NPTF Flanges | McMaster-Carr

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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.

High-Pressure Stainless Steel Threaded SAE Pipe Flanges

Also known as Code 61 SAE hydraulic flanges, these let you create an access point in a high-pressure hydraulic line. To connect, bolt flanges to equipment, or bolt a flange with an O-ring groove surface to a flange with a flat surface of the same size. Flanges are 316 stainless steel for excellent corrosion resistance.

NPTF (Dryseal) threads are compatible with NPT threads.

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

Flanges with Flat Surface on Back

Front

Back

Specifications Met: SAE J518, ISO 6162
For Use With: Hydraulic Fluid

				Flange					Bolt Hole			316/316L Stainless Steel
Pipe Size	SAE Flange Size	Dash Size	Max. Pressure	Ht.	Wd.	Dp.	Mounting Hardware Included	For Bolt Dia.	Dia.	No. of	Ctr.-to-Ctr.		Each
NPTF
1	1	16	2,000 psi @ 72° F	2 53/64"	2"	1 29/64"	No	3/8"	0.312"	4	1.031", 2.062"	0000000	0000000
1 1/2	1 1/2	24	1,000 psi @ 72° F	3 3/4"	2 3/4"	1 45/64"	No	1/2"	0.422"	4	1.406", 2.75"	0000000	000000
2	2	32	1,000 psi @ 72° F	4"	3 1/4"	1 45/64"	No	1/2"	0.422"	4	1.688", 3.062"	0000000	000000

Flanges with O-Ring Groove Surface on Back

Front

Back

Specifications Met: SAE J518, ISO 6162
For Use With: Hydraulic Fluid

				Flange					Bolt Hole			316/316L Stainless Steel
Pipe Size	SAE Flange Size	Dash Size	Max. Pressure	Ht.	Wd.	Dp.	Mounting Hardware Included	For Bolt Dia.	Dia.	No. of	Ctr.-to-Ctr.		Each
NPTF
3/4	3/4	12	2,500 psi @ 72° F	2 5/8"	1 3/4"	1 13/64"	Yes	3/8"	0.406"	4	0.875", 1.875"	0000000	0000000
1	1	16	2,000 psi @ 72° F	2 53/64"	2"	1 29/64"	Yes	3/8"	0.406"	4	1.031", 2.062"	0000000	000000
1 1/2	1 1/2	24	1,000 psi @ 72° F	3 3/4"	2 3/4"	1 45/64"	Yes	1/2"	0.531"	4	1.406", 2.75"	0000000	000000
2	2	32	1,000 psi @ 72° F	4"	3 1/4"	1 45/64"	Yes	1/2"	0.531"	4	1.688", 3.062"	0000000	000000

High-Pressure Stainless Steel Threaded SAE Two-Piece Pipe Flanges

Combine an adapter with a two-piece pipe flange (sold separately) to build a customized flange connection. Also known as Code 61 or Code 62 split flanges, the two halves of the flange clamp around the adapter and bolt to another Code 61 or Code 62 flange. Flanges and adapters are 316 stainless steel which has excellent corrosion resistance.

NPTF (Dryseal) threads are compatible with NPT threads.

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

Female Adapters

For Use With: Hydraulic Fluid
Specifications Met: SAE J518, ISO 6162

					316/316L Stainless Steel
Pipe Size	For SAE Flange Size	Dash Size	Max. Pressure	For Flanged Connection Surface		Each
NPTF
3/4	3/4	12	5,000 psi @ 72° F	O-Ring Groove	0000000	0000000
1	1	16	4,600 psi @ 72° F	O-Ring Groove	0000000	000000
1 1/2	1 1/2	24	3,000 psi @ 72° F	O-Ring Groove	0000000	000000
2	2	32	3,000 psi @ 72° F	O-Ring Groove	0000000	000000

