3 1/2 Pipe Size Couplings

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	Material Material

Brass

Iron

Steel

	Type Type


Adapter	Reducer

Reducing Adapter	Bushing

	Pipe Size Pipe Size	Show

3 1/2

	Pipe Size Pipe Size	Hide

1/16
1/8
1/4
3/8
1/2
5/8
3/4
1
1 1/4
1 1/2
2
2 1/2
3
3 1/2
4
5
6
8
10
12

	Thread Type Thread Type

NPT

	Connection Style Connection Style

Threaded

Clamp On

	Gender Gender

Female

Male

	For Pipe Material For Pipe Material

Steel

Brass

	For Use With For Use With

	Connection Type Connection Type


Pipe	Tube

	Shape Shape

	Straight

	Maximum Pressure Maximum Pressure

	System of Measurement System of Measurement

Inch

	Length Length

	Finish Finish

Black Coated

Galvanized

	For Pipe Schedule For Pipe Schedule

	40

	Class Class

125

150

	Specifications Met Specifications Met

ANSI/ASME

ASME

ASTM

NSF/ANSI

	Body Shape Body Shape

	Hex

	Maximum Steam Pressure Maximum Steam Pressure

125 psi @ 350° F

150 psi @ 350° F

	Hex Width Hex Width

	Environment Environment

Food and Beverage

	Clamp-On Connection Type Clamp-On Connection Type

	Compression

	For Tube Material For Tube Material

Steel

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28 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.

Low-Pressure Iron and Steel Threaded Pipe Fittings

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

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

Bushing Straight Reducing Adapters with Hex Body

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: See table
Pipe Nipples and Pipe: Use Schedule 40 steel

Pipe Size
(A)	(B)	Class	Max. Pressure	Max. Steam Pressure	Material	Specifications Met		Each
NPT Male × NPT Female
3 1/2	1	125	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	ANSI/ASME B16.14	000000000	000000
3 1/2	1 1/4	125	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	ANSI/ASME B16.14	000000000	00000
3 1/2	1 1/2	125	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	ANSI/ASME B16.14	000000000	00000
3 1/2	2	125	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	ANSI/ASME B16.14	000000000	00000
3 1/2	2 1/2	125	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	ANSI/ASME B16.14	000000000	00000
3 1/2	3	125	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	ANSI/ASME B16.14	000000000	00000
4	3 1/2	150	150 psi @ 72° F	150 psi @ 350° F	Black-Coated Iron	ASME B16.14	000000000	00000

Straight Reducers

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: 150
Specifications Met:
NPT: ANSI/ASME B1.20.1, ANSI/ASME B16.3, UL Listed
BSPT: DIN EN 10226
Pipe Nipples and Pipe: Use Schedule 40 steel

Pipe Size
(A)	(B)	Max. Pressure	Max. Steam Pressure	Material		Each
NPT Female
3 1/2	2	150 psi @ 72° F	150 psi @ 350° F	Black-Coated Iron	000000000	0000000
3 1/2	2 1/2	150 psi @ 72° F	150 psi @ 350° F	Black-Coated Iron	000000000	000000
3 1/2	3	150 psi @ 72° F	150 psi @ 350° F	Black-Coated Iron	000000000	000000
4	3 1/2	150 psi @ 72° F	150 psi @ 350° F	Black-Coated Iron	000000000	000000

Low-Pressure Galvanized Iron
and Steel Threaded Pipe Fittings

The galvanized finish on these fittings provides fair corrosion resistance. Fittings are for use in low-pressure applications.

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

Bushing Straight Reducing Adapters with Hex Body

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: See table
Specifications Met: See table
Pipe Nipples and Pipe: Use Schedule 40 galvanized steel
Flanges: Use Class 150 galvanized steel

