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 Stainless Steel Threaded Pipe Fittings
Use these fittings in a low-pressure pipe line. 316 stainless steel fittings have excellent corrosion resistance. Adapters with weld end allow for a permanent connection.
Adapters for tanks create an inlet or outlet connection on the surface of any tank, pressure vessel, or drum. Adapters with extension fit tightly into the hole, which keeps the fitting steady during welding.
For technical drawings and 3-D models, click on a part number.
- For Use With: Water, Oil, Gasoline, Diesel Fuel
- Specifications Met: ASTM A182, ASME B1.20.1
316 Stainless Steel | |||||
---|---|---|---|---|---|
Pipe Size | For Hole Dia. | OD | Lg. | Each | |
NPT Female × Weld | |||||
1/4 | 15/16" | 1 1/2" | 5/16" | 0000000 | 000000 |
3/8 | 15/16" | 1 1/2" | 5/16" | 0000000 | 00000 |
1/2 | 1 1/8" | 1 3/4" | 3/8" | 0000000 | 00000 |
3/4 | 1 3/8" | 2 1/8" | 7/16" | 0000000 | 00000 |
1 | 1 5/8" | 2 3/8" | 1/2" | 0000000 | 00000 |
1 1/4 | 2" | 2 11/16" | 1/2" | 0000000 | 00000 |
1 1/2 | 2 1/4" | 3" | 1/2" | 0000000 | 00000 |
2 | 2 5/8" | 3 1/2" | 9/16" | 0000000 | 00000 |
2 1/2 | 3 1/8" | 4 1/16" | 13/16" | 0000000 | 000000 |
3 | 3 5/8" | 4 5/8" | 13/16" | 0000000 | 000000 |
4 | 4 7/8" | 5 3/4" | 1 3/16" | 0000000 | 000000 |
FM-Approved Low-Pressure Cast Iron Unthreaded Pipe Flanges
- For Use With: Air, Diesel Fuel, Gasoline, Natural Gas, Oil, Steam, Water
- Pressure Class: 125
- Specifications Met: ASME B1.20.1, ASME B16.1, ASTM A126, FM Approved
- Pipe Nipples and Pipe: Use Schedule 40 steel
- Fittings: Use Class 125 or 150 iron and steel
FM-approved for fire protection applications, these flanges are cast iron, so they're brittle and can be quickly opened by hitting them with a sledge hammer. Bolt them together with a gasket (not included) to create an access point within a low-pressure pipe line. All are cap flanges, which are also known as blind flanges. Use them in noncorrosive environments.
For technical drawings and 3-D models, click on a part number.
Bolt Hole | |||||||||
---|---|---|---|---|---|---|---|---|---|
Pipe Size | Flange OD | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Max. Pressure | Max. Steam Pressure | Each | |
1 | 4 1/4" | 1/2" | 5/8" | 4 | 3 1/8" | 200 psi @ 72° F | 165 psi @ 300° F | 0000000 | 000000 |
1 1/2 | 5" | 1/2" | 5/8" | 4 | 3 7/8" | 200 psi @ 72° F | 165 psi @ 300° F | 0000000 | 00000 |
2 | 6" | 5/8" | 3/4" | 4 | 4 3/4" | 200 psi @ 72° F | 165 psi @ 300° F | 0000000 | 00000 |
2 1/2 | 7" | 5/8" | 3/4" | 4 | 5 1/2" | 200 psi @ 72° F | 165 psi @ 300° F | 0000000 | 00000 |
3 | 7 1/2" | 5/8" | 3/4" | 4 | 6" | 200 psi @ 72° F | 165 psi @ 300° F | 0000000 | 000000 |
3 1/2 | 8 1/2" | 5/8" | 3/4" | 8 | 7" | 200 psi @ 72° F | 165 psi @ 300° F | 0000000 | 000000 |
4 | 9" | 5/8" | 3/4" | 8 | 7 1/2" | 200 psi @ 72° F | 165 psi @ 300° F | 0000000 | 000000 |
6 | 11" | 3/4" | 7/8" | 8 | 9 1/2" | 200 psi @ 72° F | 165 psi @ 300° F | 0000000 | 000000 |
Low-Pressure Iron and Steel Threaded Pipe Fittings
Use these fittings for low-pressure applications in noncorrosive environments.
Adapters for tanks create an inlet or outlet connection on the surface of any tank, pressure vessel, or drum. Adapters with weld end allow for a permanent connection. Adapters with extension fit tightly into the hole, which keeps the fitting steady during welding.
