9/16"-18 Swivels | McMaster-Carr

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	Shape Shape

	90° Elbow
	Straight
	Tee

	Thread Type Thread Type

UN/UNF (SAE Straight)

UNJ/UNJF (JIC)

	System of Measurement System of Measurement

Inch

	Thread Size Thread Size	Show

9/16"-18

	Thread Size Thread Size	Hide

	Connection Style Connection Style

	Flared Connection Type Flared Connection Type


Internal	Standard

	Type Type


Adapter	Connector

	Gender Gender

Female

Male

	Material Material

Steel

Stainless Steel

	For Tube OD For Tube OD

3/8"

1/2"

	Dash Size Dash Size

	For Use With For Use With

	Connection Type Connection Type


Hose	Pipe

Tube

	Pipe Size Pipe Size

1/4

3/8

1/2

	Flared Angle Flared Angle

30°

37°

	Maximum Pressure Maximum Pressure

	Swivel Type Swivel Type

Swivels Until Tightened

Continuous

	For Hose ID For Hose ID

3/8"

1/2"

	Specifications Met Specifications Met

	Minimum Temperature Minimum Temperature

-250° F or less

-249° to -50° F

-49° to 0° F

	For Tube Material For Tube Material

Stainless Steel

Steel

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

RoHS Compliant

RoHS Compliant with
Exemptions

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

REACH Compliant

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47 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.

About Hose

Metal Push-On Barbed Hose Fittings for Air and Water

Fittings have sharper barbs than standard barbed hose fittings to grip rubber push-on hose with no clamps or ferrules required. The more you pull on the fittings, the tighter the hose will grip. 316 stainless steel fittings have excellent corrosion resistance, so they’re the best choice for high-humidity environments.

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

Fittings with a flared end meet JIC or SAE standards for dimensions. Fittings with a 37° flared end are also known as JIC (Joint Industrial Council) fittings.The optional installation tool (sold separately) allows you to connect large quantities of barbed fittings to push-on hose. Use the built-in cutter to squarely cut the hose without fraying. Next, lubricate either the push-on hose, fitting or both. Then, clamp the hose into the tool’s vise and apply light pressure on the handle to drive into the fitting.

Note: To ensure proper connection, the barbed end has to be pushed in all the way, with the hose end concealed by the ring.

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

Straight Adapters (Swivels Until Tightened), Hose × UN/UNF (Tube End) Female 37° Flared Tube

Maximum Pressure: 300 psi @ 72° F
Temperature Range: -20° to 150° F
Specifications Met: SAE J514

Adapters
			Ring Stop					Replacement Ring Stops
For Hose ID	For Tube OD	Thread Size	Material	Color	Pkg. Qty.		Pkg.	Pkg. Qty.		Pkg.
316 Stainless Steel
3/8"	3/8"	9/16"-18	Plastic	Blue	1	00000000	000000	25	000000000	00000

Installation Tool

				Mounting Hole
For Hose ID Range	Lg.	Ht.	Dp.	Dia.	No. of	Mounting Fasteners Included		Each
1/4" to 3/4"	13 1/2"	7"	2 3/8"	7/16"	4	No	00000000	0000000

Threaded Hose Fittings for Hydraulic Fluid

Fittings are threaded on both ends so you can connect them directly to a threaded hose or to pumps, cylinders, and other equipment in your hydraulic system.

Zinc-plated steel fittings are stronger and more durable than stainless steel fittings. They have fair corrosion resistance. Fittings that swivel until tightened rotate for easy installation.

Fittings with a 37° flared end are also known as JIC (Joint Industrial Council) fittings.

BSPP threads have a gasket or a 60° internal flare to protect against leaks.

