Iron Nipples | McMaster-Carr

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	Pipe Size Pipe Size

	Thread Type Thread Type

BSPP

BSPT

NPT

	Type Type


Pipe	Adapter

Reducer	Reducing Adapter

	Material Material	Show

Iron

	Material Material	Hide

	Threading Threading

Threaded on Both Ends

Unthreaded

	Shape Shape

	Straight

	System of Measurement System of Measurement

Inch

	Length Length

	For Use With For Use With

	Wall Thickness Wall Thickness

	OD OD

	Connection Style Connection Style

Threaded

Clamp On

Claw

	ID ID

	Schedule Schedule

	80

	Connection Type Connection Type


Pipe	Hose

	Gender Gender

Male

Female

	Finish Finish

Galvanized

Zinc Plated

Enamel Coated

	Construction Construction

Seamless

	Specifications Met Specifications Met

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

REACH Compliant

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

RoHS Compliant

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

DFARS Specialty Metals
COTS-Exempt

	Maximum Pressure Maximum Pressure

47 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.

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

Made of galvanized iron or steel, this pipe has fair corrosion resistance. It has thick, Schedule 80 walls for good strength in medium-pressure applications.

Seamless pipe has a smooth interior for unrestricted flow and is stronger than welded pipe.

Straight reducers are also known as swage nipples.

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

Reducers, Threaded on Both Ends

Reducer

For Use With: Air, Natural Gas, Nitrogen Gas, Oil, Steam, Water
Specifications Met: ASTM B633, ASTM A234, MSS SP-95, ASME B1.20.1
Fittings: Use Class 300 iron or steel
Flanges: Use Class 300 steel

Pipe Size
(A)	(B)	Lg.	Thread Type	Construction	Material		Each
3/4	1/8	3"	NPT	Seamless	Galvanized Iron	00000000	000000
2	1/4	6 1/2"	NPT	Seamless	Galvanized Iron	00000000	000000
2 1/2	3/4	7"	NPT	Seamless	Galvanized Iron	00000000	000000
2 1/2	1	7"	NPT	Seamless	Galvanized Iron	00000000	000000
2 1/2	1 1/4	7"	NPT	Seamless	Galvanized Iron	00000000	000000
2 1/2	1 1/2	7"	NPT	Seamless	Galvanized Iron	00000000	000000
2 1/2	2	7"	NPT	Seamless	Galvanized Iron	00000000	000000
3	1/2	8"	NPT	Seamless	Galvanized Iron	00000000	000000
3	3/4	8"	NPT	Seamless	Galvanized Iron	00000000	000000
3	1	8"	NPT	Seamless	Galvanized Iron	00000000	000000
3	1 1/4	8"	NPT	Seamless	Galvanized Iron	00000000	000000
3	1 1/2	8"	NPT	Seamless	Galvanized Iron	00000000	000000
3	2	8"	NPT	Seamless	Galvanized Iron	00000000	000000
3	2 1/2	8"	NPT	Seamless	Galvanized Iron	00000000	000000
4	1/2	9"	NPT	Seamless	Galvanized Iron	00000000	000000
4	3/4	9"	NPT	Seamless	Galvanized Iron	00000000	000000
4	1	9"	NPT	Seamless	Galvanized Iron	00000000	000000
4	1 1/4	9"	NPT	Seamless	Galvanized Iron	00000000	000000
4	1 1/2	9"	NPT	Seamless	Galvanized Iron	00000000	000000
4	2	9"	NPT	Seamless	Galvanized Iron	00000000	000000
4	2 1/2	9"	NPT	Seamless	Galvanized Iron	00000000	000000
4	3	9"	NPT	Seamless	Galvanized Iron	00000000	000000

Grooved-End Iron Pipe Fittings

The grooved ends on these fittings connect to pipe with a clamp to easily install piping systems. Since there’s no heat or threading required, they provide quick access to a pipe line for routine maintenance. Fittings are also known as Victaulic fittings. They are for use in noncorrosive applications.