NPTF (Dryseal) threads, NPSC (National Pipe Straight Coupling) threads, and NPSL (National Pipe Straight Locknut) threads are compatible with NPT threads.
For technical drawings and 3-D models, click on a part number.
- For Use With: Diesel Fuel, Gasoline, Oil, Water
- Specifications Met: ASTM A181, ASME B1.20.1
Pipe Size | For Hole Dia. | OD | Lg. | Material | Each | |
NPT Female × Weld | ||||||
---|---|---|---|---|---|---|
1/8 | 15/16" | 1 5/16" | 3/8" | Carbon Steel | 00000000 | 00000 |
1/8 | 15/16" | 1 1/2" | 9/16" | Carbon Steel | 00000000 | 0000 |
1/4 | 15/16" | 1 5/16" | 3/8" | Carbon Steel | 00000000 | 0000 |
1/4 | 15/16" | 1 1/2" | 9/16" | Carbon Steel | 00000000 | 0000 |
3/8 | 15/16" | 1 5/16" | 3/8" | Carbon Steel | 00000000 | 0000 |
3/8 | 15/16" | 1 1/2" | 9/16" | Carbon Steel | 00000000 | 0000 |
1/2 | 1 1/8" | 1 5/8" | 7/16" | Carbon Steel | 00000000 | 0000 |
1/2 | 1 1/8" | 1 3/4" | 5/8" | Carbon Steel | 00000000 | 0000 |
3/4 | 1 5/16" | 1 15/16" | 1/2" | Carbon Steel | 00000000 | 0000 |
3/4 | 1 3/8" | 2 1/8" | 11/16" | Carbon Steel | 00000000 | 0000 |
1 | 1 5/8" | 2 3/8" | 3/4" | Carbon Steel | 00000000 | 0000 |
1 | 1 11/16" | 2 1/4" | 9/16" | Carbon Steel | 00000000 | 0000 |
1 1/4 | 2" | 2 9/16" | 9/16" | Carbon Steel | 00000000 | 00000 |
1 1/4 | 2" | 2 11/16" | 3/4" | Carbon Steel | 00000000 | 0000 |
1 1/2 | 2 1/4" | 2 13/16" | 9/16" | Carbon Steel | 00000000 | 0000 |
1 1/2 | 2 1/4" | 3" | 3/4" | Carbon Steel | 00000000 | 0000 |
2 | 2 5/8" | 3 3/8" | 5/8" | Carbon Steel | 00000000 | 0000 |
2 | 2 5/8" | 3 1/2" | 27/32" | Carbon Steel | 00000000 | 00000 |
2 1/2 | 3 1/8" | 4 1/16" | 1" | Carbon Steel | 00000000 | 00000 |
3 | 3 5/8" | 4 5/8" | 1" | Carbon Steel | 00000000 | 00000 |
4 | 4 11/16" | 5 13/16" | 1 7/32" | Carbon Steel | 00000000 | 00000 |
- For Use With: Diesel Fuel, Gasoline, Oil, Water
- Specifications Met: ASTM A105, ASTM A181
Pipe Size | For Hole Dia. | OD | Lg. | Material | Each | |
NPT Female × Weld | ||||||
---|---|---|---|---|---|---|
1/4 | 3/4" | 1 1/4" | 5/16" | Carbon Steel | 00000000 | 00000 |
3/8 | 15/16" | 1 1/4" | 3/8" | Carbon Steel | 00000000 | 00000 |
1/2 | 1 1/8" | 1 1/2" | 1/2" | Carbon Steel | 00000000 | 0000 |
3/4 | 1 3/8" | 1 3/4" | 5/8" | Carbon Steel | 00000000 | 0000 |
1 | 1 11/16" | 2 1/8" | 5/8" | Carbon Steel | 00000000 | 0000 |
1 1/4 | 2" | 2 1/2" | 3/4" | Carbon Steel | 00000000 | 0000 |
1 1/2 | 2 3/8" | 3" | 3/4" | Carbon Steel | 00000000 | 00000 |
2 | 2 7/8" | 3 1/2" | 13/16" | Carbon Steel | 00000000 | 00000 |
2 1/2 | 3 1/2" | 4 1/4" | 1" | Carbon Steel | 00000000 | 00000 |
3 | 4 1/8" | 4 3/4" | 1" | Carbon Steel | 00000000 | 00000 |
4 | 5 1/8" | 5 3/4" | 1 3/16" | Carbon Steel | 00000000 | 00000 |
- For Use With: Diesel Fuel, Gasoline, Oil, Water
- Pipe Nipples and Pipe: Use Schedule 40 steel
