3 1/2 Pipe Size Connectors

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	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

NPSM

NPT

	Type Type


Adapter	Bushing

Flange	Locknut

Pipe	Reducer

Reducing Adapter

	Material Material

	Finish Finish

Black Coated

Galvanized

Zinc Plated

	Shape Shape

	Straight

	Connection Type Connection Type


Conduit	Electrical Box

Pipe	Tube

	Connection Style Connection Style

	Gender Gender

Female

Male

	System of Measurement System of Measurement

Inch

	Length Length

	Conduit Trade Size Conduit Trade Size

3 1/2

	For Use With For Use With

	For Pipe Schedule For Pipe Schedule

	40

	Specifications Met Specifications Met

	Maximum Pressure Maximum Pressure

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

DFARS Specialty Metals
COTS-Exempt

	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

	Pressure Class Pressure Class

125

150

	For Pipe Material For Pipe Material

Brass

Steel

	OD OD

	Threading Threading

Unthreaded

	Schedule Schedule

	40

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36 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.

About Conduit

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

Straight Adapters, Tube × Female Threaded Pipe

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

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:
Brass: Air, Drinking Water, Natural Gas, Oil
Bronze: Air, Natural Gas, Oil, Steam, Water
Pressure Class : 125
Specifications Met: See table
Pipe Nipples and Pipe: Use Schedule 40 brass
Flanges: See table

Pipe Size					For Flange
(A)	(B)	Max. Pressure	Material	Hex Width	Class	Material	Specifications Met		Each
NPT Male × NPT Female
3 1/2	3	200 psi @ 72° F	Brass	4 1/4"	150	Brass	ASME B1.20.1, ASME B16.15, NSF/ANSI 61	00000000	0000000
4	3 1/2	200 psi @ 72° F	Brass	4 5/8"	150	Brass	ASME B1.20.1, ASME B16.15, NSF/ANSI 61	00000000	000000

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
Pressure Class: See table
Pipe Nipples and Pipe: Use Schedule 40 steel

Pipe Size
(A)	(B)	Pressure 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	ASME B16.14	000000000	000000
3 1/2	1 1/4	125	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	ASME B16.14	000000000	00000
3 1/2	1 1/2	125	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	ASME B16.14	000000000	00000
3 1/2	2	125	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	ASME B16.14	000000000	00000
3 1/2	2 1/2	125	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	ASME B16.14	000000000	00000
3 1/2	3	125	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	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
Pressure Class: 150
Specifications Met:
NPT: ASME B1.20.1, 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 Steel Threaded Pipe Flanges

Use these flanges for low-pressure applications in noncorrosive environments. Bolt two flanges of the same size together with a gasket (sold separately) to create an access point within a line.

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

Flanges

Front

Raised Surface on Back

For Use With: Air, Natural Gas, Oil, Steam, Water
Pressure Class: 150
Specifications Met:
NPT: ASME B16.5, ASTM A105, MSS SP-25
BSPT: ASTM A105
Pipe Nipples and Pipe: Use Schedule 40 steel
Fittings: Use Class 125 or 150 iron and steel

			Bolt Hole
Pipe Size	Flange OD	For Bolt Dia.	Dia.	No. of	Bolt Circle Dia.	Max. Pressure	Max. Steam Pressure	Material		Each
NPT
3 1/2	8 1/2"	5/8"	3/4"	8	7"	285 psi @ 72° F	230 psi @ 300° F	Steel	000000000	0000000

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
Pressure 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)	Pressure 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	0000000
3 1/2	1	125	125 psi @ 72° F	125 psi @ 350° F	Galvanized Iron	ASME B1.20.1, 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	ASME B1.20.1, 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	ASME B1.20.1, ASME B16.14, ASTM A126, UL Listed	00000000	000000
3 1/2	2	125	125 psi @ 72° F	125 psi @ 350° F	Galvanized Iron	ASME B1.20.1, ASME B16.14, ASTM A126, UL Listed	00000000	000000
3 1/2	2 1/2	125	125 psi @ 72° F	125 psi @ 350° F	Galvanized Iron	ASME B1.20.1, ASME B16.14, ASTM A126, UL Listed	00000000	000000
3 1/2	3	125	125 psi @ 72° F	125 psi @ 350° F	Galvanized Iron	ASME B1.20.1, ASME B16.14, ASTM A126, UL Listed	00000000	000000

