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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High-Pressure Brass Threaded Pipe Fittings
These fittings have the strength to handle high-pressure applications. They are brass for good corrosion resistance.

- For Use With: Air, Natural Gas, Oil, Water
- Specifications Met: See table
Hollow | Solid | |||||
---|---|---|---|---|---|---|
Pipe Size | Max. Pressure | Specifications Met | Each | Each | ||
NPT Male | ||||||
1/8 | 1,000 psi @ 72° F | __ | 000000000 | 00000 | 000000000 | 00000 |
1/4 | 1,000 psi @ 72° F | __ | 000000000 | 0000 | 000000000 | 0000 |
3/8 | 1,000 psi @ 72° F | __ | 000000000 | 0000 | 000000000 | 0000 |
1/2 | 1,000 psi @ 72° F | __ | 000000000 | 0000 | 000000000 | 0000 |
3/4 | 1,000 psi @ 72° F | __ | 000000000 | 00000 | 000000000 | 00000 |
1 | 1,000 psi @ 72° F | __ | 000000000 | 00000 | 000000 | 00 |
BSPT Male | ||||||
1/8 | 1,000 psi @ 72° F | SAE J530, SAE J531 | 000000000 | 0000 | 000000 | 00 |
1/4 | 1,000 psi @ 72° F | SAE J530, SAE J531 | 0000000 | 00000 | 000000 | 00 |
3/8 | 1,000 psi @ 72° F | SAE J530, SAE J531 | 000000000 | 00000 | 000000 | 00 |
3/4 | 1,000 psi @ 72° F | SAE J530, SAE J531 | 000000000 | 00000 | 000000 | 00 |
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.
Low-Pressure Brass and Bronze Threaded Pipe Fittings
Use these fittings in low-pressure flow applications. They have good corrosion resistance. Fittings rated for use with drinking water meet NSF/ANSI 61 safety standards.

- For Use With: Air, Drinking Water, Natural Gas, Oil
- Pressure Class: 125
- Specifications Met:
NPT: ASME B1.20.1, ASME B16.15, NSF/ANSI 61
BSPT: ASME B16.15, ASME BS21, ASTM B584, NSF/ANSI 61 - Pipe Nipples and Pipe: Use Schedule 40 brass
- Flanges: Use Class 150 brass
Pipe Size | Plug Construction | Max. Pressure | Material | Each | |
NPT Male | |||||
---|---|---|---|---|---|
1/2 | Solid | 200 psi @ 72° F | Brass | 00000000 | 000000 |
3/4 | Solid | 200 psi @ 72° F | Brass | 00000000 | 00000 |
1 | Solid | 200 psi @ 72° F | Brass | 00000000 | 00000 |
1 1/4 | Solid | 200 psi @ 72° F | Brass | 00000000 | 00000 |
1 1/2 | Solid | 200 psi @ 72° F | Brass | 00000000 | 00000 |
2 | Solid | 200 psi @ 72° F | Brass | 00000000 | 00000 |
2 1/2 | Solid | 200 psi @ 72° F | Brass | 00000000 | 000000 |
3 | Solid | 200 psi @ 72° F | Brass | 00000000 | 000000 |
4 | Solid | 200 psi @ 72° F | Brass | 00000000 | 000000 |
BSPT Male | |||||
3/4 | Solid | 200 psi @ 72° F | Brass | 00000000 | 00000 |
1 | Solid | 200 psi @ 72° F | Brass | 00000000 | 00000 |
1 1/2 | Solid | 200 psi @ 72° F | Brass | 00000000 | 00000 |
2 | Solid | 200 psi @ 72° F | Brass | 00000000 | 00000 |