- For Use With: Air, Diesel Fuel, Gasoline, Oil, Steam, Water
- Pipe Nipples and Pipe: Use Schedule 40 steel
Pipe Size | ||||||
---|---|---|---|---|---|---|
(A) | (B) | Lg. | Hex Wd. | Material | Each | |
NPT Male × NPT Female | ||||||
1 1/2 | 1/2 | 1 7/32" | 1 3/8" | Iron | 0000000 | 000000 |
1 1/2 | 3/4 | 1 5/16" | 1 23/32" | Iron | 0000000 | 00000 |
1 1/2 | 1 | 1 5/16" | 1 23/32" | Iron | 0000000 | 00000 |
2 | 3/8 | 1 5/16" | 1 3/8" | Iron | 0000000 | 00000 |
2 | 1/2 | 1 5/16" | 1 3/8" | Iron | 0000000 | 00000 |
2 | 3/4 | 1 3/8" | 1 11/16" | Iron | 0000000 | 00000 |
2 | 1 | 1 11/16" | 2 1/32" | Iron | 0000000 | 00000 |
2 | 1 1/4 | 1 9/16" | 2 19/32" | Iron | 0000000 | 00000 |
2 | 1 1/2 | 1 25/32" | 2 17/32" | Iron | 0000000 | 00000 |
2 1/2 | 2 | 1 25/32" | 2 17/32" | Iron | 0000000 | 00000 |
3 | 1 | 1 9/16" | 2 5/16" | Iron | 0000000 | 00000 |
3 | 1 1/2 | 1 21/32" | 2 11/16" | Iron | 0000000 | 00000 |
3 | 2 | 1 3/4" | 3 1/4" | Iron | 0000000 | 00000 |
4 | 1 | 1 7/8" | 2 7/8" | Iron | 0000000 | 00000 |
4 | 2 | 1 13/32" | 2 9/16" | Iron | 0000000 | 00000 |
4 | 2 1/2 | 2 11/32" | 4 5/16" | Iron | 0000000 | 000000 |
4 | 3 | 2 7/16" | 4 3/4" | Iron | 0000000 | 00000 |
Low-Pressure Aluminum Threaded Pipe Fittings
In addition to being lightweight, these aluminum fittings offer good corrosion resistance. Use them in low-pressure flow applications. To prevent cracking, do not tighten more than a 1/4-turn past hand tight.
Adapters for tanks weld onto the surface of any tank, pressure vessel, or drum to create a permanent inlet or outlet connection. Adapters with extended lip fit tightly into the hole, which keeps the fitting steady during welding.
For technical drawings and 3-D models, click on a part number.
- For Use With: Water, Oil, Gasoline, Diesel Fuel
- Specifications Met: ASTM B221
- Pipe Nipples and Pipe: Use Schedule 40 aluminum
Pipe Size | For Hole Dia. | OD | Lg. | Each | |
NPT Female × Weld | |||||
---|---|---|---|---|---|
1/8 | 7/8" | 1 5/16" | 1/4" | 0000000 | 00000 |
1/4 | 7/8" | 1 5/16" | 1/4" | 0000000 | 00000 |
3/8 | 1 3/16" | 1 7/16" | 1/4" | 0000000 | 00000 |
1/2 | 1 1/8" | 1 5/8" | 1/4" | 0000000 | 00000 |
3/4 | 1 5/16" | 2" | 1/4" | 0000000 | 00000 |
1 | 1 11/16" | 2 1/4" | 1/4" | 0000000 | 00000 |
1 1/4 | 1 15/16" | 2 9/16" | 5/16" | 0000000 | 00000 |
1 1/2 | 2 1/4" | 2 15/16" | 5/16" | 0000000 | 00000 |
2 | 2 5/8" | 3 3/8" | 5/16" | 0000000 | 00000 |
3 | 3 11/16" | 4 5/8" | 3/4" | 0000000 | 000000 |
4 | 4 3/4" | 5 13/16" | 7/8" | 0000000 | 000000 |
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 flanged end are also known as PFA adapters. Bolt the flanged end to another same-size flange with a gasket (sold separately).
Sockets with flanged end are also known as PFC couplers. Bolt the flanged end to another same-size flange with a gasket (sold separately).
