Metric Flared Fittings | McMaster-Carr

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54 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.

Temperature Range: -65° to 250° F
Tubing: Use with seamless brass and copper that meets ASTM B280

No sleeve is required to assemble these fittings, which makes for a faster, more convenient installation compared to 37° flared fittings. They require a nut (sold separately) for each tube end. Fittings are also known as refrigeration and SAE fittings. They are brass for good corrosion resistance.

Metric and UN/UNF (Straight) threads have a gasket to protect against leaks. Copper tube size is the accepted designation of the copper tubing industry, not the actual tube OD.

Straight Adapters, Tube × Male Threaded Pipe

For Use With: Air, Cutting Oil, Diesel Fuel, Fuel Oil, Mineral Oil, Refrigerant, Water; except adapters for 1/8" and 1" tube OD are not for use with fuel oil
Specifications Met: See table

For Tube									Each
OD	Wall Thick.	Thread Size	Thread Pitch, mm	Material	Gasket Material	Max. Pressure	Specifications Met		1-9	10-49	50-Up
Metric Threads
1/2"	0.032"	M16	1.5	Brass	Fluoroelastomer Rubber	750 psi @ 72° F	SAE J512, SAE J513, UL Listed	000000000	000000	000000	000000
5/8"	0.035"	M27	2	Brass	Fluoroelastomer Rubber	650 psi @ 72° F	SAE J512, SAE J513, UL Listed	000000000	00000	00000	00000
3/4"	0.035"	M27	2	Brass	Fluoroelastomer Rubber	550 psi @ 72° F	SAE J512, SAE J513, UL Listed	000000000	00000	00000	00000

90° Elbow Adapters, Tube × Male Threaded Pipe

For Use With:
Air, Cutting Oil, Diesel Fuel, Fuel Oil, Mineral Oil, Refrigerant, Water
Specifications Met: SAE J512, SAE J513, UL Listed

For Tube								Each
OD	Wall Thick.	Thread Size	Thread Pitch, mm	Material	Gasket Material	Max. Pressure		1-9	10-49	50-Up
Metric Threads
5/8"	0.035"	M27	2	Brass	Fluoroelastomer Rubber	650 psi @ 72° F	000000000	000000	000000	000000

45° Elbow Adapters, Tube × Male Threaded Pipe

For Use With: Air, Cutting Oil, Diesel Fuel, Fuel Oil, Mineral Oil, Refrigerant, Water
Specifications Met: SAE J512, SAE J513, UL Listed

For Tube								Each
OD	Wall Thick.	Thread Size	Thread Pitch, mm	Material	Gasket Material	Max. Pressure		1-9	10-49	50-Up
Metric Threads
1/2"	0.032"	M16	1.5	Brass	Fluoroelastomer Rubber	750 psi @ 72° F	000000000	000000	000000	000000
5/8"	0.035"	M27	2	Brass	Fluoroelastomer Rubber	650 psi @ 72° F	000000000	00000	00000	00000

Nuts

(A) Short Nut

(B) Short Nut

For Use With: Air, Cutting Oil, Diesel Fuel, Fuel Oil, Mineral Oil, Refrigerant, Water; except nuts for 1" tube OD are not for use with fuel oil
Specifications Met: SAE J512, SAE J513, UL Listed; except nuts for 1" tube OD meet SAE J512 and SAE J513 only

	For Tube						Each
	OD	Wall Thick.	Nut Material	Max. Pressure	Lg.		1-19	20-99	100-Up
Short Nuts
A	1/2"	0.032"	Brass	750 psi @ 72° F	1"	000000000	00000	00000	00000
A	5/8"	0.035"	Brass	650 psi @ 72° F	1 1/16"	000000000	0000	0000	0000
B	1/2"	0.032"	Brass	750 psi @ 72° F	27/32"	000000000	0000	0000	0000
B	5/8"	0.035"	Brass	650 psi @ 72° F	31/32"	000000000	0000	0000	0000

Sleeves 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 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 × Metric
1/4"	6	316 Stainless Steel	000000000	000000
5/16"	8	316 Stainless Steel	000000000	00000
3/8"	10	316 Stainless Steel	000000000	00000
1/2"	12	316 Stainless Steel	000000000	00000

37° Flared Fittings for Steel Tubing

BSPP and Metric
Male Threads with
Gasket and Washer

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.

