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. 304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.
Plugs with magnet attract metal debris that could otherwise damage your system.
NPTF (Dryseal) 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: Air, Steam, Oil, Water, Natural Gas
- Pressure Class:
NPTF: 150 - Specifications Met:
Metric and BSPP: DIN 908 - Pipe Nipples and Pipe:
NPTF: Use Schedule 40 stainless steel - Flanges:
NPTF: Use Class 150 stainless steel
Extreme-Pressure Stainless Steel Threaded Pipe Fittings
With the strength to handle extreme pressures, these fittings can be used to connect equipment in hydraulic fluid lines. 316 stainless steel fittings have excellent corrosion resistance.
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 a gasket to prevent leaks.
For technical drawings and 3-D models, click on a part number.
- For Use With: See table
- Specifications Met: See table
316 Stainless Steel | |||||||
---|---|---|---|---|---|---|---|
Pipe Size | Dash Size | Max. Pressure | Max. Steam Pressure | For Use With | Specifications Met | Each | |
NPTF Female | |||||||
1 1/4 | 20 | 3,000 psi @ 72° F | 3,000 psi @ 300° F | Hydraulic Fluid, Oil, Steam, Water | ASTM A479 | 000000000 | 0000000 |
- Specifications Met: See table
- For Use With: See table
316 Stainless Steel | ||||||||
---|---|---|---|---|---|---|---|---|
Pipe Size | Dash Size | Lg. | Max. Pressure | Max. Steam Pressure | For Use With | Specifications Met | Each | |
NPTF Male | ||||||||
1 1/4 | 20 | 2 31/64" | 3,600 psi @ 72° F | 3,600 psi @ 300° F | Hydraulic Fluid, Oil, Steam, Water | ASTM A479 | 000000000 | 0000000 |
(SAE Straight) Male
Threads with Gasket
- For Use With: See table
- Specifications Met: See table
316 Stainless Steel | |||||||||
---|---|---|---|---|---|---|---|---|---|
Pipe Size (A) | Dash Size (A) | Thread Size (B) | Dash Size (B) | Max. Pressure | Max. Steam Pressure | For Use With | Specifications Met | Each | |
NPTF Male × UN/UNF (SAE Straight) Male | |||||||||
1 1/4 | 20 | 1 5/8"-12 | 20 | 3,000 psi @ 72° F | 3,000 psi @ 200° F | Hydraulic Fluid, Oil, Steam, Water | SAE J514 | 000000000 | 0000000 |
1 1/4 | 20 | 1 7/8"-12 | 24 | 2,400 psi @ 72° F | 2,400 psi @ 200° F | Hydraulic Fluid, Oil, Steam, Water | SAE J514 | 000000000 | 000000 |
- Specifications Met: See table
- For Use With: See table
Pipe Size | Dash Size | 316 Stainless Steel | |||||||
---|---|---|---|---|---|---|---|---|---|
(A) | (B) | (A) | (B) | Max. Pressure | Max. Steam Pressure | For Use With | Specifications Met | Each | |
NPTF Female × NPTF Male | |||||||||
1 1/4 | 1 | 20 | 16 | 3,000 psi @ 72° F | 3,000 psi @ 300° F | Hydraulic Fluid, Oil, Steam, Water | ASTM A479 | 000000000 | 0000000 |
- For Use With: Hydraulic Fluid, Oil, Steam, Water
- Specifications Met:
NPT × NPT: SAE J514
NPTF × NPTF: ASTM A479
Pipe Size | Dash Size | 316 Stainless Steel | |||||
---|---|---|---|---|---|---|---|
(A) | (B) | (A) | (B) | Max. Pressure | Max. Steam Pressure | Each | |
NPTF Male × NPTF Female | |||||||
1 1/4 | 1 | 20 | 16 | 3,600 psi @ 72° F | 3,600 psi @ 300° F | 000000000 | 0000000 |
- For Use With: See table
- Specifications Met: See table
Pipe Size | Dash Size | 316 Stainless Steel | |||||||
---|---|---|---|---|---|---|---|---|---|
(A) | (B) | (A) | (B) | Max. Pressure | Max. Steam Pressure | For Use With | Specifications Met | Each | |
NPTF Female | |||||||||