Two-Piece Flanges

For Use With: Hydraulic Fluid
Specifications Met: SAE J518, ISO 6162

			Flange						For Bolt			316/316L Stainless Steel
SAE Flange Size	Dash Size	Max. Pressure	Ht.	Wd.	Dp.	Flanged Connection Surface	Mounting Hardware Included	For Bolt Dia.	Dia.	No. of	Ctr.-to-Ctr.		Each
Inch
3/4	12	5,000 psi @ 72° F	2 9/16"	2 1/16"	7/8"	O-Ring Groove	Yes	3/8"	0.406"	4	7/8", 1 7/8"	0000000	0000000
1	16	4,600 psi @ 72° F	2 3/4"	2 5/16"	15/16"	O-Ring Groove	Yes	3/8"	0.406"	4	1.031", 2.062"	0000000	000000
1 1/2	24	3,000 psi @ 72° F	3 11/16"	3 1/4"	1"	O-Ring Groove	Yes	1/2"	0.531"	4	1.406", 2 3/4"	0000000	000000
2	32	3,000 psi @ 72° F	4"	3 13/16"	1 1/32"	O-Ring Groove	Yes	1/2"	0.531"	4	1.688", 3.062"	0000000	000000
Metric
3/4	12	5,000 psi @ 72° F	65mm	52mm	22mm	O-Ring Groove	Yes	10mm	10mm	4	22mm, 48mm	0000000	000000
1	16	4,600 psi @ 72° F	70mm	59mm	24mm	O-Ring Groove	Yes	10mm	10mm	4	26mm, 52mm	0000000	000000
1 1/2	24	3,000 psi @ 72° F	94mm	83mm	25mm	O-Ring Groove	Yes	12mm	13mm	4	36mm, 70mm	0000000	000000
2	32	3,000 psi @ 72° F	102mm	97mm	26mm	O-Ring Groove	Yes	12mm	13mm	4	43mm, 78mm	0000000	000000

Low-Pressure Iron and Steel Threaded Pipe Fittings

Use these fittings for low-pressure applications in noncorrosive environments.

Adapters for tanks create an inlet or outlet connection on the surface of any tank, pressure vessel, or drum. Adapters with weld end allow for a permanent connection.

NPTF (Dryseal) threads, NPSC (National Pipe Straight Coupling) threads, and NPSL (National Pipe Straight Locknut) threads are compatible with NPT threads.

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

Straight Adapters for Curved Tanks

For Use With: Diesel Fuel, Gasoline, Oil, Water
Pipe Nipples and Pipe: Use Schedule 40 steel

NPTF Female × Weld
Pipe Size	For Hole Dia.	For Tank OD	OD	Lg.	Material		Each
3/4	1 1/8"	20"	2 3/16"	7/16"	Steel	0000000	00000

High-Pressure Steel Threaded SAE Pipe Flanges

NPTF (Dryseal) threads are compatible with NPT threads.

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

Flanges with Flat Surface on Back

Front

Back

For Use With: Hydraulic Fluid
Specifications Met: SAE J518, ISO 6162

				Flange					Bolt Hole
Pipe Size	Dash Size	SAE Flange Size	Max. Pressure	Ht.	Wd.	Dp.	Mounting Hardware Included	For Bolt Dia.	Dia.	No. of	Ctr.-to-Ctr.		Each
NPTF
3/4	12	3/4	3,000 psi @ 72° F	2 5/8"	1 3/4"	1 1/4"	No	3/8"	3/8"	4	0.875", 1.875"	000000	000000
1	16	1	3,000 psi @ 72° F	2 53/64"	2"	1 1/2"	No	3/8"	3/8"	4	1.031", 2.063"	0000000	00000
1 1/2	24	1 1/2	3,000 psi @ 72° F	3 3/4"	2 3/4"	1 3/4"	No	0.438"	1/2"	4	1.406", 2.75"	0000000	00000
2	32	2	3,000 psi @ 72° F	4"	3 1/4"	1 3/4"	No	1/2"	1/2"	4	1.688", 3.063"	0000000	00000

Flanges with O-Ring Groove Surface on Back

Front

Back

For Use With: Hydraulic Fluid
Specifications Met: SAE J518, ISO 6162

				Flange					Bolt Hole
Pipe Size	Dash Size	SAE Flange Size	Max. Pressure	Ht.	Wd.	Dp.	Mounting Hardware Included	For Bolt Dia.	Dia.	No. of	Ctr.-to-Ctr.		Each
NPTF—Inch
3/4	12	3/4	3,000 psi @ 72° F	2 5/8"	1 3/4"	1 1/4"	Yes	3/8"	0.41"	4	0.875", 1.875"	0000000	000000
1	16	1	3,000 psi @ 72° F	2 53/64"	2"	1 1/2"	Yes	3/8"	0.41"	4	1.031", 2.063"	0000000	00000
1 1/2	24	1 1/2	3,000 psi @ 72° F	3 3/4"	2 3/4"	1 3/4"	Yes	0.438"	0.53"	4	1.406", 2.75"	0000000	00000
2	32	2	3,000 psi @ 72° F	4"	3 1/4"	1 3/4"	Yes	1/2"	0.53"	4	1.688", 3.063"	0000000	00000
NPTF—Metric
1	16	1	3,000 psi @ 72° F	72mm	51mm	38mm	Yes	10mm	10.5mm	4	26mm, 52mm	0000000	00000
2	32	2	3,000 psi @ 72° F	102mm	83mm	44mm	Yes	12mm	13.3mm	4	43mm, 78mm	0000000	00000

High-Pressure Steel Threaded SAE Two-Piece Pipe Flanges

Combine an adapter with a two-piece pipe flange (sold separately) to build a customized flange connection. Also known as Code 61 or Code 62 split flanges, the two halves of the flange clamp around the adapter and bolt to another Code 61 or Code 62 flange. The adapters have NPTF (Dryseal) threads, so they’re compatible with NPT threads. Flanges and adapters should be used in noncorrosive environments.