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

Straight Adapters (Swivels Until Tightened), BSPP Male Hose × UN/UNF (Tube End) Female 37° Flared Tube

Maximum Pressure: See table
Temperature Range: -20° to 230° F
Specifications Met: SAE J514

Male Hose Connection
Pipe Size	Dash Size	For Tube OD	Thread Size	Max. Pressure		Each
Zinc-Plated Steel
1/4	04	3/8"	9/16"-18	6,000 psi @ 72° F	0000000	00000
3/8	06	3/8"	9/16"-18	5,500 psi @ 72° F	0000000	0000
1/2	08	3/8"	9/16"-18	4,500 psi @ 72° F	0000000	00000

Continuous-Swivel Threaded Hose Fittings for Hydraulic Fluid

Also known as live swivels, these fittings have ball bearings, so they can swivel continuously 360° before and after installation. This not only makes installation easier, but also eliminates the twisting and kinking that can cause premature hose failure. Fittings are threaded on both ends so you can connect them directly to a threaded hose end or to pumps, cylinders, and other equipment in your hydraulic system. They are zinc-plated steel, which has excellent strength and durability. Fittings have fair corrosion resistance.

Fittings with a 37° flared end are also known as JIC (Joint Industrial Council) fittings and meet JIC standards for dimensions.

UN/UNF (SAE Straight) male threads have a gasket to protect against leaks. They are also known as O-ring boss threads.

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

Straight Adapters, UN/UNF (SAE Straight) Male Hose × UN/UNF (Tube End) Male 37° Flared Tube

Maximum Pressure: 5,000 psi @ 72° F
Temperature Range: -40° to 250° F

Male Hose Connection		Male Tube Connection
Thread Size	Dash Size	For Tube OD	Thread Size		Each
Zinc-Plated Steel
9/16"-18	06	3/8"	9/16"-18	0000000	0000000

Push-On Barbed Hose Fittings for Hydraulic Fluid

These fittings have sharp barbs to grip rubber push-on hose with no clamps or ferrules required. The more you pull on the fittings, the tighter the hose will grip. Use them in low-pressure hydraulic applications up to 350 psi. Also known as hose nipples, they adapt a barbed end to a threaded end, so you can connect to pumps, cylinders, and other equipment in your hydraulic system. Fittings are zinc-plated steel, which has excellent strength and durability. Fittings have fair corrosion resistance.

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

Fittings with a 37° flared end are also known as JIC (Joint Industrial Council) fittings.

Note: To ensure proper connection, the barbed end has to be pushed in all the way, with the hose end concealed by the ring.

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

Straight Adapters (Swivels Until Tightened), Hose × UN/UNF (Tube End) Female 37° Flared Tube

Maximum Pressure: See table
Maximum Vacuum: 28 in. of Hg @ 72° F
Temperature Range: -40° to 155° F
For Hose Manufacturer Series: Parker 801
Specifications Met: SAE J514

Fittings
				Ring Stop						10-ft. Hose
For Hose ID	For Tube OD	Thread Size	Dash Size	Material	Color	Max. Pressure	Manufacturer Series		Each		Each
Zinc-Plated Steel
3/8"	3/8"	9/16"-18	06 × 06	Plastic	Yellow	350 psi @ 72° F	Parker 82	00000000	00000	0000000	000000
1/2"	3/8"	9/16"-18	08 × 06	Plastic	Yellow	300 psi @ 72° F	Parker 82	00000000	0000	0000000	00000

Screw-On Hose Fittings for Hydraulic Fluid

These two-piece fittings screw directly onto rubber hose without the need for a separate adapter. To install, separate the two pieces of the fitting (the hose-end portion and the nipple portion). Screw the hose-end portion of the fitting onto the hose, then thread the nipple portion of the fitting into the hose-end portion. When assembled, the fitting compresses against the hose, forming a strong seal. Also known as reusable fittings, they can be unscrewed from the hose end and used on a new hose.

Zinc-plated steel fittings offer better strength and durability than 316 stainless steel fittings. They have fair corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.

Fittings with a 37° flared end are also known as JIC (Joint Industrial Council) fittings. They swivel 360° until tightened for easy installation.

Notes: Fittings are only for use with hydraulic hose.

