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| O-Ring Face Seal |
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| Threaded |
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| Flared |
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| Socket Connect |
Thread Type Thread Type |
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Thread Size Thread Size |
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For Use With For Use With |
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For Tube Material For Tube Material |
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Material Material |
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Maximum Pressure Maximum Pressure |
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Maximum Vacuum Maximum Vacuum |
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Length Length |
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Nut Material Nut Material |
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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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O-Ring Face Seal Fittings for Steel Tubing
- For Use With: Air, Hydraulic Fluid
- Temperature Range: -30° to 250° F, except BSPP fittings are -20° to 230° F
- Tubing: Use with seamless steel
- Specifications Met: SAE J1453
A tube adapter sits flush against the flat face of the fitting so you can slide the tubing and fitting sideways to disconnect in cramped spaces. Fittings are also known as zero-clearance fittings. To install, weld a tube adapter to the tubing with a brazing ring (sold separately), then mate the tube adapter to the fitting and screw on the nut. As the nut is tightened, the tube adapter compresses the O-ring, creating a strong seal. Fittings are zinc-plated steel for fair corrosion resistance. Nuts and tube adapters are sold separately.
NPTF (Dryseal) threads are compatible with NPT threads. BSPP and UN/UNF (SAE) male threads have a gasket to prevent leaks. UN/UNF (SAE) threads are also known as O-ring boss threads.
For technical drawings and 3-D models, click on a part number.
UN/UNF (SAE)
Male Threads with Gasket
| For Tube OD | Pipe Size | Thread Size | Material | Gasket Material | Max. Pressure | Each | |
BSPP Threads | |||||||
|---|---|---|---|---|---|---|---|
| 1/4" | 1/4 | __ | Zinc-Plated Steel | Buna-N Rubber | 6,000 psi @ 72° F | 0000000 | 00000 |
| 3/8" | 1/4 | __ | Zinc-Plated Steel | Buna-N Rubber | 6,000 psi @ 72° F | 0000000 | 0000 |
| 3/8" | 3/8 | __ | Zinc-Plated Steel | Buna-N Rubber | 5,000 psi @ 72° F | 0000000 | 0000 |
NPTF Threads | |||||||
| 1/4" | 1/4 | __ | Zinc-Plated Steel | __ | 6,000 psi @ 72° F | 0000000 | 0000 |
| 3/8" | 3/8 | __ | Zinc-Plated Steel | __ | 6,000 psi @ 72° F | 0000000 | 0000 |
| 1/2" | 1/2 | __ | Zinc-Plated Steel | __ | 6,000 psi @ 72° F | 0000000 | 00000 |
UN/UNF (SAE) Threads | |||||||
| 1/4" | __ | 7/16"-20 | Zinc-Plated Steel | Buna-N Rubber | 6,000 psi @ 72° F | 0000000 | 0000 |
| 3/8" | __ | 9/16"-18 | Zinc-Plated Steel | Buna-N Rubber | 6,000 psi @ 72° F | 00000000 | 0000 |
| 1/2" | __ | 3/4"-16 | Zinc-Plated Steel | Buna-N Rubber | 6,000 psi @ 72° F | 00000000 | 0000 |
UN/UNF (SAE)
Male Threads with Gasket
Fittings that swivel until tightened rotate 360° for easy installation.
| For Tube OD | Pipe Size | Thread Size | Material | Gasket Material | Max. Pressure | Each | |
NPT, NPTF Threads | |||||||
|---|---|---|---|---|---|---|---|
| 1/4" | 1/4 | __ | Zinc-Plated Steel | __ | 6,000 psi @ 72° F | 0000000 | 000000 |
| 3/8" | 3/8 | __ | Zinc-Plated Steel | __ | 6,000 psi @ 72° F | 00000000 | 00000 |
| 1/2" | 1/2 | __ | Zinc-Plated Steel | __ | 6,000 psi @ 72° F | 00000000 | 00000 |
UN/UNF (SAE) Threads | |||||||
| 1/4" | __ | 7/16"-20 | Zinc-Plated Steel | Buna-N Rubber | 6,000 psi @ 72° F | 0000000 | 00000 |
| 3/8" | __ | 9/16"-18 | Zinc-Plated Steel | Buna-N Rubber | 6,000 psi @ 72° F | 00000000 | 00000 |
| 1/2" | __ | 3/4"-16 | Zinc-Plated Steel | Buna-N Rubber | 6,000 psi @ 72° F | 00000000 | 00000 |
Fittings that swivel until tightened rotate 360° for easy installation.