- For Use With: Air, Drinking Water, Natural Gas, Oil
- Pressure Class: 125
- Specifications Met: See table
- Pipe Nipples and Pipe: Use Schedule 40 brass
- Flanges: Use Class 150 brass
Pipe Size | Plug Construction | Max. Pressure | Material | Specifications Met | Each | |
NPT Male | ||||||
---|---|---|---|---|---|---|
1/8 | Solid | 200 psi @ 72° F | Brass | ASME B1.20.1, ASME B16.15, NSF/ANSI 61 | 00000000 | 00000 |
1/4 | Solid | 200 psi @ 72° F | Brass | ASME B1.20.1, ASME B16.15, NSF/ANSI 61 | 00000000 | 0000 |
3/8 | Hollow | 200 psi @ 72° F | Brass | ASME B1.20.1, ASME B16.15, NSF/ANSI 61 | 00000000 | 0000 |
3/8 | Solid | 200 psi @ 72° F | Brass | ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61 | 00000000 | 0000 |
1/2 | Hollow | 200 psi @ 72° F | Brass | ASME B1.20.1, ASME B16.15, NSF/ANSI 61 | 00000000 | 0000 |
1/2 | Solid | 200 psi @ 72° F | Brass | ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61 | 00000000 | 0000 |
3/4 | Hollow | 200 psi @ 72° F | Brass | ASME B1.20.1, ASME B16.15, NSF/ANSI 61 | 00000000 | 0000 |
3/4 | Solid | 200 psi @ 72° F | Brass | ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61 | 00000000 | 0000 |
1 | Hollow | 200 psi @ 72° F | Brass | ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61 | 00000000 | 00000 |
1 | Solid | 200 psi @ 72° F | Brass | ASME B1.20.1, ASME B16.15, NSF/ANSI 61 | 00000000 | 00000 |
1 1/4 | Hollow | 200 psi @ 72° F | Brass | ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61 | 00000000 | 00000 |
1 1/4 | Solid | 200 psi @ 72° F | Brass | ASME B1.20.1, ASME B16.15, NSF/ANSI 61 | 00000000 | 00000 |
1 1/2 | Hollow | 200 psi @ 72° F | Brass | ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61 | 00000000 | 00000 |
1 1/2 | Solid | 200 psi @ 72° F | Brass | ASME B1.20.1, ASME B16.15, NSF/ANSI 61 | 00000000 | 00000 |
2 | Hollow | 200 psi @ 72° F | Brass | ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61 | 00000000 | 00000 |
2 | Solid | 200 psi @ 72° F | Brass | ASME B1.20.1, ASME B16.15, NSF/ANSI 61 | 00000000 | 00000 |
2 1/2 | Hollow | 200 psi @ 72° F | Brass | ASME B1.20.1, ASME B16.15, NSF/ANSI 61 | 00000000 | 00000 |
2 1/2 | Solid | 200 psi @ 72° F | Brass | ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61 | 00000000 | 00000 |
3 | Hollow | 200 psi @ 72° F | Brass | ASME B1.20.1, ASME B16.15, NSF/ANSI 61 | 00000000 | 00000 |
3 | Solid | 200 psi @ 72° F | Brass | ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61 | 00000000 | 000000 |
4 | Hollow | 200 psi @ 72° F | Brass | ASME B1.20.1, ASME B16.15, NSF/ANSI 61 | 00000000 | 000000 |
4 | Solid | 200 psi @ 72° F | Brass | ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61 | 00000000 | 000000 |
BSPT Male | ||||||
1/8 | Solid | 200 psi @ 72° F | Brass | ASME B16.15, ASME BS21, ASTM B584, NSF/ANSI 61 | 00000000 | 0000 |
1/4 | Solid | 200 psi @ 72° F | Brass | ASME B16.15, ASME BS21, ASTM B584, NSF/ANSI 61 | 00000000 | 0000 |
3/8 | Solid | 200 psi @ 72° F | Brass | ASME B16.15, ASME BS21, ASTM B584, NSF/ANSI 61 | 00000000 | 0000 |
1/2 | Hollow | 200 psi @ 72° F | Brass | ASME B16.15, ASME BS21, ASTM B584, NSF/ANSI 61 | 00000000 | 00000 |
1/2 | Solid | 200 psi @ 72° F | Brass | ASME B16.15, ASME BS21, ASTM B584, NSF/ANSI 61 | 00000000 | 00000 |
3/4 | Hollow | 200 psi @ 72° F | Brass | ASME B16.15, ASME BS21, ASTM B584, NSF/ANSI 61 | 00000000 | 00000 |
3/4 | Solid | 200 psi @ 72° F | Brass | ASME B16.15, ASME BS21, ASTM B584, NSF/ANSI 61 | 00000000 | 00000 |
1 | Hollow | 200 psi @ 72° F | Brass | ASME B16.15, ASME BS21, ASTM B584, NSF/ANSI 61 | 00000000 | 00000 |
1 | Solid | 200 psi @ 72° F | Brass | ASME B16.15, ASME BS21, ASTM B584, NSF/ANSI 61 | 00000000 | 00000 |
1 1/4 | Solid | 200 psi @ 72° F | Brass | ASME B16.15, ASME BS21, ASTM B584, NSF/ANSI 61 | 00000000 | 00000 |
1 1/2 | Solid | 200 psi @ 72° F | Brass | ASME B16.15, ASME BS21, ASTM B584, NSF/ANSI 61 | 00000000 | 00000 |
2 | Hollow | 200 psi @ 72° F | Brass | ASME B16.15, ASME BS21, ASTM B584, NSF/ANSI 61 | 00000000 | 00000 |
2 | Solid | 200 psi @ 72° F | Brass | ASME B16.15, ASME BS21, ASTM B584, NSF/ANSI 61 | 00000000 | 00000 |
Low-Pressure Brass Threaded Pipe Fittings with Sealant
The male threads on these fittings have a sealant applied for extra protection against leaks. Also known as Pressure Class 125 fittings, they are built for use in low-pressure applications. They are brass for good corrosion resistance.