Pipe Size
(A)	(B)	Class	Max. Pressure	Max. Steam Pressure	Material	Specifications Met		Each
NPT Male × NPT Female
4	3 1/2	150	150 psi @ 72° F	150 psi @ 350° F	Galvanized Iron	ASME B16.14	00000000	000000
3 1/2	1	125	125 psi @ 72° F	125 psi @ 350° F	Galvanized Iron	ANSI/ASME B1.20.1, ANSI/ASME B16.14, ASTM A126, UL Listed	00000000	00000
3 1/2	1 1/4	125	125 psi @ 72° F	125 psi @ 350° F	Galvanized Iron	ANSI/ASME B1.20.1, ANSI/ASME B16.14, ASTM A126, UL Listed	00000000	00000
3 1/2	1 1/2	125	125 psi @ 72° F	125 psi @ 350° F	Galvanized Iron	ANSI/ASME B1.20.1, ANSI/ASME B16.14, ASTM A126, UL Listed	00000000	00000
3 1/2	2	125	125 psi @ 72° F	125 psi @ 350° F	Galvanized Iron	ANSI/ASME B1.20.1, ANSI/ASME B16.14, ASTM A126, UL Listed	00000000	00000
3 1/2	2 1/2	125	125 psi @ 72° F	125 psi @ 350° F	Galvanized Iron	ANSI/ASME B1.20.1, ANSI/ASME B16.14, ASTM A126, UL Listed	00000000	00000
3 1/2	3	125	125 psi @ 72° F	125 psi @ 350° F	Galvanized Iron	ANSI/ASME B1.20.1, ANSI/ASME B16.14, ASTM A126, UL Listed	00000000	00000

Straight Reducers

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: 150
Specifications Met:
NPT: ANSI/ASME B1.20.1, ANSI/ASME B16.3, ASTM A153, UL Listed
BSPT: ASTM A197, DIN EN 10226
Pipe Nipples and Pipe: Use Schedule 40 galvanized steel
Flanges: Use Class 150 galvanized steel

Pipe Size
(A)	(B)	Max. Pressure	Max. Steam Pressure	Material		Each
NPT Female
3 1/2	2	150 psi @ 72° F	150 psi @ 350° F	Galvanized Iron	00000000	0000000
3 1/2	2 1/2	150 psi @ 72° F	150 psi @ 350° F	Galvanized Iron	00000000	000000
3 1/2	3	150 psi @ 72° F	150 psi @ 350° F	Galvanized Iron	00000000	000000
4	3 1/2	150 psi @ 72° F	150 psi @ 350° F	Galvanized Iron	00000000	000000

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.

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

Bushing Straight Reducing Adapters with Hex Body

For Use With:
NPT × NPT: Air, Drinking Water, Natural Gas, Oil
BSPT × BSPT: Air, Natural Gas, Oil, Steam, Water
Class: 125
Specifications Met: See table
Pipe Nipples and Pipe: Use Schedule 40 brass
Flanges:
NPT: Use Class 150 brass
BSPT: Use Class 150 bronze

Pipe Size
(A)	(B)	Max. Pressure	Material	Specifications Met		Each
NPT Male × NPT Female
3 1/2	3	200 psi @ 72° F	Brass	ANSI/ASME B1.20.1, ANSI/ASME B16.15, NSF/ANSI 61	00000000	0000000
4	3 1/2	200 psi @ 72° F	Brass	ANSI/ASME B1.20.1, ANSI/ASME B16.15, NSF/ANSI 61	00000000	000000

Vacuum Fittings for Steel Tubing

For Use With: Air, Glass, Plastic Pellets, Resins, Wood Chips
Temperature Range: -10° to 180° F
Tubing: Galvanized Steel: Use with steel, galvanized steel
Steel: Use with steel

Use these fittings to create an air vacuum system without the hassle of brazing and welding. Insert two fittings into a clamp (sold separately) and tighten to form a secure seal.

Galvanized steel fittings have fair corrosion resistance. Fittings without a finish should only be used in noncorrosive environments.

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

Straight Adapters, Tube × Male Threaded Pipe

Galvanized Steel
For Tube OD	Pipe Size	Max. Pressure	Max. Vacuum		Each
NPT Threads
3 1/2"	3 1/2	15 psi @ 72° F	15 in. of Hg @ 72° F	00000000	000000
Steel
NPT Threads
3 1/2"	3 1/2	15 psi @ 72° F	15 in. of Hg @ 72° F	0000000	00000

Straight Adapters, Tube × Female Threaded Pipe

Galvanized Steel
For Tube OD	Pipe Size	Max. Pressure	Max. Vacuum		Each
NPT Threads
3 1/2"	3 1/2	15 psi @ 72° F	15 in. of Hg @ 72° F	00000000	000000
Steel
NPT Threads
3 1/2"	3 1/2	15 psi @ 72° F	15 in. of Hg @ 72° F	0000000	00000

Terms and Conditions and Privacy Policy

How to Identify and Measure Fittings

Low-Pressure Iron and Steel Threaded Pipe Fittings

Low-Pressure Galvanized Ironand Steel Threaded Pipe Fittings

Low-Pressure Brass and Bronze Threaded Pipe Fittings

Vacuum Fittings for Steel Tubing

Low-Pressure Galvanized Iron
and Steel Threaded Pipe Fittings