| For Tube OD | Pipe Size | Thread Size | Material | Max. Pressure | Each | |
NPT, NPTF Threads | ||||||
|---|---|---|---|---|---|---|
| 1/4" | 1/4 | __ | Zinc-Plated Steel | 6,000 psi @ 72° F | 0000000 | 000000 |
| 3/8" | 1/4 | __ | Zinc-Plated Steel | 6,000 psi @ 72° F | 00000000 | 00000 |
| 1/2" | 1/4 | __ | Zinc-Plated Steel | 6,000 psi @ 72° F | 00000000 | 00000 |
UN/UNF (SAE) Threads | ||||||
| 1/4" | __ | 7/16"-20 | Zinc-Plated Steel | 6,000 psi @ 72° F | 0000000 | 00000 |
| 3/8" | __ | 7/16"-20 | Zinc-Plated Steel | 6,000 psi @ 72° F | 00000000 | 00000 |
| 1/2" | __ | 7/16"-20 | Zinc-Plated Steel | 6,000 psi @ 72° F | 00000000 | 00000 |
Nuts for O-Ring Face Seal Fittings for Steel Tubing
- For Use With: Air, Hydraulic Fluid
- Temperature Range: -30° to 250° F
- Tubing: Use with seamless steel
- Specifications Met: SAE J1453
Use these nuts with O-ring face seal fittings and tube adapters to create a tight seal on steel tubing. Nuts are zinc-plated steel for fair corrosion resistance.
For technical drawings and 3-D models, click on a part number.
O-Ring Face Seal Tube Adapters for Steel Tubing
- For Use With: Air, Hydraulic Fluid
- Temperature Range: -30° to 250° F
- Tubing: Use with seamless steel
- Specifications Met: SAE J1453
Tube adapters sit flush against the flat face of an O-ring face seal fitting so you can slide the tubing and fitting sideways to disconnect in cramped spaces. To install, weld a tube adapter to the tubing with a brazing ring, then mate the tube adapter to an O-ring face seal fitting and screw on the nut. Adapters are zinc-plated steel for fair corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Brazing Rings for O-Ring Face
Seal Fittings for Steel Tubing
- For Use With: Air, Hydraulic Fluid
- Tubing: Use with seamless steel
- Melting Temperature Range: 1,125° to 1,145° F
- Specifications Met: SAE J1453
Use these brazing rings to weld tubing to an O-ring face seal adapter (sold separately).
For technical drawings and 3-D models, click on a part number.
O-Ring Face Seal Fittings for Stainless Steel Tubing
- For Use With: Air, Hydraulic Fluid, Water
- Temperature Range: -30° to 250° F
- Tubing: Use with welded or seamless 316 stainless steel
- Specifications Met: SAE J1453; flared fittings also meet SAE J514
A tube adapter sits flush against the flat face of the fitting so you can slide the tubing and fitting sideways to disconnect in cramped spaces. Fittings are also known as zero-clearance fittings. To install, weld a tube adapter to the tubing with a brazing ring, then mate the tube adapter to the fitting and screw on the nut. As the nut is tightened, the tube adapter compresses the O-ring, creating a strong seal. Fittings are 316 stainless steel for excellent corrosion resistance. Nuts, tube adapters, and brazing rings are sold separately.
NPTF (Dryseal) threads are compatible with NPT threads.
UN/UNF (SAE) threads are also known as O-ring boss threads. Male threads with a gasket provide extra protection against leaks.
For technical drawings and 3-D models, click on a part number.