1 1/4 | 1 | 20 | 16 | 3,000 psi @ 72° F | 3,000 psi @ 300° F | Hydraulic Fluid, Oil, Steam, Water | ASTM A479 | 000000000 | 0000000 |
- For Use With: See table
- Specifications Met: See table
Pipe Size | Dash Size | 316 Stainless Steel | |||||||
---|---|---|---|---|---|---|---|---|---|
(A) | (B) | (A) | (B) | Max. Pressure | Max. Steam Pressure | For Use With | Specifications Met | Each | |
NPTF Male | |||||||||
1 1/4 | 1 | 20 | 16 | 3,600 psi @ 72° F | 3,600 psi @ 300° F | Hydraulic Fluid, Oil, Steam, Water | ASTM A479 | 000000000 | 0000000 |
- For Use With: Hydraulic Fluid, Oil, Water
- Specifications Met:
BSPP: ISO 1179, ISO 8434-6
316 Stainless Steel | ||||
---|---|---|---|---|
Pipe Size | Dash Size | Max. Pressure | Each | |
NPTF Female | ||||
1 1/4 | 20 | 2,400 psi @ 72° F | 000000000 | 0000000 |
Low-Pressure Galvanized Iron and Steel Threaded Pipe Fittings with Sealant
The male threads on these fittings have a sealant applied for extra leak protection. Fittings are made of galvanized iron or steel, which have fair corrosion resistance. Also known as Pressure Class 125 or 150 fittings, they are for use in low-pressure applications.
NPTF (Dryseal) threads are compatible with NPT threads.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Oil, Natural Gas, Steam, Water
- Pressure Class: 150
- Specifications Met: See table
- Pipe Nipples and Pipe: Use Schedule 40 galvanized steel
- Flanges: Use Class 150 galvanized steel
Pipe Size | Drive Size | Max. Pressure | Max. Steam Pressure | Specifications Met | Each | |
NPTF Male | ||||||
---|---|---|---|---|---|---|
1 1/4 | 3/4" | 150 psi @ 72° F | 150 psi @ 360° F | ASME B16.14 | 0000000 | 000000 |
Medium-Pressure Iron and Steel Threaded Pipe Fittings
With better strength than our low-pressure iron and steel pipe fittings, these can handle medium-pressure applications. They are for use in noncorrosive environments.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Pressure Class : 300
- Specifications Met: See Table
- Pipe Nipples and Pipe: Use Schedule 80 steel
- Flanges: Use Class 300 or 600 steel
Pipe Size | Drive Size | Max. Pressure | Max. Steam Pressure | Material | Specifications Met | Each | |
NPTF Male | |||||||
---|---|---|---|---|---|---|---|
1 1/4 | 3/4" | 300 psi @ 72° F | 300 psi @ 550° F | Steel | ASME B16.14 | 00000000 | 00000 |
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.
For technical drawings and 3-D models, click on a part number.
- For Use With:
NPTF: Air, Hydraulic Fluid, Water
Metric: Air, Hydraulic Fluid, Oil, Water - Specifications Met:
NPTF: ASTM A108
Metric: DIN 7631, ISO 6149, ISO 9974
Pipe Size | Dash Size | Max. Pressure | Material | Each | |
NPTF Female | |||||
---|---|---|---|---|---|
1 1/4 | 20 | 2,500 psi @ 72° F | Zinc Plated Steel | 000000000 | 000000 |
- For Use With: See table
- Specifications Met:
NPTF and UN/UNF (SAE Straight): ASTM A108
BSPP: ISO 1179, ISO 8434-6
BSPT: DIN EN 10226-1, ISO 7-1
Pipe Size | Dash Size | Max. Pressure | Material | For Use With | Each | |
NPTF Male | ||||||
---|---|---|---|---|---|---|
1 1/4 | 20 | 3,000 psi @ 72° F | Zinc Plated Steel | Air, Hydraulic Fluid, Water | 000000000 | 000000 |
- For Use With: See table
- Specifications Met: See table
Pipe Size | Dash Size | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
(A) | (B) | (A) | (B) | Lg. | Max. Pressure | Material | For Use With | Specifications Met | Each | |
