O-Ring Face Seal Tube Fittings

	Connection Style Connection Style

O-Ring Face Seal

	Type Type


Adapter	Connector

Nut

	Shape Shape


Straight	90° Elbow

	Thread Type Thread Type

	Pipe Size Pipe Size

1/4

3/8

1/2

	Thread Size Thread Size

	For Tube OD For Tube OD

1/4"

3/8"

1/2"

	Dash Size Dash Size

	For Tube Material For Tube Material

Steel

Stainless Steel

	Material Material

Steel

Stainless Steel

	For Use With For Use With

	Connection Type Connection Type


Tube	Pipe

	Maximum Pressure Maximum Pressure

	Gender Gender

Male

Female

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant with
Exemptions

RoHS Compliant

	For Tube Fabrication For Tube Fabrication

Seamless

Welded

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Maximum Temperature Maximum Temperature

230° F

250° F

1000° F

	Minimum Temperature Minimum Temperature

	Maximum Vacuum Maximum Vacuum

28 in. of Hg @ 72° F

10^-11 torr @
72° F

Not Rated

	Specifications Met Specifications Met

SAE J1453

SAE J514

	Length Length

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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124 Products

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.

BSPP and UN/UNF
(SAE Straight) Male
Threads with Gasket

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.

Straight Adapters, O-Ring Face Seal × Male 37° Flared Tube

For Tube OD	Material	Max. Pressure		Each
1/4"	Zinc-Plated Steel	6,000 psi @ 72° F	0000000	000000
3/8"	Zinc-Plated Steel	6,000 psi @ 72° F	00000000	00000
1/2"	Zinc-Plated Steel	6,000 psi @ 72° F	00000000	00000

Straight Adapters, O-Ring Face Seal × Male Threaded Pipe

BSPP and UN/UNF
(SAE Straight) Male
Threads with Gasket

BSPP Threads
For Tube OD	Pipe Size	Thread Size	Material	Gasket Material	Max. Pressure		Each
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

Straight Adapters (Swivels Until Tightened), Female O-Ring Face Seal × Male Threaded Pipe

BSPP and UN/UNF
(SAE Straight) Male
Threads with Gasket

Fittings that swivel until tightened rotate 360° for easy installation.

NPT, NPTF Threads
For Tube OD	Pipe Size	Thread Size	Material	Gasket Material	Max. Pressure		Each
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

Straight Adapters (Swivels Until Tightened), Female O-Ring Face Seal × Female Threaded Pipe

Fittings that swivel until tightened rotate 360° for easy installation.

NPT, NPTF Threads
For Tube OD	Pipe Size	Thread Size	Material	Max. Pressure		Each
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

Straight Connectors, O-Ring Face Seal

For Tube OD	Material	Max. Pressure		Each
1/4"	Zinc-Plated Steel	6,000 psi @ 72° F	0000000	00000
3/8"	Zinc-Plated Steel	6,000 psi @ 72° F	0000000	0000
1/2"	Zinc-Plated Steel	6,000 psi @ 72° F	0000000	00000

90° Elbow Adapters, O-Ring Face Seal × Male Threaded Pipe

NPTF Threads
For Tube OD	Pipe Size	Material	Max. Pressure		Each
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	0000000	00000
1/2"	1/2	Zinc-Plated Steel	6,000 psi @ 72° F	0000000	00000

90° Elbow Connectors, O-Ring Face Seal

For Tube OD	Material	Max. Pressure		Each
1/4"	Zinc-Plated Steel	6,000 psi @ 72° F	0000000	000000
3/8"	Zinc-Plated Steel	6,000 psi @ 72° F	0000000	00000
1/2"	Zinc-Plated Steel	6,000 psi @ 72° F	0000000	00000

Brazing Rings

	Material Composition
For Tube OD	Silver	Cadmium	Zinc	Copper		Each
1/4"	45%	24%	16%	15%	0000000	00000
3/8"	45%	24%	16%	15%	00000000	0000
1/2"	45%	24%	16%	15%	00000000	0000

Nuts

For Tube OD	Nut Material	Max. Pressure		Each
1/4"	Zinc-Plated Steel	6,000 psi @ 72° F	0000000	00000
3/8"	Zinc-Plated Steel	6,000 psi @ 72° F	0000000	0000
1/2"	Zinc-Plated Steel	6,000 psi @ 72° F	0000000	0000

Replacement O-Rings

For Tube OD	Max. Pressure	Pkg. Qty.		Pkg.
1/4"	6,000 psi @ 72° F	5	0000000	00000
3/8"	6,000 psi @ 72° F	5	0000000	0000
1/2"	6,000 psi @ 72° F	5	0000000	0000

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.

For Tube OD	Nut Material	Max. Pressure		Each
1/4"	Zinc-Plated Steel	6,000 psi @ 72° F	0000000	00000
3/8"	Zinc-Plated Steel	6,000 psi @ 72° F	0000000	0000
1/2"	Zinc-Plated Steel	6,000 psi @ 72° F	0000000	0000

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.

