Steel Line | McMaster-Carr

	Pipe Size Pipe Size

1/8
1/4
3/8
1/2
3/4
1
1 1/4
1 1/2
2
2 1/2
3
4
6
8

	Thread Type Thread Type

NPT

BSPT

	Threading Threading

Threaded on Both Ends

Threaded on One End

Unthreaded

Fully Threaded

	System of Measurement System of Measurement

Inch

Metric

	Length Length

	Schedule Schedule


40	80

160	XXH

	Type Type


Pipe	Adapter

Reducer

	OD OD

	ID ID

	For Use With For Use With

	Finish Finish

Black Coated

Zinc Plated

Zinc Yellow-Chromate Plated

Painted

Galvanized

	Connection Style Connection Style

	Wall Thickness Wall Thickness

	Construction Construction

Welded

Seamless

	Specifications Met Specifications Met

	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

RoHS Compliant with
Exemptions

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

REACH Compliant

	Maximum Pressure Maximum Pressure

	Compatible Tube Fittings Compatible Tube Fittings

	Compression
	Flared
	Vacuum

	Form Form

Straight

Coil

	Fabrication Fabrication

Seamless

Welded

	Flareable Flareable

Yes

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2,243 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.

Smooth-Bore Seamless Steel Tubing

Seamless construction with no weld bead gives this tubing an interior with unrestricted flow. It can be flared without splitting.

Welded Steel Tubing

Tubing is welded with a smoothed weld bead on the inside to reduce particle buildup. It is also known as DOM (drawn over mandrel) tubing.

Precision Steel Tubing

With the lowest OD tolerance of all our steel tubing, this tubing is designed for precision applications.

Corrosion-Resistant Steel Tubing

A thin layer of zinc yellow-chromate gives this tubing extra corrosion resistance, making it an economical alternative to stainless steel.

Vacuum-Rated Large-Diameter Steel Tubing

This tubing has the strength to withstand vacuum applications up to 29" Hg.

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 Steel Pipe Nipples and Pipe
with Right-Hand and Left-Hand Threads

Pipe has clockwise (right-hand) threads on one end and counterclockwise (left-hand) threads on the other end. When you use a wrench to turn, connections on both ends tighten at the same time.

Standard-Wall Steel Threaded
Pipe Nipple and Pipe Assortments

Assortments contain threaded pipe in various lengths.

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.

Standard-Wall Galvanized Steel Threaded
Pipe Nipple and Pipe Assortments

Assortments contain threaded pipe in various lengths.

Standard-Wall Galvanized Steel Pipe Nipples
and Pipe for Joining Dissimilar Metals

A plastic sleeve prevents destructive corrosion when connecting different metals.

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.

Thick-Wall Steel Threaded Pipe Nipples and Pipe

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

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

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

Super-Thick-Wall Steel Threaded Pipe Nipples and Pipe

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

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.

Extra-Thick-Wall Steel Unthreaded Pipe

Typically used with extreme-pressure iron and steel unthreaded pipe fittings. Pipe is also known as Schedule XXH .

Standard-Wall Grooved-End
Steel Pipe Nipples and Pipe

This steel pipe has grooved ends that connect to fittings with a clamp (sold separately) for an easy way to install piping systems.