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 Iron and Steel Threaded Pipe Fittings
Use these fittings for low-pressure applications in noncorrosive environments.
Union connectors separate into three pieces so you can access your line without unthreading pipe connections. They have a gasket that creates a tight seal.
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: See table
- Pipe Nipples and Pipe: Use Schedule 40 steel
Pipe Size | Max. Pressure | Max. Steam Pressure | Material | Specifications Met | Each | |
BSPT Female—Threaded on Both Ends | ||||||
---|---|---|---|---|---|---|
2 1/2 | 150 psi @ 72° F | 150 psi @ 360° F | Iron | DIN EN 10226 | 0000000 | 000000 |

- For Use With: Air, Steam, Oil, Water, Natural Gas
- Pressure Class: 150
- Specifications Met: See table
- Pipe Nipples and Pipe: Use Schedule 40 steel
Pipe Size | Max. Pressure | Max. Steam Pressure | Body Shape | Material | Gasket Material | Specifications Met | Each | |
BSPT Female | ||||||||
---|---|---|---|---|---|---|---|---|
2 1/2 | 150 psi @ 72° F | 150 psi @ 360° F | Hex | Iron | Brass | DIN EN 10226 | 0000000 | 000000 |

- For Use With: Air, Steam, Oil, Water, Natural Gas
- Pressure Class: 150
- Specifications Met:
NPT: ASME B1.20.1, ASME B16.3, UL Listed
BSPT: DIN EN 10226 - Pipe Nipples and Pipe: Use Schedule 40 steel
Pipe Size | Max. Pressure | Max. Steam Pressure | Material | Each | |
BSPT Female | |||||
---|---|---|---|---|---|
2 1/2 | 150 psi @ 72° F | 150 psi @ 360° F | Iron | 0000000 | 000000 |

- For Use With: Air, Steam, Oil, Water, Natural Gas
- Pressure Class: 150
- Specifications Met:
NPT: ASME B1.20.1, ASME B16.3, UL Listed
BSPT: DIN EN 10226 - Pipe Nipples and Pipe: Use Schedule 40 steel
Pipe Size | Max. Pressure | Max. Steam Pressure | Material | Each | |
BSPT Female | |||||
---|---|---|---|---|---|
2 1/2 | 150 psi @ 72° F | 150 psi @ 360° F | Iron | 0000000 | 000000 |

- For Use With: Air, Steam, Oil, Water, Natural Gas
- Specifications Met:
NPT: ASME B1.20.1, ASME B16.3, UL Listed
BSPT: DIN EN 10226 - Pipe Nipples and Pipe: Use Schedule 40 steel
Pipe Size | Max. Pressure | Max. Steam Pressure | Material | Each | |
BSPT Female | |||||
---|---|---|---|---|---|
2 1/2 | 150 psi @ 72° F | 150 psi @ 360° F | Iron | 0000000 | 000000 |

- For Use With: Air, Steam, Oil, Water, Natural Gas
- Specifications Met:
NPT: ASME B1.20.1, ASME B16.3
BSPT: DIN EN 10226 - Pipe Nipples and Pipe: Use Schedule 40 steel
Pipe Size | Max. Pressure | Max. Steam Pressure | Material | Each | |
BSPT Female | |||||
---|---|---|---|---|---|
2 1/2 | 150 psi @ 72° F | 150 psi @ 360° F | Iron | 0000000 | 000000 |

- For Use With:
NPT and BSPT: Air, Natural Gas, Oil, Steam, Water
NPTF: Air, Natural Gas, Steam, Water - Pressure Class:
NPT Iron: 125
BSPT Iron: 150 - Specifications Met:
See table - Pipe Nipples and Pipe:
NPT and BPST: Use Schedule 40 steel
Pipe Size | Plug Construction | Max. Pressure | Max. Steam Pressure | Material | Specifications Met | Each | |
BSPT Male | |||||||
---|---|---|---|---|---|---|---|
2 1/2 | Hollow | 150 psi @ 72° F | 150 psi @ 360° F | Iron | DIN EN 10226 | 0000000 | 000000 |
Low-Pressure Steel Threaded Pipe Flanges
Use these flanges for low-pressure applications in noncorrosive environments. Bolt two flanges of the same size together with a gasket (sold separately) to create an access point within a line.
For technical drawings and 3-D models, click on a part number.


- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Specifications Met:
NPT: ASME B16.5, ASTM A105, MSS SP-25
BSPT: ASTM A105 - Fittings: Use Class 125 or 150 iron and steel
- Pipe Nipples and Pipe: Use Schedule 40 steel
Bolt Hole | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Max. Steam Pressure | Material | Each | |
BSPT | ||||||||||
2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 285 psi @ 72° F | 230 psi @ 300° F | Steel | 0000000 | 0000000 |
Easy-Fit Barbed Hose Fittings for Air and Water
Low-profile barbs and a longer first barb allow for a smoother, easier installation than other barbed fittings. Slide the barbed end into rubber hose and secure with a clamp.
Zinc-plated steel fittings have slightly better corrosion resistance than unplated steel fittings. Fittings with a threaded end are also known as hose nipples.
For technical drawings and 3-D models, click on a part number.

- Maximum Pressure: See table
- Maximum Vacuum: Not Rated, except For 2 1/2" to 4" Hose IDs: 26 in. of Hg @ 72° F
- Temperature Range: -20° to 200° F, except For 2 1/2" to 4" Hose IDs: -20° to 400° F
- Attachment Type: Use Band-and-Buckle Clamps, except For 2 1/2" to 4" Hose IDs: Use Worm-Drive Clamps, Bolt Clamps or Band-and-Buckle Clamps
- Specifications Met: See table
For Hose ID | Pipe Size | Body Shape | Max. Pressure | Specifications Met | Each | |
Zinc-Plated Steel | ||||||
---|---|---|---|---|---|---|
2 1/2" | 2 1/2 | Round | 75 psi @ 72° F | ASTM A53 | 0000000 | 000000 |
Metal Cam-and-Groove Hose Couplings for Water

A complete coupling consists of a plug and a socket (both sold separately) that allow you to quickly connect and disconnect medium-to large-diameter hose lines. To connect, insert the plug into the socket and press the levers down. The levers fit snugly into the groove on the plug’s body and force the plug against the gasket to form a tight seal. To disconnect, lift both levers and pull out the plug.
Plugs with male threaded end are also known as F adapters.
Sockets with male threaded end are also known as B couplers.
Aluminum couplings are lighter in weight than brass plugs and sockets. They have good abrasion and corrosion resistance. Note: To ensure a correct fit, make sure that the plug and socket have the same coupling size.
Warning: Relieve all pressure before disconnecting the couplings. Do not use cam-and-groove couplings with compressed air or gas.
For technical drawings and 3-D models, click on a part number.

- Maximum Pressure: See table
- Temperature Range: -65° to 250° F
- Specifications Met: Fed. Spec. A-A-59326
- Compatible With: Andrews Cam-and-Groove Couplings, Dixon Cam-and-Groove Couplings, Ever-Tite Cam-and-Groove Couplings, PT Coupling Cam-and-Groove Couplings
Coupling Size | Plug OD | Pipe Size | Max. Pressure | Each | |
Anodized Aluminum | |||||
---|---|---|---|---|---|
2 1/2 | 3" | 2 1/2 | 200 psi @ 72° F | 00000000 | 000000 |

- Maximum Pressure: See table
- Temperature Range: -65° to 250° F
- Specifications Met: Fed. Spec. A-A-59326
- Compatible With: Andrews Cam-and-Groove Couplings, Dixon Cam-and-Groove Couplings, Ever-Tite Cam-and-Groove Couplings, PT Coupling Cam-and-Groove Couplings
Levers | ||||||||
---|---|---|---|---|---|---|---|---|
Coupling Size | Socket ID | Pipe Size | No. of | Material | Pull Ring Material | Max. Pressure | Each | |
Anodized Aluminum | ||||||||
2 1/2 | 3" | 2 1/2 | 2 | 316 Stainless Steel | Zinc-Plated Steel | 200 psi @ 72° F | 00000000 | 000000 |
Easy-Fit Barbed Hose Fittings for Chemicals
Low-profile barbs and a longer first barb allow for a smoother, easier installation than other barbed fittings. Slide the barbed end into rubber hose and secure with a clamp. Fittings are 316 stainless steel, which has excellent corrosion resistance to withstand a variety of chemicals.
Adapters are also known as hose nipples; they adapt a barbed end to a threaded end.
For technical drawings and 3-D models, click on a part number.