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.

Straight Adapters, Male Tube × Male Threaded Pipe

BSPP and Metric
Male Threads with
Gasket and Washer

Temperature Range: See table

Metric Threads
For Tube OD	Thread Size	Thread Pitch, mm	Material	Gasket Material	Washer Material	Max. Pressure	Temp. Range, °F		Each
1/4"	M10	1	Zinc-Plated Steel	Buna-N Rubber	__	3,600 psi @ 72° F	-30° to 200°	00000000	000000
1/4"	M10	1	Zinc-Plated Steel	Buna-N Rubber	Zinc-Plated Steel	4,500 psi @ 72° F	-20° to 212°	00000000	0000
1/4"	M12	1.5	Zinc-Plated Steel	Buna-N Rubber	__	3,600 psi @ 72° F	-30° to 200°	00000000	00000
1/4"	M12	1.5	Zinc-Plated Steel	Buna-N Rubber	Zinc-Plated Steel	4,500 psi @ 72° F	-20° to 212°	00000000	00000
3/8"	M14	1.5	Zinc-Plated Steel	Buna-N Rubber	__	3,600 psi @ 72° F	-30° to 200°	00000000	00000
3/8"	M14	1.5	Zinc-Plated Steel	Buna-N Rubber	Zinc-Plated Steel	4,500 psi @ 72° F	-20° to 212°	00000000	00000
3/8"	M16	1.5	Zinc-Plated Steel	Buna-N Rubber	__	2,300 psi @ 72° F	-30° to 200°	00000000	00000
1/2"	M16	1.5	Zinc-Plated Steel	Buna-N Rubber	__	2,300 psi @ 72° F	-30° to 200°	00000000	00000
1/2"	M18	1.5	Zinc-Plated Steel	Buna-N Rubber	__	2,300 psi @ 72° F	-30° to 200°	00000000	00000
1/2"	M18	1.5	Zinc-Plated Steel	Buna-N Rubber	Zinc-Plated Steel	4,500 psi @ 72° F	-20° to 212°	00000000	00000
5/8"	M18	1.5	Zinc-Plated Steel	Buna-N Rubber	__	2,300 psi @ 72° F	-30° to 200°	00000000	00000
5/8"	M20	1.5	Zinc-Plated Steel	Buna-N Rubber	__	2,300 psi @ 72° F	-30° to 200°	00000000	00000
5/8"	M22	1.5	Zinc-Plated Steel	Buna-N Rubber	__	2,300 psi @ 72° F	-30° to 200°	00000000	00000
3/4"	M22	1.5	Zinc-Plated Steel	Buna-N Rubber	__	2,300 psi @ 72° F	-30° to 200°	00000000	00000

90° Elbow Adapters, Male Tube × Male Threaded Pipe

Temperature Range: NPT: -65° to 400° F
NPTF and BSPT: -60° to 400° F
Metric and BSPP with O-Rings: -30° to 200°F
BSPP with Washers: -20° to 212° F

Metric Threads
For Tube OD	Thread Size	Thread Pitch, mm	Material	Gasket Material	Max. Pressure		Each
1/4"	M10	1	Zinc-Plated Steel	Buna-N Rubber	3,600 psi @ 72° F	00000000	000000
1/4"	M12	1.5	Zinc-Plated Steel	Buna-N Rubber	3,600 psi @ 72° F	00000000	00000
3/8"	M16	1.5	Zinc-Plated Steel	Buna-N Rubber	2,300 psi @ 72° F	00000000	00000
1/2"	M18	1.5	Zinc-Plated Steel	Buna-N Rubber	2,300 psi @ 72° F	00000000	00000
5/8"	M18	1.5	Zinc-Plated Steel	Buna-N Rubber	2,300 psi @ 72° F	00000000	00000