NPTF Female × NPTF Male | ||||||||||
1 1/4 | 1 | 20 | 16 | 2 15/32" | 2,500 psi @ 72° F | Zinc Plated Steel | Air, Hydraulic Fluid, Water | ASTM A108 | 000000000 | 000000 |
- For Use With: Air, Hydraulic Fluid, Water
- Specifications Met: ASTM A108
Pipe Size | Dash Size | ||||||
---|---|---|---|---|---|---|---|
(A) | (B) | (A) | (B) | Max. Pressure | Material | Each | |
NPTF Male × NPTF Female | |||||||
1 1/4 | 1 | 20 | 16 | 3,000 psi @ 72° F | Zinc Plated Steel | 000000000 | 000000 |
- For Use With:
NPTF: Air, Hydraulic Fluid, Water
Metric: Air, Hydraulic Fluid, Oil, Water - Specifications Met:
NPTF: ASTM A108
Metric: DIN 7631, ISO 6149, ISO 9974
Pipe Size | Dash Size | ||||||
---|---|---|---|---|---|---|---|
(A) | (B) | (A) | (B) | Max. Pressure | Material | Each | |
NPTF Female | |||||||
1 1/4 | 1 | 20 | 16 | 2,500 psi @ 72° F | Zinc Plated Steel | 0000000 | 000000 |
- For Use With:
NPTF: Air, Hydraulic Fluid, Water
BSPP and BSPT: Air, Hydraulic Fluid, Oil, Water - Specifications Met:
NPTF: ASTM A108
BSPP: ISO 1179, ISO 8434-6
BSPT: DIN EN 10226-1, ISO 7-1
Pipe Size | Dash Size | ||||||
---|---|---|---|---|---|---|---|
(A) | (B) | (A) | (B) | Max. Pressure | Material | Each | |
NPTF Male | |||||||
1 1/4 | 1 | 20 | 16 | 3,000 psi @ 72° F | Zinc Plated Steel | 000000000 | 000000 |
- For Use With: Air, Hydraulic Fluid, Water
- Specifications Met: ASTM A576
Pipe Size | Dash Size | Max. Pressure | Material | Each | |
NPTF Female | |||||
---|---|---|---|---|---|
1 1/4 | 20 | 1,500 psi @ 72° F | Zinc Plated Steel | 000000000 | 000000 |
- For Use With: Air, Hydraulic Fluid, Water
- Specifications Met: ASTM A576
Pipe Size | Dash Size | Max. Pressure | Material | Each | |
NPTF Male | |||||
---|---|---|---|---|---|
1 1/4 | 20 | 2,500 psi @ 72° F | Zinc Plated Steel | 000000000 | 000000 |
- For Use With: Air, Hydraulic Fluid, Water
- Specifications Met: ASTM A576
Pipe Size (A) | Dash Size (A) | Pipe 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 |
- For Use With: Air, Hydraulic Fluid, Water
- Specifications Met: ASTM A576
Pipe Size | Dash Size | Max. Pressure | Material | Each | |
NPTF Female | |||||
---|---|---|---|---|---|
1 1/4 | 20 | 1,500 psi @ 72° F | Zinc Plated Steel | 000000000 | 000000 |
- For Use With: Air, Hydraulic Fluid, Water
- Specifications Met: ASTM A576
Pipe Size | Dash Size | Max. Pressure | Material | Each | |
NPTF Male | |||||
---|---|---|---|---|---|
1 1/4 | 20 | 2,500 psi @ 72° F | Zinc Plated Steel | 000000000 | 000000 |
- For Use With:
NPTF and UN/UNF (SAE Straight): Air, Hydraulic Fluid, Water
Metric, BSPP and BSPT: Air, Hydraulic Fluid, Oil, Water - Specifications Met: See table
Pipe Size | Dash Size | Drive Size | Max. Pressure | Material | Specifications Met | Each | |
NPTF Male | |||||||
---|---|---|---|---|---|---|---|
1 1/4 | 20 | 3/4" | 3,000 psi @ 72° F | Zinc Plated Steel | ASTM A108 | 000000000 | 000000 |
- For Use With: See table
- Specifications Met: See table
Pipe Size | Dash Size | Plug Construction | Max. Pressure | Material | For Use With | Specifications Met | Each | |
NPTF Male | ||||||||
---|---|---|---|---|---|---|---|---|
1 1/4 | 20 | Hollow | 3,000 psi @ 72° F | Zinc Plated Steel | Air, Hydraulic Fluid, Water | ASTM A108 | 000000000 | 000000 |
Extreme-Pressure Steel Threaded Pipe Fittings
The strongest steel fittings we offer, these can withstand extreme-pressure applications.
