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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Low-Pressure Galvanized Iron and Steel Threaded Pipe Fittings
The galvanized finish on these fittings provides fair corrosion resistance. Fittings are for use in low-pressure applications.
Female x male 90° elbow adapters are also known as street elbows.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Pressure Class: 150
- Specifications Met: ASTM A197, UL Listed, ASME B16.3, ASME B1.20.1
- Pipe Nipples and Pipe: Use Schedule 40 steel
- Flanges: Use Class 150 galvanized steel
Pipe Size | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT Female × NPT Male | |||||
|---|---|---|---|---|---|
| 1/8 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 1/4 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 0000 |
| 3/8 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 0000 |
| 1/2 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 0000 |
| 3/4 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 0000 |
| 1 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 1 1/4 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 1 1/2 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 2 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 2 1/2 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 000000 |
| 3 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 000000 |
| 4 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 000000 |
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Pressure Class: 150
- Specifications Met: ASTM A153, UL Listed, ASME B16.3, ASME B1.20.1
- Pipe Nipples and Pipe: Use Schedule 40 steel
- Flanges: Use Class 150 galvanized steel
Pipe Size | ||||||
|---|---|---|---|---|---|---|
| (A) | (B) | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT Female × NPT Male | ||||||
| 1/2 | 3/8 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 000000 |
| 3/4 | 1/2 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 1 | 3/4 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 1 1/4 | 3/4 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 1 1/4 | 1 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 1 1/2 | 1 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 1 1/2 | 1 1/4 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 2 | 1 1/2 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Pressure Class: 150
- Specifications Met: ASTM A197, UL Listed, ASME B16.3, ASME B1.20.1
- Pipe Nipples and Pipe: Use Schedule 40 steel
- Flanges: Use Class 150 galvanized steel
| Pipe Size | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT Female × NPT Male | |||||
|---|---|---|---|---|---|
| 1/8 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 000000 |
| 1/4 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 3/8 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 1/2 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 0000 |
| 3/4 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 1 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 1 1/4 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 1 1/2 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
| 2 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 00000 |
High-Pressure Galvanized Steel Threaded Pipe Fittings
A galvanized finish gives these fittings better corrosion resistance than our plain steel high-pressure fittings. Also known as Pressure Class 3000 fittings, they have excellent strength to handle high-pressure applications.
Female x male 90° elbow adapters are also known as street elbows.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Pressure Class: 3000
- Specifications Met: ASME B1.20.1, ASME B16.11, ASTM A105, ASTM B633
- Pipe Nipples and Pipe: Use Schedule 160 steel
| Pipe Size | Dash Size | Max. Pressure | Max. Steam Pressure | Each | |
NPT Female × NPT Male | |||||
|---|---|---|---|---|---|
| 1/8 | 02 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 000000 |
| 1/4 | 04 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
| 3/8 | 06 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
| 1/2 | 08 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
| 3/4 | 12 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
| 1 | 16 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
| 1 1/4 | 20 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
| 1 1/2 | 24 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 00000 |
| 2 | 32 | 3,000 psi @ 72° F | 300 psi @ 360° F | 00000000 | 000000 |
Medium-Pressure Galvanized Iron and Steel Threaded Pipe Fittings
A galvanized finish gives these fittings fair corrosion resistance. They have the strength to handle medium-pressure applications.
Female x male 90° elbow adapters are also known as street elbows.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Steam, Water
- Pressure Class : 300
- Specifications Met: ASTM A153, ASTM A197, ASME B16.3, ASME B1.20.1
- Pipe Nipples and Pipe: Use Schedule 80 steel
- Flanges: Use Class 300 steel
| Pipe Size | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT Female × NPT Male | |||||
|---|---|---|---|---|---|
| 1/4 | 2,000 psi @ 72° F | 300 psi @ 550° F | Galvanized Iron | 0000000 | 000000 |
| 3/8 | 2,000 psi @ 72° F | 300 psi @ 550° F | Galvanized Iron | 0000000 | 00000 |
| 1/2 | 2,000 psi @ 72° F | 300 psi @ 550° F | Galvanized Iron | 000000 | 00000 |
| 3/4 | 2,000 psi @ 72° F | 300 psi @ 550° F | Galvanized Iron | 0000000 | 00000 |
| 1 | 2,000 psi @ 72° F | 300 psi @ 550° F | Galvanized Iron | 0000000 | 00000 |
| 1 1/4 | 1,500 psi @ 72° F | 300 psi @ 550° F | Galvanized Iron | 0000000 | 000000 |
| 1 1/2 | 1,500 psi @ 72° F | 300 psi @ 550° F | Galvanized Iron | 0000000 | 000000 |
Compact Extreme-Pressure Steel Threaded Pipe Fittings
These fittings are strong enough to handle extreme pressures, yet small enough to fit into cramped spaces. They are galvanized and zinc-plated steel, which have better corrosion resistance than plain steel fittings.
Female x male 90° elbow adapters are also known as street elbows.
NPTF (Dryseal) threads are compatible with NPT threads. UN/UNF (SAE Straight) threads are also known as O-ring boss threads; the male threads have either a gasket or a gasket and washer to prevent leaks.
