NPTF Threads: Use with firm (Durometer 95A) polyurethane rubber
BSPT Threads: Use with firm (Durometer 85A) nylon plastic
Choose-a-Color 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
Color-code fittings for easy identification. Fittings are aluminum, which is lightweight with good corrosion resistance. The barb grips onto tubing, providing a secure hold with no clamp required.
Stainless Steel High-Pressure Barbed Tube Fittings for Air and Water
- Temperature Range: See table
- Tubing: Use with firm (Durometer 75A-95A) EVA plastic, polyethylene plastic, polypropylene plastic or PVC plastic
Fittings withstand pressures up to 250 psi. They are 303 stainless steel for very good corrosion resistance.
| For Tube ID | Pipe Size | Material | Max. Pressure | Temp. Range, °F | Number of Barbs | Each | |
NPT Threads | |||||||
|---|---|---|---|---|---|---|---|
| 2mm | 1/16 | 303 Stainless Steel | 250 psi @ 72° F | -40° to 500° F | Single | 00000000 | 000000 |
| 6mm | 1/16 | 303 Stainless Steel | 250 psi @ 72° F | -40° to 500° F | Single | 00000000 | 00000 |
| 8mm | 1/16 | 303 Stainless Steel | 250 psi @ 72° F | -40° to 500° F | Single | 00000000 | 00000 |
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.
- 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
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.
Easy-View Plastic Barbed Tube Fittings for Air and Water
- Temperature Range: -210° to 270° F
- Tubing: Use with firm or soft (Durometer 45A-90A) polyurethane rubber or PVC plastic
Monitor flow with these clear fittings. They have a single barb that creates a smooth clamping surface for extra-tight connections that minimize leaks. Fittings are polycarbonate for excellent impact resistance.
For technical drawings and 3-D models, click on a part number.
| For Tube ID | Pipe Size | Material | Color | Max. Pressure | Pkg. Qty. | Pkg. | |
NPT Threads | |||||||
|---|---|---|---|---|---|---|---|
| 1/16" | 1/16 | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 000000 |
| 3/32" | 1/16 | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 1/8" | 1/16 | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 5/32" | 1/16 | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
| 3/16" | 1/16 | Polycarbonate Plastic | Clear | 125 psi @ 72° F | 10 | 0000000 | 00000 |
Plastic Barbed Tube Fittings for Food and Beverage
- Temperature Range: 32° to 250° F
- Tubing: Use with soft or firm (Durometer 45A-90A) polyurethane rubber, PVC plastic, or silicone rubber
Minimize leaks in your line—these fittings have a single barb that creates a smooth clamping surface for extra-tight connections. They’re FDA compliant for direct contact with food. Fittings are polypropylene, which has excellent impact and abrasion resistance. Use them on soft or firm tubing.
| For Tube ID | Pipe Size | Material | Color | Clarity | Max. Pressure | Pkg. Qty. | Pkg. | |
NPT Threads | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/16" | 1/16 | Polypropylene Plastic | White | Semi-Clear | 120 psi @ 72° F | 10 | 00000000 | 00000 |
| 3/32" | 1/16 | Polypropylene Plastic | White | Semi-Clear | 120 psi @ 72° F | 10 | 00000000 | 0000 |
| 1/8" | 1/16 | Polypropylene Plastic | White | Semi-Clear | 120 psi @ 72° F | 10 | 00000000 | 0000 |
| 5/32" | 1/16 | Polypropylene Plastic | White | Semi-Clear | 120 psi @ 72° F | 10 | 00000000 | 0000 |
| 3/16" | 1/16 | Polypropylene Plastic | White | Semi-Clear | 120 psi @ 72° F | 10 | 00000000 | 0000 |
Barbed Fittings for Plastic and Rubber Tubing—Chemicals
- For Use With: Alcohol, Coolant, Mild Bases
- Temperature Range: See table
- Tubing: Use with firm (Durometer 75A-80A) polyurethane rubber, PVC plastic, or Viton® fluoroelastomer rubber
Minimize leaks in your line—these fittings have a single barb that creates a smooth clamping surface for extra-tight connections. Fittings are polypropylene, which has very good chemical resistance as well as impact and abrasion resistance.