- For Use With: Acetone, Isopropyl Alcohol, Mineral Oil, Sodium Hydroxide
- Maximum Pressure: See table
- Maximum Vacuum: 26 in. of Hg @ 72° F
- Temperature Range: -20° to 400° F
- Attachment Type: Use Worm-Drive Clamps, Bolt Clamps or Band-and-Buckle Clamps
- Specifications Met: ASTM A312
For Hose ID | Pipe Size | Body Shape | Max. Pressure | Each | |
316 Stainless Steel | |||||
---|---|---|---|---|---|
2 1/2" | 2 1/2 | Round | 50 psi @ 72° F | 0000000 | 0000000 |
Metal Cam-and-Groove Hose Couplings for Chemicals and Petroleum

Made of metal, these couplings have better durability than plastic cam-and-groove couplings. A complete coupling consists of a plug and a socket (both sold separately) that allow you to quickly connect and disconnect medium-to large-diameter hose lines. To connect, insert the plug into the socket and press the levers down. The levers fit snugly into the groove on the plug’s body and force the plug against the gasket to form a tight seal. To disconnect, lift both levers and pull out the plug. Couplings are compatible with Andrews, Dixon, Ever-Tite, and PT cam-and-groove couplings.
Plugs with male threaded end are also known as F adapters.
Plugs with female threaded end are also known as A adapters.
Straight sockets with female threaded end are also known as D couplers.
Aluminum plugs and sockets are lighter in weight than 316 stainless steel plugs and sockets. They have good corrosion resistance. 316 stainless steel plugs and sockets have excellent corrosion resistance.
Note: To ensure a correct fit, make sure that the plug and socket have the same coupling size.
Warning: Relieve all pressure before disconnecting the couplings. Do not use cam-and-groove couplings with compressed air or gas.
For technical drawings and 3-D models, click on a part number.

- For Use With: Citric Acid, Diesel Fuel, Gasoline, Hydraulic Fluid
- Maximum Pressure: See table
- Temperature Range: -65° to 250° F
- Compatible With: Andrews Cam-and-Groove, Dixon Cam-and-Groove, Ever-Tite Cam-and-Groove, PT Coupling Cam-and-Groove
- Specifications Met: Fed. Spec. A-A-59326
Coupling Size | Plug OD | Pipe Size | Dash Size | Max. Pressure | Each | |
316 Stainless Steel | ||||||
---|---|---|---|---|---|---|
2 1/2 | 3" | 2 1/2 | 40 | 200 psi @ 72° F | 000000000 | 0000000 |

- For Use With: Citric Acid, Diesel Fuel, Gasoline, Hydraulic Fluid
- Maximum Pressure: See table
- Temperature Range: -65° to 250° F
- Compatible With: Andrews Cam-and-Groove, Dixon Cam-and-Groove, Ever-Tite Cam-and-Groove, PT Coupling Cam-and-Groove
- Specifications Met: Fed. Spec. A-A-59326
Coupling Size | Plug OD | Pipe Size | Dash Size | Max. Pressure | Each | |
Aluminum | ||||||
---|---|---|---|---|---|---|
2 1/2 | 3" | 2 1/2 | 40 | 200 psi @ 72° F | 000000000 | 000000 |

- For Use With: Citric Acid, Diesel Fuel, Gasoline, Hydraulic Fluid
- Maximum Pressure: See table
- Temperature Range: -65° to 250° F
- Compatible With: Andrews Cam-and-Groove, Dixon Cam-and-Groove, Ever-Tite Cam-and-Groove, PT Coupling Cam-and-Groove
- Specifications Met: Fed. Spec. A-A-59326