Plugs with a 7/8" taper sit flush to the surface for a low profile.
NPTF (Dryseal) threads are compatible with NPT threads.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
- Temperature Range: -100° to 450° F
- Specifications Met: ASTM A574, ASME B1.20.3
- Pipe Nipples and Pipe: Use Schedule XXH steel
- Flanges: Use Class 1500 steel
Steel | ||||
---|---|---|---|---|
Pipe Size | Dash Size | Max. Pressure | Each | |
NPTF Male | ||||
1 1/4 | 20 | 5,000 psi @ 72° 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.
NPTF (Dryseal) threads are compatible with NPT threads.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Water, Natural Gas, Oil
- Specifications Met: See table
Pipe Size | Max. Pressure | Each | |
NPTF Female | |||
---|---|---|---|
1 1/4 | 1,000 psi @ 72° F | 00000000 | 000000 |
- For Use With: Air, Water, Natural Gas, Oil
- Specifications Met: See table
Pipe Size | Max. Pressure | Each | |
NPTF Male | |||
---|---|---|---|
1 1/4 | 1,000 psi @ 72° F | 000000000 | 000000 |
- For Use With: Air, Water, Oil, Natural Gas
Pipe Size | Max. Pressure | Each | |
NPTF Female | |||
---|---|---|---|
1 1/4 | 1,000 psi @ 72° F | 000000000 | 000000 |
- For Use With: Air, Natural Gas, Oil, Water
Hollow | |||
---|---|---|---|
Pipe Size | Max. Pressure | Each | |
NPTF Male | |||
1 1/4 | 1,000 psi @ 72° F | 000000000 | 000000 |
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. NPTF (Dryseal) 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: Water, Oil, Gasoline, Diesel Fuel
- Pipe Nipples and Pipe: Use Schedule 40 aluminum
Pipe Size | For Hole Dia. | OD | Lg. | For Tank OD | Each | |
NPTF Female × Weld | ||||||
---|---|---|---|---|---|---|
1 1/4 | 1 3/4" | 2 13/16" | 1/4" | 36" | 0000000 | 00000 |
37° Flared Fittings for Steel Tubing
- Tubing: Use with seamless steel
- Specifications Met: SAE J514
Also known as JIC (Joint Industrial Council) fittings, these provide a tight metal-to-metal seal on tubing that is flared to 37°. They require a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately. Fittings are zinc-plated steel for fair corrosion resistance.
NPTF (Dryseal) threads are compatible with NPT threads.
For technical drawings and 3-D models, click on a part number.
- For Use With: See Table
- Temperature Range: See Table
For Tube OD | Pipe Size | For Use With | Material | Max. Pressure | Temp. Range, °F | Each | |
NPTF Threads | |||||||
---|---|---|---|---|---|---|---|
1 1/4" | 1 1/4 | Air, Fuel Oil, Hydraulic Fluid, Mineral Oil | Zinc-Plated Steel | 2,000 psi @ 72° F | -60° to 400° | 00000000 | 000000 |
- For Use With: Air, Fuel Oil, Hydraulic Fluid, Mineral Oil
- Temperature Range: -60° to 400° F
For Tube OD | Pipe Size | Material | Max. Pressure | Each | |
NPTF Threads | |||||
---|---|---|---|---|---|
1 1/4" | 1 1/4 | Zinc-Plated Steel | 2,000 psi @ 72° F | 00000000 | 000000 |
- For Use With: Air, Fuel Oil, Hydraulic Fluid, Mineral Oil
- Temperature Range: -60° to 400° F
Use these sleeves with a nut and fitting to provide a tight metal-to-metal seal on steel tubing that is flared to 37°. Sleeves are zinc-plated steel for fair corrosion resistance. They are also known as ferrules.