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

Adapters

For Use With: Hydraulic Fluid
Specifications Met: SAE J518, ISO 6162

NPTF
Pipe Size	Dash Size	For SAE Flange Size	Lg.	Max. Pressure		Each
3/4	12	3/4	3 1/8"	6,000 psi @ 72° F	0000000	000000
1	16	1	3"	3,000 psi @ 72° F	0000000	00000
1	16	1	3 5/8"	6,000 psi @ 72° F	0000000	00000
1 1/2	24	1 1/2	3 5/8"	3,000 psi @ 72° F	000000	000000
1 1/2	24	1 1/2	4 1/2"	6,000 psi @ 72° F	0000000	000000
2	32	2	3 5/8"	3,000 psi @ 72° F	0000000	000000
2	32	2	4 5/8"	6,000 psi @ 72° F	0000000	000000

Two-Piece Flanges

For Use With: Hydraulic Fluid
Specifications Met: SAE J518, ISO 6162

			Flange						Bolt Hole
SAE Flange Size	Dash Size	Max. Pressure	Ht.	Wd.	Dp.	Flanged Connection Surface	Mounting Hardware Included	For Bolt Dia.	Dia.	No. of	Ctr.-to-Ctr.		Each
Inch
3/4	12	6,000 psi @ 72° F	2 13/16"	2 3/8"	1 1/8"	O-Ring Groove	Yes	3/8"	0.41"	4	15/16" , 2"	0000000	000000
1	16	3,000 psi @ 72° F	2 3/4"	2 5/16"	15/16"	O-Ring Groove	Yes	3/8"	0.41"	4	1 1/32" , 2 1/16"	0000000	00000
1	16	6,000 psi @ 72° F	3 3/16"	2 3/4"	1 5/16"	O-Ring Groove	Yes	0.438"	0.47"	4	1 3/32" , 2 1/4"	0000000	00000
1 1/2	24	3,000 psi @ 72° F	3 11/16"	3 1/4"	1"	O-Ring Groove	Yes	0.438"	0.47"	4	1 13/32" , 2 3/4"	000000	00000
1 1/2	24	6,000 psi @ 72° F	4 7/16"	3 3/4"	1 11/16"	O-Ring Groove	Yes	5/8"	0.66"	4	1 7/16" , 3 1/8"	0000000	000000
2	32	3,000 psi @ 72° F	4"	3 13/16"	1 1/32"	O-Ring Groove	Yes	1/2"	0.53"	4	1 11/16" , 3 1/16"	0000000	00000
2	32	6,000 psi @ 72° F	5 1/4"	4 1/2"	2 1/16"	O-Ring Groove	Yes	3/4"	0.78"	4	1 3/4" , 3 13/16"	0000000	000000
Metric
3/4	12	6,000 psi @ 72° F	71mm	60mm	29mm	O-Ring Groove	Yes	10mm	11mm	4	24mm , 51mm	0000000	00000
1	16	3,000 psi @ 72° F	70mm	59mm	24mm	O-Ring Groove	Yes	10mm	11mm	4	26mm , 52mm	0000000	00000
1	16	6,000 psi @ 72° F	81mm	70mm	33mm	O-Ring Groove	Yes	12mm	13mm	4	28mm , 57mm	0000000	00000
1 1/2	24	3,000 psi @ 72° F	94mm	83mm	25mm	O-Ring Groove	Yes	12mm	13mm	4	36mm , 70mm	0000000	00000
1 1/2	24	6,000 psi @ 72° F	113mm	95mm	43mm	O-Ring Groove	Yes	16mm	17mm	4	37mm , 80mm	000000	000000
2	32	3,000 psi @ 72° F	102mm	97mm	26mm	O-Ring Groove	Yes	12mm	13mm	4	43mm , 78mm	0000000	00000
2	32	6,000 psi @ 72° F	5 1/4"	4 1/2"	2 1/16"	O-Ring Groove	Yes	20mm	21mm	4	1 3/4" , 3 13/16"	0000000	000000