For Tube OD	Material	Max. Pressure		Each
1/4"	Zinc-Plated Steel	6,000 psi @ 72° F	0000000	00000
3/8"	Zinc-Plated Steel	6,000 psi @ 72° F	0000000	0000
1/2"	Zinc-Plated Steel	6,000 psi @ 72° F	0000000	0000

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.

	Material Composition
For Tube OD	Silver	Cadmium	Zinc	Copper		Each
1/4"	45%	24%	16%	15%	0000000	00000
3/8"	45%	24%	16%	15%	00000000	0000
1/2"	45%	24%	16%	15%	00000000	0000

O-Ring Face Seal Fittings for Stainless Steel Tubing

UN/UNF
(SAE Straight) Male
Threads with Gasket

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.

Straight Adapters, Tube × 37° Flared Tube

For Tube OD	Material	Max. Pressure		Each
1/4"	316 Stainless Steel	4,000 psi @ 72° F	00000000	0000000
3/8"	316 Stainless Steel	3,300 psi @ 72° F	00000000	000000
1/2"	316 Stainless Steel	2,400 psi @ 72° F	00000000	000000

Straight Adapters, Tube × Male Threaded Pipe

UN/UNF
(SAE Straight) Male
Threads with Gasket

NPTF Threads
For Tube OD	Pipe Size	Thread Size	Material	Gasket Material	Max. Pressure		Each
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

Straight Adapters (Swivels Until Tightened), Female Tube × Male Threaded Pipe

UN/UNF
(SAE Straight) 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.

NPTF Threads
For Tube OD	Pipe Size	Thread Size	Material	Max. Pressure		Each
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

Straight Adapters (Swivels Until Tightened), Female Tube × Female Threaded Pipe

UN/UNF
(SAE Straight) 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.

NPTF Threads
For Tube OD	Pipe Size	Thread Size	Material	Max. Pressure		Each
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

Straight Connectors, Tube

For Tube OD	Material	Max. Pressure		Each
1/4"	316 Stainless Steel	4,000 psi @ 72° F	0000000	000000
3/8"	316 Stainless Steel	3,300 psi @ 72° F	0000000	00000
1/2"	316 Stainless Steel	2,400 psi @ 72° F	0000000	00000

90° Elbow Adapters, Tube × Male Threaded Pipe

NPTF Threads
For Tube OD	Pipe Size	Material	Max. Pressure		Each
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

90° Elbow Connectors, Tube

For Tube OD	Material	Max. Pressure		Each
1/4"	316 Stainless Steel	4,000 psi @ 72° F	0000000	000000
3/8"	316 Stainless Steel	3,300 psi @ 72° F	0000000	00000
1/2"	316 Stainless Steel	2,400 psi @ 72° F	0000000	00000

Tube Adapters

For Tube OD	Material	Max. Pressure		Each
1/4"	316 Stainless Steel	4,000 psi @ 72° F	0000000	000000
3/8"	316 Stainless Steel	3,300 psi @ 72° F	0000000	00000
1/2"	316 Stainless Steel	2,400 psi @ 72° F	0000000	00000

Brazing Rings

	Material Composition
For Tube OD	Silver	Cadmium	Copper	Zinc	Nickel		Each
1/4"	50%	16%	15%	15%	3%	00000000	00000
3/8"	50%	16%	15%	15%	3%	00000000	0000
1/2"	50%	16%	15%	15%	3%	00000000	0000

Nuts

For Tube OD	Nut Material	Max. Pressure		Each
1/4"	316 Stainless Steel	4,000 psi @ 72° F	0000000	000000
3/8"	316 Stainless Steel	3,300 psi @ 72° F	0000000	00000
1/2"	316 Stainless Steel	2,400 psi @ 72° F	0000000	00000

O-Rings

For Tube OD	O-Ring Material	Pkg. Qty.		Pkg.
1/4"	Buna-N Rubber	5	0000000	000000
3/8"	Buna-N Rubber	5	0000000	00000
1/2"	Buna-N Rubber	5	0000000	00000

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.

Straight Adapters, Tube × Socket-Connect Tube

For Tube OD	Material	Max. Pressure		Each
1/4"	316 Stainless Steel	4,000 psi @ 72° F	0000000	000000
3/8"	316 Stainless Steel	3,300 psi @ 72° F	0000000	00000
1/2"	316 Stainless Steel	2,400 psi @ 72° F	0000000	00000

Brazing Rings

	Material Composition
For Tube OD	Silver	Cadmium	Copper	Zinc	Nickel		Each
1/4"	50%	16%	15%	15%	3%	00000000	00000
3/8"	50%	16%	15%	15%	3%	00000000	0000
1/2"	50%	16%	15%	15%	3%	00000000	0000

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.