Straight Reducers

For Use With: Air, Steam, Oil, Water, Natural Gas
Pressure Class: 150
Specifications Met:
NPT: ASME B1.20.1, 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

Standard-Wall Plastic Pipe for Water

Connect this pipe to standard-wall plastic pipe fittings for a variety of residential and commercial low-pressure plumbing and water supply applications. It’s made of PVC, which has good corrosion resistance. Connect to unthreaded female socket-connect fittings using a PVC primer and cement (also known as solvent weld).

Pipe for drinking water meets NSF/ANSI Standard 61.

Pipe that meets ASTM D1784 and ASTM D1785 adheres to specifications and testing requirements for material quality.

Bend radius is the point to which you can bend pipe or tubing without damaging it. The smaller the measurement, the better the bend.

Warning: Never use plastic pipe fittings and pipe with compressed air or gas.

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

Rigid Pipe

For Use With: Drinking Water, Water
Maximum Temperature: 140° F
Specifications Met: ASTM D1784, ASTM D1785, NSF/ANSI 61
Fittings: Use Schedule 40 PVC Plastic
Flanges: Use Schedule 40 PVC Plastic

								5ft.		10ft.
Pipe Size	Schedule	OD	ID	Wall Thick.	Color	Clarity	Max. Pressure		Each		Each
3 1/2	40	4"	3.548"	0.226"	White	Opaque	240 psi @ 72° F	000000000	000000	000000000	0000000

Pipe Cement for Max. Pipe Size 6

00000000

Each

00000

Clear Blue Rigid Pipe

For Use With: Drinking Water, Water
Maximum Temperature: 140° F
Specifications Met: ASTM D1784, ASTM D1785, NSF/ANSI 61
Fittings: Use Schedule 40 PVC Plastic
Flanges: Use Schedule 40 PVC Plastic

Clear pipe allows you to see what’s flowing through the line.

						10ft.
Pipe Size	Schedule	OD	ID	Wall Thick.	Max. Pressure		Each
3 1/2	40	4"	3.548"	0.226"	120 psi @ 72° F	000000000	0000000

Pipe Cement for Max. Pipe Size 6

00000000

Each

00000

Adapters for Rigid Stainless Steel Conduit

Threaded Conduit Connection

Also known as hubs, these adapters attach rigid stainless steel conduit to a knockout in an outlet box or enclosure. They are corrosion resistant, so you can use them in food-processing and chemical plants.

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

Conduit Connection				Electrical Box Connection
Conduit Trade Size	Pipe Size	Thread Type	Gender	Pipe Size	Thread Type	Gender	Material	Gasket Material	Specifications Met		Each
Threaded Conduit Connection
3 1/2	3 1/2	NPT	Female	3 1/2	NPSM	Male	316 Stainless Steel	Fluoroelastomer Rubber	UL Listed, C-UL Listed	0000000	0000000

Locknuts for Metal Conduit Fittings

Zinc-Plated Steel,
316 Stainless
Steel, and Aluminum

Zinc-Plated Steel with PVC Molded Gasket

Secure threaded metal conduit fittings to a knockout in an outlet box or enclosure.

Zinc-plated steel, 316 stainless steel, and aluminum locknuts are compatible with NPSL and NPSM threads.

Locknuts with a PVC molded gasket create a seal for moisture protection.

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

Zinc-Plated Steel
Pipe Size	Specifications Met		Each
NPSM Threads
3 1/2	CSA Certified	00000000	00000
Zinc-Plated Steel with PVC Molded Gasket
NPSM Threads
3 1/2	CSA Certified	00000000	00000

Email Us

How to Identify and Measure Fittings

About Conduit

Vacuum Fittings for Steel Tubing

Low-Pressure Brass and Bronze Threaded Pipe Fittings

Low-Pressure Iron and Steel Threaded Pipe Fittings

Low-Pressure Steel Threaded Pipe Flanges

Low-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

Standard-Wall Plastic Pipe for Water

Adapters for Rigid Stainless Steel Conduit

Locknuts for Metal Conduit Fittings