- For Use With: Air, Drinking Water, Natural Gas, Oil, Water
- Pressure Class: 125
- Pipe Nipples and Pipe: Use Schedule 40 brass
- Flanges: Use Class 150 brass

- For Use With: Air, Natural Gas, Oil, Water
- Pressure Class: 125
- Specifications Met: ASME B1.20.1, ASME B16.15
- Pipe Nipples and Pipe: Use Schedule 40 brass
- Flanges: Use Class 150 brass
Pipe Size | Plug Construction | Max. Pressure | Each | |
NPT Male | ||||
---|---|---|---|---|
1/8 | Solid | 200 psi @ 72° F | 0000000 | 00000 |
1/4 | Solid | 200 psi @ 72° F | 0000000 | 0000 |
3/8 | Solid | 200 psi @ 72° F | 0000000 | 0000 |
1/2 | Solid | 200 psi @ 72° F | 0000000 | 0000 |
3/4 | Solid | 200 psi @ 72° F | 0000000 | 0000 |
1 | Solid | 200 psi @ 72° F | 0000000 | 00000 |
1 1/2 | Solid | 200 psi @ 72° F | 0000000 | 00000 |
2 | Solid | 200 psi @ 72° F | 0000000 | 00000 |
Low-Pressure Plated Brass Threaded Pipe Fittings
Used in low-pressure pipe lines, these brass fittings have a plating that makes them shiny and improves corrosion resistance.
Chrome-plated brass fittings are shinier and withstand corrosion better than nickel-plated brass fittings.

- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 125
- Specifications Met: ASME B16.15, ASTM B456
- Pipe Nipples and Pipe: Use Schedule 40 brass
Pipe Size | Plug Construction | Max. Pressure | Max. Steam Pressure | Each | |
NPT Male | |||||
---|---|---|---|---|---|
Chrome-Plated Brass | |||||
1/8 | Solid | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 000000 |
1/4 | Solid | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 00000 |
3/8 | Solid | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 00000 |
1/2 | Solid | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 00000 |
3/4 | Solid | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 00000 |
1 | Solid | 200 psi @ 72° F | 125 psi @ 400° F | 00000000 | 00000 |
Extreme-Pressure Brass Threaded Pipe Fittings
Extreme pressures are no problem for these heavy-duty fittings. They are brass for good corrosion resistance.

- For Use With: Air, Water
- Specifications Met: ISO 7.1, ISO 228