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

Straight Adapters, Screw-On Hose × Female 37° Flared Tube

Maximum Pressure: See table
Temperature Range: -40° to 212° F
For Hose Manufacturer Series:
Parker 42 Series Fittings: Parker 422 SAE J517 100R1AT
Parker 30 Series Fittings: Parker 302 SAE J517 100R2AT
Specifications Met: See table

Fittings										Hose
For Hose											Per Ft.
ID	OD	For Tube OD	Thread Size	Thread Type	Dash Size	Max. Pressure	Specifications Met		Each		1-99	100-Up
Zinc-Plated Steel—Parker 42 Series
3/8"	11/16"	3/8"	9/16"-18	UN/UNF (JIC)	06	2,600 psi @ 72° F	SAE J516	00000000	000000	00000000	00000	00000
Zinc-Plated Steel—Parker 30 Series
3/8"	3/4"	3/8"	9/16"-18	UN/UNF (JIC)	06	4,500 psi @ 72° F	SAE J516	00000000	00000	0000000	0000	0000
316 Stainless Steel—Parker 30 Series
3/8"	3/4"	3/8"	9/16"-18	UN/UNF (JIC)	06	4,500 psi @ 72° F	SAE J514	0000000	00000	0000000	0000	0000

37° Flared Fittings for Stainless Steel Tubing

Tubing: Use with welded or seamless 304 or 316 stainless steel that meets ASTM A213, ASTM A249, or ASTM A269
Specifications Met: ISO 8434, SAE J514, except fittings with BSPP and BSPT threads meet SAE J514 only

Also known as JIC (Joint Industrial Council) fittings, these provide a tight metal-to-metal seal on tubing that is flared to 37°. They are 316 stainless steel for excellent corrosion resistance. Fittings require a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately.

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

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

For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
Temperature Range: -420° to 1,200° F

Fittings that swivel until tightened have a built-in nut that rotates 360° for easy installation.

Fittings with female tube end have an internal flare that mates with the male tube end of another fitting.

NPT Threads
For Tube OD	Pipe Size	Material	Max. Pressure		Each
3/8"	1/4	316 Stainless Steel	5,000 psi @ 72° F	000000000	000000
3/8"	3/8	316 Stainless Steel	5,000 psi @ 72° F	000000000	000000

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

For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
Temperature Range: -420° to 1,200° F

Fittings that swivel until tightened have a built-in nut that rotates 360° for easy installation.

Fittings with female tube end have an internal flare that mates with the male tube end of another fitting.

NPT Threads
For Tube OD	Pipe Size	Material	Max. Pressure		Each
3/8"	1/4	316 Stainless Steel	5,000 psi @ 72° F	000000000	000000
3/8"	3/8	316 Stainless Steel	5,000 psi @ 72° F	000000000	000000

Straight Connectors (Swivels Until Tightened), Female Tube

For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
Temperature Range: -420° to 1,200° F

Fittings that swivel until tightened have a built-in nut that rotates 360° for easy installation.

Fittings with female tube end have an internal flare that mates with the male tube end of another fitting.

For Tube OD	Material	Max. Pressure		Each
3/8"	316 Stainless Steel	5,000 psi @ 72° F	000000000	0000000

90° Elbow Adapters (Swivels Until Tightened), Tube × Female Tube

For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
Temperature Range: -420° to 1,200° F

Fittings that swivel until tightened have a built-in nut that rotates 360° for easy installation.

Fittings with female tube end have an internal flare that mates with the male tube end of another fitting.

For Tube OD	Material	Max. Pressure		Each
3/8"	316 Stainless Steel	4,500 psi @ 72° F	000000000	000000

Inline Tee Adapters (Swivels Until Tightened), Tube × Female Tube

For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
Temperature Range: -420° to 1,200° F

Fittings that swivel until tightened have a built-in nut that rotates 360° for easy installation.

Fittings with female tube end have an internal flare that mates with the male tube end of another fitting.

Inline tees are also known as branch tees.

For Tube OD	Material	Max. Pressure		Each
3/8"	316 Stainless Steel	4,500 psi @ 72° F	000000000	000000

Right-Angle Tee Adapters (Swivels Until Tightened), Tube × Female Tube

For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
Temperature Range: -420° to 1,200° F

Fittings that swivel until tightened have a built-in nut that rotates 360° for easy installation.