Male Threads
with Gasket
| For Tube OD | Pipe Size | Thread Size | Material | Gasket Material | Max. Pressure | Each | |
NPTF Threads | |||||||
|---|---|---|---|---|---|---|---|
| 1/4" | 1/4 | __ | 316 Stainless Steel | __ | 4,000 psi @ 72° F | 0000000 | 000000 |
| 3/8" | 3/8 | __ | 316 Stainless Steel | __ | 3,300 psi @ 72° F | 0000000 | 00000 |
| 1/2" | 1/2 | __ | 316 Stainless Steel | __ | 2,400 psi @ 72° F | 0000000 | 00000 |
UN/UNF (SAE) Threads | |||||||
| 1/4" | __ | 7/16"-20 | 316 Stainless Steel | Buna-N Rubber | 4,000 psi @ 72° F | 00000000 | 00000 |
| 3/8" | __ | 9/16"-18 | 316 Stainless Steel | Buna-N Rubber | 3,300 psi @ 72° F | 00000000 | 00000 |
| 1/2" | __ | 3/4"-16 | 316 Stainless Steel | Buna-N Rubber | 2,400 psi @ 72° F | 00000000 | 00000 |
Male Threads
with Gasket
Fittings that swivel until tightened rotate 360° for easy installation.
Female fittings mate with another O-ring face seal fitting without the need for a nut or a tube adapter.
| For Tube OD | Pipe Size | Thread Size | Material | Max. Pressure | Each | |
NPTF Threads | ||||||
|---|---|---|---|---|---|---|
| 1/4" | 1/4 | __ | 316 Stainless Steel | 4,000 psi @ 72° F | 00000000 | 0000000 |
| 3/8" | 3/8 | __ | 316 Stainless Steel | 3,300 psi @ 72° F | 00000000 | 000000 |
| 1/2" | 1/2 | __ | 316 Stainless Steel | 2,400 psi @ 72° F | 00000000 | 000000 |
UN/UNF (SAE) Threads | ||||||
| 1/4" | __ | 7/16"-20 | 316 Stainless Steel | 4,000 psi @ 72° F | 00000000 | 000000 |
| 3/8" | __ | 9/16"-18 | 316 Stainless Steel | 3,300 psi @ 72° F | 00000000 | 000000 |
| 1/2" | __ | 3/4"-16 | 316 Stainless Steel | 2,400 psi @ 72° F | 00000000 | 000000 |
Male Threads
with Gasket
Fittings that swivel until tightened rotate 360° for easy installation.
Female fittings mate with another O-ring face seal fitting without the need for a nut or a tube adapter.
| For Tube OD | Pipe Size | Thread Size | Material | Max. Pressure | Each | |
NPTF Threads | ||||||
|---|---|---|---|---|---|---|
| 1/4" | 1/4 | __ | 316 Stainless Steel | 4,000 psi @ 72° F | 00000000 | 0000000 |
| 3/8" | 1/4 | __ | 316 Stainless Steel | 3,300 psi @ 72° F | 00000000 | 000000 |
| 1/2" | 1/4 | __ | 316 Stainless Steel | 2,400 psi @ 72° F | 00000000 | 000000 |
UN/UNF (SAE) Threads | ||||||
| 1/4" | __ | 7/16"-20 | 316 Stainless Steel | 4,000 psi @ 72° F | 00000000 | 000000 |
| 3/8" | __ | 7/16"-20 | 316 Stainless Steel | 3,300 psi @ 72° F | 00000000 | 000000 |
| 1/2" | __ | 7/16"-20 | 316 Stainless Steel | 2,400 psi @ 72° F | 00000000 | 000000 |
O-Ring Face Seal Tube Adapters
for Stainless Steel Tubing
- For Use With: Air, Hydraulic Fluid, Water
- Temperature Range: -30° to 250° F
- Tubing: Use with seamless or welded 316 stainless steel
- Specifications Met: SAE J1453
Tube adapters sit flush against the flat face of an O-ring face seal fitting so you can slide the tubing and fitting sideways to disconnect in cramped spaces. To install, weld a tube adapter to the tubing with a brazing ring, then mate the tube adapter to an O-ring face seal fitting and screw on the nut. Tube adapters are 316 stainless steel for excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Nuts for O-Ring Face Seal
Fittings for Stainless Steel Tubing
- For Use With: Air, Hydraulic Fluid, Water
- Temperature Range: -30° to 250° F
- Tubing: Use with seamless or welded 316 stainless steel
Use these nuts with O-ring face seal fittings and tube adapters to create a tight seal on stainless steel tubing. They are 316 stainless steel for excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
Backflow-Prevention Inline Hydraulic Valves
Also known as check valves, these open to allow flow in one direction and close when flow stops or reverses.