For technical drawings and 3-D models, click on a part number.
(SAE Straight) Male
Threads with Gasket
- For Use With: Air, Hydraulic Fluid, Water
- Specifications Met: ASTM A576
| Pipe Size (A) | Thread Size (A) | Dash Size (A) | Pipe Size (B) | Thread Size (B) | Dash Size (B) | Max. Pressure | Material | Each | |
NPT Female × NPTF Male | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 1/4 | __ | 20 | 1 1/4 | __ | 20 | 1,500 psi @ 72° F | Zinc Plated Steel | 000000000 | 000000 |
| 1 1/2 | __ | 24 | 1 1/2 | __ | 24 | 1,500 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
NPTF Female × NPTF Male | |||||||||
| 1/8 | __ | 02 | 1/8 | __ | 02 | 5,000 psi @ 72° F | Zinc Plated Steel | 000000000 | 0000 |
| 1/4 | __ | 04 | 1/4 | __ | 04 | 5,000 psi @ 72° F | Zinc Plated Steel | 000000000 | 0000 |
| 3/8 | __ | 06 | 3/8 | __ | 06 | 4,500 psi @ 72° F | Zinc Plated Steel | 000000000 | 0000 |
| 1/2 | __ | 08 | 1/2 | __ | 08 | 3,000 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
| 3/4 | __ | 12 | 3/4 | __ | 12 | 3,000 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
| 1 | __ | 16 | 1 | __ | 16 | 1,800 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
NPTF Female × UN/UNF (SAE Straight) Male | |||||||||
| 1/8 | __ | 02 | __ | 7/16"-20 | 04 | 6,000 psi @ 72° F | Zinc Plated Steel | 000000000 | 0000 |
| 1/4 | __ | 04 | __ | 9/16"-18 | 06 | 5,000 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
| 3/8 | __ | 06 | __ | 3/4"-16 | 08 | 4,500 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
| 1/2 | __ | 08 | __ | 7/8"-14 | 10 | 3,000 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
| 3/4 | __ | 12 | __ | 1 1/16"-12 | 12 | 3,000 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
| 1 | __ | 16 | __ | 1 5/16"-12 | 16 | 1,800 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
UN/UNF (SAE Straight) Female × UN/UNF (SAE Straight) Male | |||||||||
| __ | 1 1/16"-12 | 12 | __ | 1 1/16"-12 | 12 | 2,500 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
| __ | 7/16"-20 | 04 | __ | 7/16"-20 | 04 | 6,000 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
| __ | 9/16"-18 | 06 | __ | 9/16"-18 | 06 | 5,000 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
| __ | 3/4"-16 | 08 | __ | 3/4"-16 | 08 | 4,000 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
- For Use With: Air, Hydraulic Fluid, Water
- Specifications Met: ASTM A576
Pipe Size | Dash Size | ||||||
|---|---|---|---|---|---|---|---|
| (A) | (B) | (A) | (B) | Max. Pressure | Material | Each | |
NPT Female × NPTF Male | |||||||
| 1/2 | 1/4 | 08 | 04 | 3,000 psi @ 72° F | Zinc Plated Steel | 000000000 | 000000 |
NPTF Female × NPTF Male | |||||||
| 1/8 | 1/4 | 02 | 04 | 5,000 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
| 1/4 | 1/8 | 04 | 02 | 5,000 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
| 1/4 | 3/8 | 04 | 06 | 5,000 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
| 3/8 | 1/4 | 06 | 04 | 4,500 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
| 3/8 | 1/2 | 06 | 08 | 4,500 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
| 1/2 | 3/8 | 08 | 06 | 3,000 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
| 1/2 | 3/4 | 08 | 12 | 3,000 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
| 3/4 | 1/2 | 12 | 08 | 3,000 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
- For Use With: Air, Hydraulic Fluid, Water
- Specifications Met: ASTM A576
| Pipe Size | Dash Size | Max. Pressure | Material | Each | |
NPTF Female × NPTF Male | |||||
|---|---|---|---|---|---|
| 1/8 | 02 | 5,000 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
| 1/4 | 04 | 5,000 psi @ 72° F | Zinc Plated Steel | 000000000 | 0000 |
| 3/8 | 06 | 4,500 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
| 1/2 | 08 | 3,000 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
| 3/4 | 12 | 3,000 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
| 1 | 16 | 1,800 psi @ 72° F | Zinc Plated Steel | 000000000 | 00000 |
Compact Precision Extreme-Pressure Steel Threaded Pipe Fittings
Made to tighter tolerances than other steel pipe fittings, these are also known as instrumentation fittings. They are strong enough to handle extreme pressures, yet small enough to fit into cramped spaces. They are galvanized steel, which has fair corrosion resistance.
Female x male 90° elbow adapters are also known as street elbows.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Water, Hydraulic Fluid
- Specifications Met: ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A179
- For Use With: Air, Natural Gas, Water, Hydraulic Fluid
- Specifications Met: ANSI/ASME B31.1, ANSI/ASM B1.20.1, ANSI/ASME B31.3, ASME B1.20.1, ASME B31.1, ASME B31.3, ASTM A108, ASTM A179