Fittings with female tube end have an internal flare that mates with the male tube end of another fitting.

Right-angle tees are also known as run tees.

For Tube OD	Material	Max. Pressure		Each
3/8"	316 Stainless Steel	4,500 psi @ 72° F	000000000	000000

Nuts

For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
Temperature Range: -420° to 1,200° F

For Tube OD	Nut Material		Each
3/8"	316 Stainless Steel	000000000	00000

Sleeves

For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
Temperature Range: -420° to 1,200° F

Use these sleeves with a nut and fitting to provide a tight metal-to-metal seal on stainless steel tubing that is flared to 37°. Sleeves are 316 stainless steel for excellent corrosion resistance. They are also known as ferrules.

Inch × metric sleeve adapters convert the fitting from inch to metric.

For Tube OD
Inch	Metric, mm	Sleeve Material		Each
Inch
3/8"	__	316 Stainless Steel	000000000	00000
Inch × Metric
3/8"	10	316 Stainless Steel	000000000	00000

Cleaned and Bagged 37° Flared Fittings for Stainless Steel Tubing

For Use With:
NPT Threads: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
UN/UNF (SAE Straight) Threads: Air, Isopropyl Alcohol, Water
Temperature Range:
NPT Threads: -420° to 1200° F
UN/UNF (SAE Straight) Threads: -15° to 400° F
Tubing: Use with seamless or welded 304 or 316 stainless steel that meets ASTM A213, ASTM A249, or ASTM A269
Specifications Met: SAE J514, ISO 8434

Individually bagged to prevent contamination, these fittings are suitable for applications that require a high level of cleanliness. Also known as JIC (Joint Industrial Council) fittings, they provide a tight metal-to-metal seal on tubing that is flared to 37°. They are 316 stainless steel for excellent corrosion resistance. Fittings require a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately and are not cleaned and bagged.

UN/UNF (SAE Straight) male threads have a gasket to protect against leaks. They are also known as O-ring boss threads.

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

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

Fittings that swivel until tightened have a built-in nut that rotates 360° for easy installation.

Fittings with female tube end have an internal flare that mates with the male tube end of another fitting.

NPT Threads
For Tube OD	Pipe Size	Material	Max. Pessure		Each
3/8"	1/4	316 Stainless Steel	5,000 psi @ 72° F	000000000	000000
3/8"	3/8	316 Stainless Steel	5,000 psi @ 72° F	000000000	000000

Nuts

For Tube OD	Nut Material		Each
3/8"	316 Stainless Steel	000000000	00000

Sleeves

For Tube OD	Sleeve Material		Each
3/8"	316 Stainless Steel	000000000	00000

Precision AN 37° Flared Fittings for Stainless Steel Tubing

For Use With: Air, Cutting Oil, Fuel Oil, Hydraulic Fluid, Mineral Oil, Water
Temperature Range: -320° to 1200° F
Tubing: Use with seamless 304 or 316 stainless steel
Specifications Met: See Table

The threads on the tube end of these fittings are Class 3A or 3B and adhere to tighter tolerances than other 37° flared fittings. They are made to exact AS (formerly AN) specifications and provide a tight metal-to-metal seal on tubing that is flared to 37°. Fittings require a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately.

316 stainless steel fittings have excellent corrosion resistance.

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

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

Fittings that swivel until tightened have a built-in nut that rotates 360° for easy installation.

Fittings with female tube end have an internal flare that mates with the male tube end of another fitting.

				316 Stainless Steel
For Tube OD	Pipe Size	Max. Pressure	Specifications Met		Each
ANPT Threads
3/8"	1/4	3,000 psi @ 72° F	ASTM A380, SAE AS4841, SAE AS9100D, SAE AS9104/1	00000000	000000

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.

UN/UNF (SAE Straight) 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 (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.

UN/UNF (SAE Straight) Threads
For Tube OD	Thread Size	Material	Max. Pressure		Each
3/8"	9/16"-18	316 Stainless Steel	3,300 psi @ 72° F	00000000	0000000

Tube Adapters

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

Brazing Rings

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

Nuts

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

O-Rings

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

37° Flared Fittings for Steel Tubing

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

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.

