Brass Flanges | McMaster-Carr

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	Type Type


Flange	Adapter

Cap	Locknut

	Material Material	Show

Brass

	Material Material	Hide

Glass-Filled PVC Plastic

	Pipe Size Pipe Size

	Thread Type Thread Type

NPSL

NPT

	Connection Style Connection Style

Flanged

Threaded

Socket Connect

	For Use With For Use With

	Copper Tube Size Copper Tube Size

1/2
3/4
1
1 1/4
1 1/2
2
2 1/2
3
4

	Number of Bolt Holes Number of Bolt Holes

	Shape Shape

	Straight
	Cap/Plug
	Round

	Pressure Class Pressure Class

125

150

	Flanged Connection Surface Flanged Connection Surface

	Flat

	System of Measurement System of Measurement

Inch

	Flange OD Flange OD

	For Pipe Material For Pipe Material

Brass

	For Bolt Diameter For Bolt Diameter

1/2"

5/8"

	Bolt Circle Diameter Bolt Circle Diameter

	Connection Type Connection Type


Pipe	Tube

	For Tube OD For Tube OD

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

DFARS Specialty Metals
COTS-Exempt

	Specifications Met Specifications Met

	Maximum Pressure Maximum Pressure

	Gender Gender

Female

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

RoHS Compliant

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

REACH Compliant

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37 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.

Front

Flat Surface on Back

For Use With: Air, Drinking Water, Natural Gas, Oil, Steam, Water
Pressure Class: 150
Specifications Met:
NPT: ASME B1.20.1, ASME B16.24, ASTM B584, NSF/ANSI 61
BSPT: ASTM B584, BS21
Pipe Nipples and Pipe: Use Schedule 40 brass
Fittings:
NPT: Use Class 125 brass
BSPT: Use Class 125 bronze

Also known as Pressure Class 150 flanges, these are designed for low-pressure applications. Bolt two same-size flanges together with a gasket (sold separately) to create an access point within a line. Flanges have good corrosion resistance. To adhere to safety standards for drinking water systems, use flanges that meet NSF/ANSI 61.

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

			Bolt Hole
Pipe Size	Flange OD	For Bolt Dia.	Dia.	No. of	Bolt Circle Dia.	Max. Pressure	Material		Each
NPT
1/2	3 1/2"	1/2"	5/8"	4	2 3/8"	225 psi @ 72° F	Brass	00000000	0000000
3/4	3 7/8"	1/2"	5/8"	4	2 3/4"	225 psi @ 72° F	Brass	00000000	000000
1	4 1/4"	1/2"	5/8"	4	3 1/8"	225 psi @ 72° F	Brass	00000000	000000
1 1/4	4 5/8"	1/2"	5/8"	4	3 1/2"	225 psi @ 72° F	Brass	00000000	000000
1 1/2	5"	1/2"	5/8"	4	3 7/8"	225 psi @ 72° F	Brass	00000000	000000
2	6"	5/8"	3/4"	4	4 3/4"	225 psi @ 72° F	Brass	00000000	000000
2 1/2	7"	5/8"	3/4"	4	5 1/2"	225 psi @ 72° F	Brass	00000000	000000
3	7 1/2"	5/8"	3/4"	4	6"	225 psi @ 72° F	Brass	00000000	000000
4	9"	5/8"	3/4"	8	7 1/2"	225 psi @ 72° F	Brass	00000000	00000000

Low-Pressure Brass and Bronze Threaded Pipe Fittings

Use these fittings in low-pressure flow applications. They have good corrosion resistance. Fittings rated for use with drinking water meet NSF/ANSI 61 safety standards.

Locknuts thread onto the male end of a fitting to provide extra holding power so the fitting won’t loosen from vibration.

NPSL (National Pipe Straight Locknut) threads are compatible with NPT threads.

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

Locknuts

For Use With: See table
Pressure Class: See table
Specifications Met: See table
Pipe Nipples and Pipe: See table
Flanges: See table

				For Pipe		For Flange
Pipe Size	Max. Pressure	Pressure Class	Material	Schedule	Material	Class	Material	For Use With	Specifications Met		Each
NPSL Female
1/8	200 psi @ 72° F	125	Brass	40	Brass	150	Brass	Air, Drinking Water, Natural Gas, Oil	ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61	00000000	00000
1/4	200 psi @ 72° F	125	Brass	40	Brass	150	Brass	Air, Drinking Water, Natural Gas, Oil	ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61	00000000	0000
3/8	200 psi @ 72° F	125	Brass	40	Brass	150	Brass	Air, Drinking Water, Natural Gas, Oil	ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61	00000000	0000
1/2	200 psi @ 72° F	125	Brass	40	Brass	150	Brass	Air, Drinking Water, Natural Gas, Oil	ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61	00000000	0000
3/4	200 psi @ 72° F	125	Brass	40	Brass	150	Brass	Air, Drinking Water, Natural Gas, Oil	ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61	00000000	0000
1	200 psi @ 72° F	125	Brass	40	Brass	150	Brass	Air, Drinking Water, Natural Gas, Oil	ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61	00000000	0000
1 1/4	200 psi @ 72° F	125	Brass	40	Brass	150	Brass	Air, Drinking Water, Natural Gas, Oil	ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61	00000000	00000
1 1/2	200 psi @ 72° F	125	Brass	40	Brass	150	Brass	Air, Drinking Water, Natural Gas, Oil	ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61	00000000	00000
2	200 psi @ 72° F	125	Brass	40	Brass	150	Brass	Air, Drinking Water, Natural Gas, Oil	ASME B1.20.1, ASME B16.15, ASTM A584, NSF/ANSI 61	00000000	00000
2 1/2	200 psi @ 72° F	125	Brass	40	Brass	150	Brass	Air, Natural Gas, Oil	ASME B16.15	00000000	00000
3	200 psi @ 72° F	125	Brass	40	Brass	150	Brass	Air, Natural Gas, Oil	ASME B16.15	00000000	00000
4	200 psi @ 72° F	125	Brass	40	Brass	150	Brass	Air, Natural Gas, Oil	ASME B16.15	00000000	000000

Brass and Bronze Unthreaded Pipe Flanges

Bolt these flanges to equipment or to another same-size, flat-surface flange with a gasket (sold separately). They have good corrosion resistance.

