2 1/2 Nipples | McMaster-Carr

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	Pipe Size Pipe Size	Show

2 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

	Threading Threading

Threaded on Both Ends

Fully Threaded

Threaded on One End

Unthreaded

	Material Material

	System of Measurement System of Measurement

Inch

Metric

	Length Length

	Type Type


Pipe	Adapter

Connector	Reducer

Reducing Adapter

	Schedule Schedule


10	40

80	120

160

	Shape Shape


Straight	90° Elbow

	For Use With For Use With

	Connection Style Connection Style

	ID ID

	OD OD

	Wall Thickness Wall Thickness

	Specifications Met Specifications Met

	Gender Gender

Male

Female

	Connection Type Connection Type


Pipe	Hose

Tube

	Finish Finish

	Construction Construction

Welded

Seamless

	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

	Socket Connect Type Socket Connect Type


Weld	Cement

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423 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.

Standard-Wall Stainless Steel
Threaded Pipe Nipples and Pipe

Typically used with low-pressure stainless steel threaded pipe fittings.

Low-Pressure Stainless Steel Threaded Pipe Fittings

Use these corrosion-resistant fittings in a low-pressure pipe line.

Standard-Wall Stainless Steel
Unthreaded Pipe Nipples and Pipe

Typically used with standard-wall and low-pressure stainless steel unthreaded pipe fittings.

Thin-Wall Stainless Steel Unthreaded Pipe

Typically used with thin-wall stainless steel unthreaded pipe fittings.

Iron and Steel Pipe and Pipe Fittings

Standard-Wall Steel Threaded Pipe Nipples and Pipe

Also known as Schedule 40, this steel pipe is designed for low-pressure applications.

Standard-Wall Galvanized Steel
Threaded Pipe Nipples and Pipe

Made of galvanized steel, this Schedule 40 pipe has fair corrosion resistance and is designed for low-pressure applications.

Thick-Wall Steel Threaded Pipe Nipples and Pipe

Typically used with medium-pressure iron and steel threaded pipe fittings. Also known as Schedule 80.

Thick-Wall Galvanized Iron and Steel
Threaded Pipe Nipples and Pipe

Typically used with medium-pressure galvanized iron and steel threaded pipe fittings. Also known as Schedule 80.

Extra-Thick-Wall Steel Threaded Pipe Nipples and Pipe

Typically used with high-pressure iron and steel threaded pipe fittings. Also known as Schedule 160.

Thick-Wall Steel Unthreaded Pipe

Typically used with thick-wall and high-pressure iron and steel unthreaded pipe fittings. Also known as Schedule 80.

Standard-Wall Steel Unthreaded Pipe Nipples and Pipe

Typically used with standard-wall and low-pressure iron and steel unthreaded pipe fittings. Also known as Schedule 40.

Grooved-End Iron Pipe Fittings

The grooved ends on these iron fittings connect to pipe with a clamp to easily install piping systems.

Brass and Bronze Threaded Pipe and Pipe Fittings

Standard-Wall Brass Threaded Pipe Nipples and Pipe

Typically used with low-pressure brass and bronze threaded pipe fittings.

Thick-Wall Brass Threaded Pipe Nipples and Pipe

Typically used with medium-pressure brass and bronze threaded pipe fittings.

Aluminum Pipe and Pipe Fittings

Standard-Wall Aluminum
Threaded Pipe Nipples and Pipe

Typically used with low-pressure aluminum threaded pipe fittings.

Thick-Wall Aluminum Unthreaded Pipe

Typically used with thick-wall aluminum unthreaded pipe fittings.

Standard-Wall Aluminum
Unthreaded Pipe Nipples and Pipe

Typically used with standard-wall aluminum unthreaded pipe fittings.

Thin-Wall Aluminum Unthreaded Pipe

Typically used with thin-wall aluminum unthreaded pipe fittings.

Copper-Nickel Unthreaded Pipe

Also known as Class 200 pipe.

Plastic Pipe and Pipe Fittings for Water

Thick-Wall Plastic Pipe for Water

Connect to thick-wall plastic pipe fittings for use in heavy duty industrial plumbing and water supply applications, such as water processing, waste water treatment, and irrigation. Pipe can handle pressures up to 900 psi.

Standard-Wall Plastic Pipe for Water

Connect this pipe to standard-wall plastic pipe fittings in low- to medium-pressure applications up to 810 psi. It is typically used in residential and commercial plumbing and water supply applications.

Extra-Thick-Wall Plastic Pipe for Water

Extra-thick Schedule 120 walls give this pipe excellent strength in heavy duty industrial plumbing and water supply applications, such as water processing, waste water treatment, and irrigation. Use in high-pressure applications up to 1,000 psi. They connect to thick-wall plastic pipe fittings.