For Tube OD	Nut Material	Max. Pressure		Each
1/4"	316 Stainless Steel	4,000 psi @ 72° F	0000000	000000
3/8"	316 Stainless Steel	3,300 psi @ 72° F	0000000	00000
1/2"	316 Stainless Steel	2,400 psi @ 72° F	0000000	00000

Vibration-Resistant Ultra-High-Polish Gasket Fittings for Stainless Steel Tubing

For Use With: Argon, Helium, Nitrogen
Temperature Range: -420° to 1000° F
Tubing: Use with 316/316L stainless steel

Polished to a 7 Ra finish on the inside, these fittings have an ultra-smooth interior surface. Also known as ultra-high-purity fittings, they are packed in a Class 100 clean room to prevent contamination. They are commonly used in semiconductor applications. Fittings use a metal gasket, which generates fewer particles than a rubber gasket and creates a strong seal in high-pressure and high-vacuum applications. Two anti-torque rings further reduce particle generation by preventing the metal gasket from twisting and loosening. Fittings are 316 stainless steel for excellent corrosion resistance.

For technical drawings and 3-D models, click on a part number.

Gasket Fittings, Gasket × Butt-Weld Tube

Shown Assembled

For Tube OD	Wall Thickness	Lg.	Material	Max. Pressure	Max. Vacuum		Each
1/4"	0.035"	1 13/16"	316/316L Stainless Steel	4,000 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	000000
1/4"	0.035"	2 13/16"	316/316L Stainless Steel	4,000 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	00000
3/8"	0.035"	2 5/8"	316/316L Stainless Steel	2,700 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	00000
1/2"	0.049"	2 15/16"	316/316L Stainless Steel	2,800 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	000000

Adapters, Gasket × Butt-Weld Tube

For Tube OD	Wall Thick.	Lg.	Material	Max. Pressure	Max. Vacuum	Compatible With		Each
1/4"	0.035"	1 1/8"	316/316L Stainless Steel	4,000 psi @ 72° F	10 ^-11 torr @ 72° F	Swagelok® VCR	0000000	000000
1/4"	0.035"	1 3/4"	316/316L Stainless Steel	4,000 psi @ 72° F	10 ^-11 torr @ 72° F	Swagelok® VCR	0000000	00000
3/8"	0.035"	5/8"	316/316L Stainless Steel	2,700 psi @ 72° F	10 ^-11 torr @ 72° F	Swagelok® VCR	0000000	00000
3/8"	0.035"	1 5/16"	316/316L Stainless Steel	2,700 psi @ 72° F	10 ^-11 torr @ 72° F	Swagelok® VCR	0000000	00000
1/2"	0.049"	1 1/8"	316/316L Stainless Steel	2,800 psi @ 72° F	10 ^-11 torr @ 72° F	Swagelok® VCR	0000000	00000
1/2"	0.049"	1 13/16"	316/316L Stainless Steel	2,800 psi @ 72° F	10 ^-11 torr @ 72° F	Swagelok® VCR	0000000	00000

Caps

For Tube OD	Material	Max. Pressure	Max. Vacuum		Each
1/4", 3/8"	316/316L Stainless Steel	4,000 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	000000
1/2"	316/316L Stainless Steel	2,800 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	00000

Plugs

For Tube OD	Material	Max. Pressure	Max. Vacuum		Each
1/4", 3/8"	316/316L Stainless Steel	4,000 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	000000
1/2"	316/316L Stainless Steel	2,800 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	00000

Nuts

Male

Female

				Male		Female
For Tube OD	Nut Material	Max. Pressure	Max. Vacuum		Each		Each
1/4"	316/316L Stainless Steel	4,000 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	00000	0000000	00000
3/8"	316/316L Stainless Steel	2,700 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	0000	0000000	0000
1/2"	316/316L Stainless Steel	2,800 psi @ 72° F	10 ^-11 torr @ 72° F	0000000	00000	0000000	00000

Gaskets

For Tube OD	Gasket Material	Max. Vacuum		Each
1/4", 3/8"	316/316L Stainless Steel	10 ^-11 torr @ 72° F	0000000	00000
1/2"	316/316L Stainless Steel	10 ^-11 torr @ 72° F	0000000	0000

Anti-Torque Rings

For Tube OD	Material	Max. Vacuum		Each
1/4"	316/316L Stainless Steel	10 ^-11 torr @ 72° F	0000000	000000
3/8"	316/316L Stainless Steel	10 ^-11 torr @ 72° F	0000000	00000
1/2"	316/316L Stainless Steel	10 ^-11 torr @ 72° F	0000000	00000

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 (SAE) Male Inlet × UN/UNF (ORFS) Male Outlet—Poppet Check Valve

UN/UNF (SAE) — 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

UN/UNF (ORFS) Male Inlet × UN/UNF (SAE) Male Outlet—Poppet Check Valve

UN/UNF (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