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 Sleeves
1/4"	__	Zinc-Plated Steel	4,500 psi @ 72° F	000000000	00000
3/8"	__	Zinc-Plated Steel	4,000 psi @ 72° F	000000000	000
1/2"	__	Zinc-Plated Steel	4,000 psi @ 72° F	000000000	0000
5/8"	__	Zinc-Plated Steel	3,000 psi @ 72° F	000000000	0000
3/4"	__	Zinc-Plated Steel	3,000 psi @ 72° F	000000000	0000
Inch × Metric Sleeve Adapters
1/4"	6	Zinc-Plated Steel	4,500 psi @ 72° F	000000000	000
3/8"	10	Zinc-Plated Steel	4,000 psi @ 72° F	000000000	000
1/2"	12	Zinc-Plated Steel	4,000 psi @ 72° F	000000000	0000
5/8"	14	Zinc-Plated Steel	3,000 psi @ 72° F	000000000	0000
5/8"	16	Zinc-Plated Steel	3,000 psi @ 72° F	000000000	0000

Nuts

Temperature Range: -60° to 400° F

For Tube OD	Nut Material	Max. Pressure		Each
1/4"	Zinc-Plated Steel	4,500 psi @ 72° F	000000000	00000
3/8"	Zinc-Plated Steel	4,000 psi @ 72° F	000000000	0000
1/2"	Zinc-Plated Steel	4,000 psi @ 72° F	000000000	0000
5/8"	Zinc-Plated Steel	3,000 psi @ 72° F	000000000	0000
3/4"	Zinc-Plated Steel	3,000 psi @ 72° F	000000000	0000

Sleeves 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

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

For Tube OD
Inch	Metric, mm	Sleeve Material	Max. Pressure		Each
Inch Sleeves
1/4"	__	Zinc-Plated Steel	4,500 psi @ 72° F	000000000	00000
3/8"	__	Zinc-Plated Steel	4,000 psi @ 72° F	000000000	000
1/2"	__	Zinc-Plated Steel	4,000 psi @ 72° F	000000000	0000
5/8"	__	Zinc-Plated Steel	3,000 psi @ 72° F	000000000	0000
3/4"	__	Zinc-Plated Steel	3,000 psi @ 72° F	000000000	0000
Inch × Metric Sleeve Adapters
1/4"	6	Zinc-Plated Steel	4,500 psi @ 72° F	000000000	000
5/16"	8	Zinc-Plated Steel	4,000 psi @ 72° F	000000000	0000
3/8"	10	Zinc-Plated Steel	4,000 psi @ 72° F	000000000	000
1/2"	12	Zinc-Plated Steel	4,000 psi @ 72° F	000000000	0000
5/8"	14	Zinc-Plated Steel	3,000 psi @ 72° F	000000000	0000
5/8"	16	Zinc-Plated Steel	3,000 psi @ 72° F	000000000	0000
7/8"	20	Zinc-Plated Steel	2,500 psi @ 72° F	000000000	00000

Tight-Space 37° Flared Fittings for Steel Tubing

Temperature Range: -20° to 212° F
Tubing: Use with seamless steel
Specifications Met: SAE J514

The external hex bolt on these fittings allows for easy installation in cramped spaces. Fittings are also known as banjo-style fittings and JIC (Joint Industrial Council) fittings. They provide a tight metal-to-metal seal on tubing that is flared to 37°. Fittings are zinc-plated steel, which has fair corrosion resistance.

90° Elbow Adapters with External Hex, Tube × Male Threaded Pipe

Metric Threads
For Tube OD	Thread Size	Thread Pitch, mm	Material	Washer Material	Max. Pressure		Each
1/4"	M10	1	Zinc-Plated Steel	Copper	3,500 psi @ 72° F	00000000	000000
1/4"	M12	1.5	Zinc-Plated Steel	Copper	3,500 psi @ 72° F	00000000	00000
3/8"	M14	1.5	Zinc-Plated Steel	Copper	3,000 psi @ 72° F	00000000	00000
1/2"	M18	1.5	Zinc-Plated Steel	Copper	3,000 psi @ 72° F	00000000	00000

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How to Identify and Measure Fittings

45° Flared Fittings for Copper and Brass Tubing

Sleeves for 37° Flared Fittings for Stainless Steel Tubing

37° Flared Fittings for Steel Tubing

Sleeves for 37° Flared Fittings for Steel Tubing

Tight-Space 37° Flared Fittings for Steel Tubing