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

Straight Reducing Adapters

For Use With: Air, Water
Temperature Range: -30° to 250° F
Specifications Met: ASTM A536, FM Approved, UL Listed

Pipe Size
(A)	(B)	Max. Pressure	Color	Material		Each
Grooved End × NPT Male
2	1	750 psi @ 72° F	Orange	Enamel-Coated Iron	00000000	000000
2	1 1/2	750 psi @ 72° F	Orange	Enamel-Coated Iron	00000000	00000
2 1/2	1 1/2	750 psi @ 72° F	Orange	Enamel-Coated Iron	00000000	000000
2 1/2	2	750 psi @ 72° F	Orange	Enamel-Coated Iron	00000000	00000

Drain, Waste, and Vent Iron Pipe

Use this pipe in gravity-flow applications both above and below ground. It is also known as no-hub pipe and soil pipe. To connect, butt the end of a fitting up against pipe or another fitting and connect with a low-pressure clamp-on connector (sold separately). The clamp-on connector is also known as a no-hub coupling. Fittings are for use in noncorrosive environments. Pipe is seamless, so it has a smooth interior for unrestricted flow. It is for use in noncorrosive environments.

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

Pipe

For Use With: Water
Specifications Met: ASTM A888, CISPI 301

2 Pipe Size
Lg., ft.	Construction		Each
1	Seamless	0000000	000000
3	Seamless	0000000	00000
3 Pipe Size
1	Seamless	0000000	00000
3	Seamless	0000000	00000
4 Pipe Size
1	Seamless	0000000	00000
3	Seamless	0000000	00000

Straight Connectors

For Use With: Water
Temperature Range: 0° to 180° F
Specifications Met: ASTM A666, ASTM C564
For Pipe Material: Aluminum, Iron, Steel, Stainless Steel, PVC Plastic

For Pipe Size	Lg.	Max. Pressure	Material	Sleeve Material		Each
2	3"	15 psi @ 72° F	304 Stainless Steel	Neoprene Rubber	0000000	000000
3	3"	15 psi @ 72° F	304 Stainless Steel	Neoprene Rubber	0000000	00000
4	3"	15 psi @ 72° F	304 Stainless Steel	Neoprene Rubber	0000000	00000

Straight Adapters

For Use With: Water
Temperature Range: 0° to 180° F
Specifications Met: ASTM A666, ASTM C564
For Pipe Material: Aluminum, Iron, Steel, Stainless Steel, PVC Plastic
For Tube Material: Copper

For Pipe Size	For Copper Tube Size	Lg.	Max. Pressure	Material	Sleeve Material		Each
2	2	3"	15 psi @ 72° F	304 Stainless Steel	Neoprene Rubber	0000000	000000
3	3	3"	15 psi @ 72° F	304 Stainless Steel	Neoprene Rubber	0000000	00000
4	4	3"	15 psi @ 72° F	304 Stainless Steel	Neoprene Rubber	0000000	00000

Straight Reducers

For Use With: Water
Temperature Range: 0° to 180° F
Specifications Met: ASTM A666, ASTM C564
For Pipe Material: Aluminum, Iron, Steel, Stainless Steel, PVC Plastic

For Pipe Size
(A)	(B)	Lg.	Max. Pressure	Material	Sleeve Material		Each
2	1 1/2	3"	15 psi @ 72° F	304 Stainless Steel	Neoprene Rubber	0000000	000000
3	2	3"	15 psi @ 72° F	304 Stainless Steel	Neoprene Rubber	0000000	00000
4	3	3"	15 psi @ 72° F	304 Stainless Steel	Neoprene Rubber	0000000	00000

Twist-Claw Hose Couplings for Air and Water

Also known as Chicago and universal couplings, these have an identical claw-style head that allows you to connect to another Chicago twist-claw hose coupling, regardless of the pipe size or barbed hose ID. To connect, push two couplings together with a quarter twist. Couplings have a safety clip and lanyard to prevent accidental disconnection.

Iron couplings are stronger and more durable than other metal couplings. Use in noncorrosive environments. Warning: There is no valve in these couplings. Stop the flow of air and water before you disconnect the line.

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

Straight Adapters, BSPT Male Threaded Pipe

Maximum Pressure: 150 psi @ 72° F
Maximum Vacuum: Not Rated
Temperature Range: -20° to 160° F
Compatible With: Dixon Air King Couplings

Zinc-Plated Iron
Pipe Size	Includes		Each
1/2	Safety Clip with Lanyard	00000000	000000
3/4	Safety Clip with Lanyard	00000000	00000
1	Safety Clip with Lanyard	00000000	00000

Straight Adapters, BSPP Female Threaded Pipe

Maximum Pressure: 150 psi @ 72° F
Maximum Vacuum: Not Rated
Temperature Range: -20° to 160° F
Compatible With: Dixon Air King Couplings

Zinc-Plated Iron
Pipe Size	Includes		Each
1/2	Safety Clip with Lanyard	00000000	000000
3/4	Safety Clip with Lanyard	00000000	00000
1	Safety Clip with Lanyard	00000000	00000