To prevent leaks, UN/UNF (SAE Straight) male threads have a gasket. Metric and BSPP male threads have either a gasket or a gasket and washer. UN/UNF (SAE Straight) threads are also known as O-ring boss threads.

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

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

For Use With: Cutting Oil, Fuel Oil, Hydraulic Fluid, Mineral Oil
Temperature Range: -20° to 212° F

Fittings that swivel until tightened have a built-in nut that rotates 360° for easy installation.

BSPP Threads
For Tube OD	Pipe Size	Material	Max. Pressure		Each
3/8"	1/4	Zinc-Plated Steel	5,500 psi @ 72° F	00000000	00000
3/8"	3/8	Zinc-Plated Steel	5,500 psi @ 72° F	00000000	0000

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

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

For Use With: BSPP: Cutting Oil, Fuel Oil, Hydraulic Fluid, Mineral Oil
UN/UNF (SAE Straight): Air, Fuel Oil, Hydraulic Fluid, Mineral Oil
Temperature Range: BSPP: -20° to 212° F
UN/UNF (SAE Straight): -60° to 400° F

Fittings that swivel until tightened have a built-in nut that rotates 360° for easy installation.

Fittings with female tube end have an internal flare that mates with the male tube end of another fitting.

BSPP Threads
For Tube OD	Pipe Size	Thread Size	Material	Gasket Material	Max. Pressure		Each
3/8"	3/8	__	Zinc-Plated Steel	Buna-N Rubber	5,500 psi @ 72° F	00000000	00000
UN/UNF (SAE Straight) Threads
3/8"	__	9/16"-18	Zinc-Plated Steel	Buna-N Rubber	4,000 psi @ 72° F	00000000	0000

Nuts

For Use With: Air, Fuel Oil, Hydraulic Fluid, Mineral Oil
Temperature Range: -60° to 400° F

For Tube OD	Nut Material	Max. Pressure		Each
3/8"	Zinc-Plated Steel	4,000 psi @ 72° F	000000000	00000

Sleeves

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.

Inch × metric sleeve adapters convert the fitting from inch to metric.

For Tube OD
Inch	Metric, mm	Sleeve Material	Max. Pressure		Each
Inch Sleeves
3/8"	__	Zinc-Plated Steel	4,000 psi @ 72° F	000000000	00000
Inch × Metric Sleeve Adapters
3/8"	10	Zinc-Plated Steel	4,000 psi @ 72° F	000000000	0000

30° Flared Fittings for Steel Tubing

For Use With: Air, Cutting Oil, Diesel Fuel, Fuel Oil, Gasoline, Hydraulic Fluid, Mineral Oil, Water
Specifications Met: See table
Tubing: Use with steel

Also known as JIS (Japanese Industrial Standard) fittings, these have a 30° flare on one or both ends. Fittings are zinc-plated steel for fair corrosion resistance.

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

Straight Adapters (Swivels Until Tightened), Female 30° Flared Tube × Female 37° Flared Tube

Temperature Range: -65° to 500° F

Fittings that swivel until tightened have a built-in nut that rotates 360° for easy installation.

Fittings with female tube end have an internal flare that mates with the male tube end of another fitting.

For Tube OD	Material	Max. Pressure	Specifications Met		Each
1/2"	Zinc-Plated Steel	5,000 psi @ 72° F	ISO 228-1, ISO 263, ISO 8434-2, JIS B 0202, JIS B 8363, SAE J514	0000000	000000

O-Ring Face Seal Fittings for Steel Tubing

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.

BSPP and UN/UNF (SAE Straight) male threads have a gasket to prevent leaks. UN/UNF (SAE Straight) threads are also known as O-ring boss threads.

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

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.

UN/UNF (SAE Straight) Threads
For Tube OD	Thread Size	Material	Gasket Material	Max. Pressure		Each
3/8"	9/16"-18	Zinc-Plated Steel	Buna-N Rubber	6,000 psi @ 72° F	00000000	000000

Brazing Rings

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

Nuts

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

Replacement O-Rings

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