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:
Aluminum: ASME B16.24, Fed. Spec. A-A-59326
316 Stainless Steel: ASME B16.5, Fed. Spec. A-A-59326
Bolt Hole | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Coupling Size | Plug OD | Pipe Size | Dash Size | Flange OD | Flanged Connection Surface | Pressure Class | Max. Pressure | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Each | |
Aluminum | |||||||||||||
2 | 2 1/2" | 2 | 32 | 6" | Flat | 150 | 250 psi @ 72° F | 5/8" | 3/4" | 4 | 4 3/4" | 000000000 | 0000000 |
3 | 3 5/8" | 3 | 48 | 7 1/2" | Flat | 150 | 200 psi @ 72° F | 5/8" | 3/4" | 4 | 6" | 000000000 | 000000 |
4 | 4 3/4" | 4 | 64 | 9" | Flat | 150 | 150 psi @ 72° F | 5/8" | 3/4" | 8 | 7 1/2" | 000000000 | 000000 |
6 | 6 15/16" | 6 | 96 | 11" | Flat | 150 | 75 psi @ 72° F | 3/4" | 7/8" | 8 | 9 1/2" | 000000000 | 000000 |
316 Stainless Steel | |||||||||||||
2 | 2 1/2" | 2 | 32 | 6" | Raised | 150 | 250 psi @ 72° F | 5/8" | 3/4" | 4 | 4 3/4" | 000000000 | 000000 |
3 | 3 5/8" | 3 | 48 | 7 1/2" | Raised | 150 | 200 psi @ 72° F | 5/8" | 3/4" | 4 | 6" | 000000000 | 000000 |
4 | 4 3/4" | 4 | 64 | 9" | Raised | 150 | 150 psi @ 72° F | 5/8" | 3/4" | 8 | 7 1/2" | 000000000 | 000000 |
6 | 6 15/16" | 6 | 96 | 11" | Flat | 150 | 75 psi @ 72° F | 3/4" | 7/8" | 8 | 9 1/2" | 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:
Aluminum: ASME B16.24, Fed. Spec. A-A-59326
316 Stainless Steel: ASME B16.5, Fed. Spec. A-A-59326
Sockets | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Bolt Hole | Replacement Gaskets | Replacement Levers | ||||||||||||||||
Coupling Size | Socket ID | Pipe Size | Dash Size | Flange OD | Pressure Class | No. of Levers | Max. Pressure | For Bolt Dia. | Dia. | No. of | Bolt Circle Dia. | Each | Pkg. Qty. | Pkg. | Each | |||
Aluminum with Brass Levers and Zinc-Plated Steel Pull Rings | ||||||||||||||||||
Flat Flanged Connection Surface | ||||||||||||||||||
2 | 2 1/2" | 2 | 32 | 6" | 150 | 2 | 250 psi @ 72° F | 5/8" | 3/4" | 4 | 4 3/4" | 000000000 | 0000000 | 10 | 0000000 | 00000 | 000000 | 00 |
3 | 3 5/8" | 3 | 48 | 7 1/2" | 150 | 2 | 200 psi @ 72° F | 5/8" | 3/4" | 4 | 6" | 000000000 | 000000 | 10 | 0000000 | 00000 | 000000000 | 00000 |
4 | 4 3/4" | 4 | 64 | 9" | 150 | 2 | 150 psi @ 72° F | 5/8" | 3/4" | 8 | 7 1/2" | 000000000 | 000000 | 10 | 0000000 | 00000 | 000000000 | 0000 |
6 | 6 15/16" | 6 | 96 | 11" | 150 | 2 | 75 psi @ 72° F | 3/4" | 7/8" | 8 | 9 1/2" | 000000000 | 000000 | 5 | 0000000 | 00000 | 000000000 | 00000 |
316 Stainless Steel with 316 Stainless Steel Levers and 304 Stainless Steel Pull Rings | ||||||||||||||||||
Raised Flanged Connection Surface | ||||||||||||||||||
2 | 2 1/2" | 2 | 32 | 6" | 150 | 2 | 250 psi @ 72° F | 5/8" | 3/4" | 4 | 4 3/4" | 000000000 | 000000 | 10 | 0000000 | 0000 | 000000000 | 00000 |
3 | 3 5/8" | 3 | 48 | 7 1/2" | 150 | 2 | 200 psi @ 72° F | 5/8" | 3/4" | 4 | 6" | 000000000 | 000000 | 10 | 0000000 | 00000 | 000000000 | 00000 |
4 | 4 3/4" | 4 | 64 | 9" | 150 | 2 | 150 psi @ 72° F | 5/8" | 3/4" | 8 | 7 1/2" | 000000000 | 000000 | 10 | 0000000 | 00000 | 000000000 | 00000 |
6 | 6 15/16" | 6 | 96 | 11" | 150 | 2 | 75 psi @ 72° F | 3/4" | 7/8" | 8 | 9 1/2" | 000000000 | 00000000 | 5 | 0000000 | 00000 | 000000000 | 00000 |