CPVC Pipe for Hot Water

Connect to CPVC pipe fittings for use in high-temperature plumbing and water supply applications up to 170° or 200° F.

Hose Fittings

Metal Barbed Hose Fittings for Air and Water

Metal hose fittings have better durability than plastic barbed hose fittings.

Easy-Fit Barbed Hose Fittings for Air and Water

Low-profile barbs and a longer first barb allow for a smoother, easier installation than other barbed fittings. Slide the barbed end into hose and secure with a clamp.

Metal Cam-and-Groove Hose Couplings for Water

Metal cam-and-groove couplings have better durability than plastic cam-and-groove couplings.

Easy-Fit Barbed Hose Fittings for Chemicals

Low-profile barbs and a longer first barb allow for a smoother, easier installation than other barbed fittings. Slide the barbed end into hose and secure with a clamp.

Metal Cam-and-Groove Hose
Couplings for Chemicals and Petroleum

Couplings are metal, which has better durability than plastic cam-and-groove hose couplings. They consist of a plug and a socket that connect and disconnect quickly. Use them if you need frequent access to a line. To connect, insert the plug into the socket and push the levers down.

Fire-Fighting Hose Fittings

Connect these fittings to fire hydrants and washdown equipment.

Rocker-Lug Fire-Fighting Hose Fittings

The rocker lugs on these fittings allow for easy gripping, so you can quickly connect to fire hydrants and washdown equipment.

Pin-Lug Fire-Fighting Hose Fittings

The pin lugs on these fittings allow for easy gripping, so you can quickly connect to fire hydrants and washdown equipment. They swivel until tightened for easier installation than other fire hose fittings.

Vacuum Fittings for Steel Tubing

Use these fittings in an air vacuum system to avoid the hassle of brazing and welding. Insert two fittings into a clamp and tighten to form a secure seal in steel tubing.

How to Identify and Measure Fittings

Stainless Steel Pipe and Pipe Fittings

Standard-Wall Stainless SteelThreaded Pipe Nipples and Pipe

Low-Pressure Stainless Steel Threaded Pipe Fittings

Standard-Wall Stainless SteelUnthreaded Pipe Nipples and Pipe

Thin-Wall Stainless Steel Unthreaded Pipe

Iron and Steel Pipe and Pipe Fittings

Standard-Wall Steel Threaded Pipe Nipples and Pipe

Standard-Wall Galvanized SteelThreaded Pipe Nipples and Pipe

Thick-Wall Steel Threaded Pipe Nipples and Pipe

Thick-Wall Galvanized Iron and SteelThreaded Pipe Nipples and Pipe

Extra-Thick-Wall Steel Threaded Pipe Nipples and Pipe

Thick-Wall Steel Unthreaded Pipe

Standard-Wall Steel Unthreaded Pipe Nipples and Pipe

Grooved-End Iron Pipe Fittings

Brass and Bronze Threaded Pipe and Pipe Fittings

Standard-Wall Brass Threaded Pipe Nipples and Pipe

Thick-Wall Brass Threaded Pipe Nipples and Pipe

Aluminum Pipe and Pipe Fittings

Standard-Wall AluminumThreaded Pipe Nipples and Pipe

Thick-Wall Aluminum Unthreaded Pipe

Standard-Wall AluminumUnthreaded Pipe Nipples and Pipe

Thin-Wall Aluminum Unthreaded Pipe

Copper-Nickel Unthreaded Pipe

Copper-Nickel Unthreaded Pipe

Plastic Pipe and Pipe Fittings for Water

Thick-Wall Plastic Pipe for Water

Standard-Wall Plastic Pipe for Water

Extra-Thick-Wall Plastic Pipe for Water

CPVC Pipe for Hot Water

Hose Fittings

Metal Barbed Hose Fittings for Air and Water

Easy-Fit Barbed Hose Fittings for Air and Water

Metal Cam-and-Groove Hose Couplings for Water

Easy-Fit Barbed Hose Fittings for Chemicals

Metal Cam-and-Groove HoseCouplings for Chemicals and Petroleum

Fire-Fighting Hose Fittings

Rocker-Lug Fire-Fighting Hose Fittings

Pin-Lug Fire-Fighting Hose Fittings

Vacuum Fittings for Steel Tubing

Vacuum Fittings for Steel Tubing

Standard-Wall Stainless Steel
Threaded Pipe Nipples and Pipe

Standard-Wall Stainless Steel
Unthreaded Pipe Nipples and Pipe

Standard-Wall Galvanized Steel
Threaded Pipe Nipples and Pipe

Thick-Wall Galvanized Iron and Steel
Threaded Pipe Nipples and Pipe

Standard-Wall Aluminum
Threaded Pipe Nipples and Pipe

Standard-Wall Aluminum
Unthreaded Pipe Nipples and Pipe

Metal Cam-and-Groove Hose
Couplings for Chemicals and Petroleum