1 3/16"-12 Couplings | McMaster-Carr

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16 Products

About Pipe and Fittings

Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.

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 zinc-plated steel, which have better corrosion resistance than plain steel fittings.

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 either a gasket or a gasket and washer to prevent leaks.

Straight Adapters, Female × Male

UN/UNF
(SAE Straight) Male
Threads with Gasket

For Use With: See table
Specifications Met: See table

NPTF Female × UN/UNF (SAE Straight) Male
Pipe Size (A)	Dash Size (A)	Thread Size (B)	Dash Size (B)	Max. Pressure	Material	For Use With	Specifications Met		Each
1/2	08	1 3/16"-12	14	5,000 psi @ 72° F	Zinc Plated Steel	Air, Hydraulic Fluid, Water	ASTM A108	50925K462	000000
3/4	12	1 3/16"-12	14	4,000 psi @ 72° F	Zinc Plated Steel	Air, Hydraulic Fluid, Water	ASTM A108	50925K463	00000

Plugs with Hex Drive

UN/UNF
(SAE Straight) Male
Threads with Gasket

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

UN/UNF (SAE Straight) Male
Thread Size	Dash Size	Drive Size	Max. Pressure	Material	Specifications Met		Each
1 3/16"-12	14	9/16"	5,500 psi @ 72° F	Zinc Plated Steel	ASTM A108	50925K443	00000

Plugs with External Hex Drive

UN/UNF
(SAE Straight) Male
Threads with Gasket

For Use With: See table
Specifications Met: See table

UN/UNF (SAE Straight) Male
Thread Size	Dash Size	Plug Construction	Max. Pressure	Material	For Use With	Specifications Met		Each
1 3/16"-12	14	Hollow	5,500 psi @ 72° F	Zinc Plated Steel	Air, Hydraulic Fluid, Water	ASTM A108	50925K424	000000

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 withstand high pressure, so they’re often used in hydraulic applications. Made from 316 stainless steel, they resist corrosion from water and chemicals. A complete fitting requires a nut and a sleeve (ferrule) for each tube end. Nuts and sleeves are sold separately.

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

Straight Adapters, Tube × Male Threaded Pipe

For Use With: See table
Temperature Range: See table

NPT Threads
For Tube OD	Pipe Size	Thread Size	For Use With	Material	Gasket Material	Max. Pressure	Temp. Range, °F		Each
7/8"	3/4	__	Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water	316 Stainless Steel	__	4,000 psi @ 72° F	-420° to 1200°	50715K119	0000000
UN/UNF (SAE Straight) Threads
3/4"	__	1 3/16"-12	Air, Hydraulic Fluid, Isopropyl Alcohol, Water	316 Stainless Steel	Buna-N Rubber	5,000 psi @ 72° F	-30° to 250°	50715K361	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
3/4"	316 Stainless Steel	50715K632	000000
7/8"	316 Stainless Steel	50715K138	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.

For Tube OD
Inch	Sleeve Material		Each
Inch
3/4"	316 Stainless Steel	50715K624	000000
7/8"	316 Stainless Steel	50715K111	00000

Nuts for 37° Flared Fittings for Stainless Steel Tubing

For Use With: Air, Hydraulic Fluid, Isopropyl Alcohol, Natural Gas, Phosphoric Acid, Water
Temperature Range: -420° to 1,200° F
Tubing: Use with seamless or welded 304 or 316 stainless steel that meets ASTM A213, ASTM A249, or ASTM A269
Specifications Met: ISO 8434, SAE J514

Use these nuts with a sleeve and fitting to provide a tight metal-to-metal seal on stainless steel tubing that is flared to 37°. Nuts are 316 stainless steel for excellent corrosion resistance.

For Tube OD	Nut Material		Each
3/4"	316 Stainless Steel	50715K632	000000
7/8"	316 Stainless Steel	50715K138	00000

37° Flared Fittings for Steel Tubing

For Use With: Air, Cutting Oil, Fuel Oil, Hydraulic Fluid, Mineral Oil
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.

Straight Adapters, Male Tube × Male Threaded Pipe

Temperature Range: See table

NPTF Threads
For Tube OD	Pipe Size	Material	Max. Pressure	Temp. Range, °F		Each
7/8"	3/4	Zinc-Plated Steel	2,500 psi @ 72° F	-60° to 400°	50695K49	000000

Straight Connectors, Male Tube

Temperature Range: -60° to 400° F

For Tube OD	Material	Max. Pressure		Each
7/8"	Zinc-Plated Steel	2,500 psi @ 72° F	50695K712	000000

Sleeves

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 × Metric Sleeve Adapters
7/8"	20	Zinc-Plated Steel	2,500 psi @ 72° F	50695K119	000000

Nuts

Temperature Range: -60° to 400° F

For Tube OD	Nut Material	Max. Pressure		Each
7/8"	Zinc-Plated Steel	2,500 psi @ 72° F	50695K34	000000

Nuts for 37° Flared Fittings for Steel Tubing

For Use With: Air, Fuel Oil, Hydraulic Fluid, Mineral Oil
Temp. Range: -60° to 400° F
Tubing: Use with seamless steel
Specifications Met: SAE J514

Use these nuts with a sleeve and fitting to provide a tight metal-to-metal seal on steel tubing that is flared to 37°. They are zinc-plated steel for fair corrosion resistance.

For Tube OD	Nut Material	Max. Pressure		Each
7/8"	Zinc-Plated Steel	2,500 psi @ 72° F	50695K34	000000

Crimp-On Hose Fittings for Hydraulic Fluid

Crimp these fittings onto hydraulic hose for a permanent, leak-tight connection. Since they crimp on, they handle higher pressure than screw-on fittings. To install, use Parker crimping tools and dies (not included).

Fittings with a female end swivel 360° until tightened without you needing to move or twist the entire hose, making them easy to install.

Fittings with an O-ring face seal end are also known as Seal-Lok fittings.

Note: Fittings are only for use with hydraulic hose.

Straight Adapters, Crimp-On Hose × O-Ring Face Seal Tube

Maximum Pressure: See table
Temperature Range: -40° to 210° F
For Hose Manufacturer Series:
Parker 43 Series Fittings: 302 SAE J517 100R2AT, 422 SAE J517 100R1AT, 487 ISO17582-AC, 777 ISO17582-CC
Parker 56 Series Fittings: 510D J517 SAE 100R7, 518D J517 SAE 100R7

For Hose
ID	OD	For Tube OD	Thread Size	Thread Type	Dash Size	Max. Pressure		Each
Zinc-Plated Steel—Parker 43 Series
3/4"	1 1/8"	3/4"	1 3/16"-12	UN/UNF (SAE Straight)	12	4,000 psi @ 72° F	7175N48	000000
Zinc-Plated Steel—Parker 56 Series
3/4"	1 1/16"	3/4"	1 3/16"-12	UN/UNF (SAE Straight)	12	1,250 psi @ 72° F	7175N96	00000