For Tube OD | ||||
---|---|---|---|---|
Inch | Sleeve Material | Max. Pressure | Each | |
Inch Sleeves | ||||
1 1/4" | Zinc-Plated Steel | 2,000 psi @ 72° F | 00000000 | 00000 |
- For Use With: Air, Fuel Oil, Hydraulic Fluid, Mineral Oil
- Temperature Range: -60° to 400° F
For Tube OD | Nut Material | Max. Pressure | Each | |
1 1/4" | Zinc-Plated Steel | 2,000 psi @ 72° F | 00000000 | 000000 |
Open-Flow Quick-Disconnect Hose Couplings for Air and Water
Couplings allow for maximum flow because there’s no shut-off valve in the plug or the socket. A complete coupling consists of a plug and a socket (both sold separately) that connect and disconnect quickly. Use them if you need frequent access to a line. All Open-Flow plugs are compatible with any of the Open-Flow sockets of the same coupling size, regardless of the pipe size. They are compatible with Hansen ST, Parker ST, and Perfecting E couplings.
Sockets are sleeve-lock style. To connect, slide back the sleeve on the socket, insert the plug, and release the sleeve. To disconnect, slide back the sleeve and pull out the plug.
303 stainless steel plugs and sockets have very good corrosion resistance. They’re the best choice for high-humidity environments.
Note: To ensure a correct fit, make sure that the plug and socket have the same coupling size.
Warning: There is no valve in these couplings. Stop the air and water flow before you disconnect the line.
- Maximum Pressure: See table
- Temperature Range: -40° to 250° F
- Compatible With: Hansen ST Couplings, Parker ST Couplings, Perfecting E Couplings
For Plug Tip | ||||||
---|---|---|---|---|---|---|
Coupling Size | Lg. | Dia. | Pipe Size | Max. Pressure | Each | |
303 Stainless Steel | ||||||
1 1/4 | 1/8" | 1 7/16" | 1 1/4 | 2,200 psi @ 72° F | 00000000 | 0000000 |
Natural and LP Gas Hose Fittings
Use these couplings when you need frequent access to a gas line. A complete coupling consists of a plug and a socket (sold separately or in a set) that connect and disconnect quickly. All of the natural and LP gas plugs are compatible with any of the natural and LP gas sockets of the same coupling size, regardless of the pipe size. Plugs and sockets are brass for good corrosion resistance. These couplings are rated ANSI Z21.41/CSA 6.9 for use with gas fuel appliances. CSA-US and CSA Certified, they also meet U.S. and Canadian safety standards.
Plugs are also known as nipples. They have a heat-sensitive fuse that will stop gas flow in the event of a fire.
Sockets have a shut-off valve that stops the flow when the coupling is separated, so gas won’t leak from the line. They are sleeve-lock style. To connect, slide back the sleeve on the socket, insert the plug, and release the sleeve. To disconnect, slide back the sleeve and pull out the plug.
NPTF (Dryseal) threads are compatible with NPT threads.
Warning: Stop the flow before you disconnect the line.
For technical drawings and 3-D models, click on a part number.
- Maximum Pressure: 0.5 psi @ 72° F
- Temperature Range: -40° to 200° F
- Specifications Met: ANSI Z21.41/CSA 6.9, CSA Certified, CSA-US Certified
Plug Tip | ||||||
---|---|---|---|---|---|---|
Coupling Size | Lg. | Dia. | Pipe Size | Thread Type | Each | |
Brass | ||||||
1 1/4 | 19/32" | 1 1/4" | 1 1/4 | NPTF | 00000000 | 000000 |
- Maximum Pressure: 0.5 psi @ 72° F
- Temperature Range: -40° to 200° F
- Specifications Met: ANSI Z21.41/CSA 6.9, CSA Certified, CSA-US Certified
For Plug Tip | ||||||
---|---|---|---|---|---|---|
Coupling Size | Lg. | Dia. | Pipe Size | Thread Type | Each | |
Brass | ||||||
1 1/4 | 19/32" | 1 1/4" | 1 1/4 | NPTF | 00000000 | 0000000 |
- Maximum Pressure: 0.5 psi @ 72° F
- Temperature Range: -40° to 200° F
- Specifications Met: ANSI Z21.41/CSA 6.9, CSA Certified, CSA-US Certified
Plug Tip | Pipe Size | ||||||
---|---|---|---|---|---|---|---|
Coupling Size | Lg. | Dia. | Plug | Socket | Thread Type | Each | |
Brass | |||||||
1 1/4 | 39/64" | 1 1/4" | 1 1/4 | 1 1/4 | NPTF | 00000000 | 0000000 |