Valves with a poppet have internal components that can handle any flow rates. The higher the flow rate of the hydraulic fluid coming into the valve, the lower the pressure the fluid is as it leaves the valve.
UN/UNF (SAE) thread connections have straight threads and are also known as O-ring Boss fittings.
UN/UNF (ORFS) threads are also known as O-ring face seal threads.
For technical drawings and 3-D models, click on a part number.
— UN/UNF
(ORFS)
Inlet Connection | Outlet Connection | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Dash Size | Thread Size | Dash Size | Max. Flow Rate | Flow Coefficient (Cv) | Max. Pressure, psi | Min. Opening Pressure, psi | Seal Material | Port-to-Port Lg. | Hex Wd. | Mounting Orientation | Temp. Range, °F | Each | |
Steel Body | ||||||||||||||
| 7/16"-20 | 04 | 9/16"-18 | 04 | Not Rated | Not Rated | 5,000 | 5 | Buna-N Rubber | 1 1/8" | 5/8" | Any Position | -40° to 250° | 0000000 | 000000 |
| 9/16"-18 | 06 | 11/16"-16 | 06 | Not Rated | Not Rated | 5,000 | 5 | Buna-N Rubber | 1 1/8" | 3/4" | Any Position | -40° to 250° | 0000000 | 00000 |
| 3/4"-16 | 08 | 13/16"-16 | 08 | Not Rated | Not Rated | 5,000 | 5 | Buna-N Rubber | 1 3/8" | 7/8" | Any Position | -40° to 250° | 0000000 | 000000 |
| 7/8"-14 | 10 | 1"-14 | 10 | Not Rated | Not Rated | 5,000 | 5 | Buna-N Rubber | 1 5/8" | 1 1/8" | Any Position | -40° to 250° | 0000000 | 000000 |
| 1 1/16"-12 | 12 | 1 3/16"-12 | 12 | Not Rated | Not Rated | 5,000 | 5 | Buna-N Rubber | 1 7/8" | 1 1/4" | Any Position | -40° to 250° | 0000000 | 000000 |
| 1 5/16"-12 | 16 | 1 7/16"-12 | 16 | Not Rated | Not Rated | 5,000 | 5 | Buna-N Rubber | 2" | 1 1/2" | Any Position | -40° to 250° | 0000000 | 000000 |
(ORFS) —
UN/UNF (SAE)
Inlet Connection | Outlet Connection | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Dash Size | Thread Size | Dash Size | Max. Flow Rate | Flow Coefficient (Cv) | Max. Pressure, psi | Min. Opening Pressure, psi | Seal Material | Port-to-Port Lg. | Hex Wd. | Mounting Orientation | Temp. Range, °F | Each | |
Steel Body | ||||||||||||||
| 9/16"-18 | 04 | 7/16"-20 | 04 | Not Rated | Not Rated | 5,000 | 5 | Buna-N Rubber | 1 1/8" | 5/8" | Any Position | -40° to 250° | 0000000 | 000000 |
| 11/16"-16 | 06 | 9/16"-18 | 06 | Not Rated | Not Rated | 5,000 | 5 | Buna-N Rubber | 1 1/8" | 3/4" | Any Position | -40° to 250° | 0000000 | 00000 |
| 13/16"-16 | 08 | 3/4"-16 | 08 | Not Rated | Not Rated | 5,000 | 5 | Buna-N Rubber | 1 3/8" | 7/8" | Any Position | -40° to 250° | 0000000 | 000000 |
| 1"-14 | 10 | 7/8"-14 | 10 | Not Rated | Not Rated | 5,000 | 5 | Buna-N Rubber | 1 5/8" | 1 1/8" | Any Position | -40° to 250° | 0000000 | 000000 |
| 1 3/16"-12 | 12 | 1 1/16"-12 | 12 | Not Rated | Not Rated | 5,000 | 5 | Buna-N Rubber | 1 7/8" | 1 1/4" | Any Position | -40° to 250° | 0000000 | 000000 |
| 1 7/16"-12 | 16 | 1 5/16"-12 | 16 | Not Rated | Not Rated | 5,000 | 5 | Buna-N Rubber | 2" | 1 1/2" | Any Position | -40° to 250° | 0000000 | 000000 |
V-Belts