Cap flanges are also known as blind flanges.

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

Caps

Front

Flat Surface on Back

For Use With: Air, Argon, Natural Gas, Nitrogen Gas, Oil, Oxygen, Water
Pressure Class : 150
Specifications Met: ASME B16.24
Pipe Nipples and Pipe: Use Schedule 40 brass

			Bolt Hole
Pipe Size	Flange OD	For Bolt Dia.	Dia.	No. of	Bolt Circle Dia.	Max. Pressure	Material		Each
2	6"	1/2"	3/4"	4	4 3/4"	225 psi @ 72° F	Brass	00000000	0000000
2 1/2	7"	1/2"	3/4"	4	5 1/2"	225 psi @ 72° F	Brass	00000000	000000
3	7 1/2"	1/2"	3/4"	4	6"	225 psi @ 72° F	Brass	00000000	000000
4	9"	1/2"	3/4"	8	7 1/2"	225 psi @ 72° F	Brass	00000000	000000

Solder-Connect Fittings for Copper Tubing

Temperature Range: 32° to 200° F

Solder these fittings to copper tubing or the tube end of another fitting for a permanent, leak-tight connection. They are also known as sweat fittings. Fittings have good corrosion resistance. To adhere to safety standards for drinking water systems, use fittings that meet NSF/ANSI 61 or EN 1057.

Copper tube size is the accepted designation of the copper tubing industry, not the actual tube OD.

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

Flanges, Female Socket-Connect Tube

For Use With: Drinking Water
Tubing: Use with K, M, L copper
Specifications Met: See table

Fittings with flange end bolt to equipment or another same-size flange to create an access point within a line.

Copper Tube Size	For Tube OD	Flange OD	Bolt Circle Dia.	Number of Bolt Holes	Bolt Hole Diameter	For Bolt Diameter	Bolts Included	Material	Max. Pressure	Specifications Met		Each
1/2	5/8"	3 1/2"	2 3/8"	4	5/8"	1/2"	No	Brass	400 psi @ 72° F	ASME B16.22, MSS-SP104, NSF/ANSI 61	00000000	000000
3/4	7/8"	3 7/8"	2 3/4"	4	5/8"	1/2"	No	Brass	400 psi @ 72° F	ASME B16.22, MSS-SP104, NSF/ANSI 61	00000000	00000
1	1 1/8"	4 1/4"	3 1/8"	4	5/8"	1/2"	No	Brass	400 psi @ 72° F	ASME B16.18, NSF/ANSI 61	00000000	000000
1 1/4	1 3/8"	4 5/8"	3 1/2"	4	5/8"	1/2"	No	Brass	400 psi @ 72° F	ASME B16.18, NSF/ANSI 61	00000000	000000
1 1/2	1 5/8"	5"	3 7/8"	4	5/8"	1/2"	No	Brass	400 psi @ 72° F	ASME B16.18, NSF/ANSI 61	00000000	000000
2	2 1/8"	6"	4 3/4"	4	3/4"	5/8"	No	Brass	300 psi @ 72° F	ASME B16.18, NSF/ANSI 61	00000000	000000
2 1/2	2 5/8"	7"	5 1/2"	4	3/4"	5/8"	No	Brass	300 psi @ 72° F	ASME B16.22, MSS-SP104, NSF/ANSI 61	00000000	000000
3	3 1/8"	7 1/2"	6"	4	3/4"	5/8"	No	Brass	300 psi @ 72° F	ASME B16.22, MSS-SP104, NSF/ANSI 61	00000000	000000
4	4 1/8"	9"	7 1/2"	4	3/4"	5/8"	No	Brass	200 psi @ 72° F	ASME B16.22, MSS-SP104, NSF/ANSI 61	00000000	000000

Laboratory Flanges and Turrets

Provide a connection for stop cocks, needle valves, and nozzles by attaching these flanges and turrets to your supply pipe.

				Inlet			Outlet
	No. of Outlets	Dia.	Ht.	Pipe Size	Thread Type	Gender	Pipe Size	Thread Type	Gender		Each
For Air, Gas, and Water
Chrome-Plated Brass
A	1	2"	1 1/8"	3/8	NPT	Female	3/8	NPT	Female	0000000	000000

Covers for Steel Floor Outlet Boxes

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

For Max. No. of Devices	For Device Type	For No. of Outlets	Dia.	Material	Specifications Met		Each
1	NEMA Outlet	2	3 7/8"	Brass	UL Listed, CSA Certified	000000	0000000

Carpet Flanges for Steel Floor Outlet Boxes

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

Dia.	Material	Specifications Met		Each
5 1/4"	Brass	UL Listed, CSA Certified	000000	0000000

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How to Identify and Measure Fittings

Low-Pressure Brass and Bronze Threaded Pipe Flanges

Low-Pressure Brass and Bronze Threaded Pipe Fittings

Brass and Bronze Unthreaded Pipe Flanges

Solder-Connect Fittings for Copper Tubing

Laboratory Flanges and Turrets

Covers for Steel Floor Outlet Boxes

Carpet Flanges for Steel Floor Outlet Boxes