Butt-Weld Tube Caps | McMaster-Carr

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	Connection Style Connection Style	Show

	Butt Weld

	Connection Style Connection Style	Hide

	Material Material

Aluminum

Stainless Steel

Steel

	Type Type


Cap	Flange

Adapter

	Pipe Size Pipe Size

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

	System of Measurement System of Measurement

Inch

Metric

	For Tube OD For Tube OD

	Shape Shape

	Cap/Plug
	Straight

	For Pipe Schedule For Pipe Schedule


40	80

10

	For Pipe Material For Pipe Material

Steel

Stainless Steel

Aluminum

	Schedule Schedule


10	40

80

	Pressure Class Pressure Class

	For Tube Material For Tube Material

316/316L Stainless Steel

304/304L Stainless Steel

	For Use With For Use With

	Wall Thickness Wall Thickness

	Connection Type Connection Type


Tube	Pipe

	Appearance Appearance

Polished

Dull

	Length Length

	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

	Maximum Pressure Maximum Pressure

	Specifications Met Specifications Met

	Flanged Connection Surface Flanged Connection Surface


Raised	Flat

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261 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.

Butt-Weld Fittings for Stainless Steel Tubing

Butt-weld fittings allow for a smooth, flush connection that provides maximum flow.

Metal Pipe and Pipe Fittings

Standard-Wall Butt-Weld Steel Unthreaded Pipe Fittings

Butt-weld fittings allow for a smooth, flush connection that provides maximum flow.

Low-Pressure Steel Unthreaded Pipe Flanges

Bolt two flanges of the same size together with a gasket to create an access point in a pipe line.

Thick-Wall Butt-Weld Steel Unthreaded Pipe Fittings

Butt-weld fittings allow for a smooth, flush connection that provides maximum flow.

High-Pressure Steel Unthreaded Pipe Flanges

Forged for extra strength, these heavy duty unthreaded flanges can withstand high-pressure applications.

Extreme-Pressure Steel Unthreaded Pipe Flanges

For excellent strength in extreme-pressure applications, choose these heavy duty Pressure Class 1500 flanges.

Low-Pressure Stainless Steel Unthreaded Pipe Flanges

Bolt two same-size flanges together with a gasket to create an access point within a pipe line.

Standard-Wall Butt-Weld Stainless
Steel Unthreaded Pipe Fittings

Butt-weld fittings allow for a smooth, flush connection that provides maximum flow.

Thin-Wall Butt-Weld Stainless
Steel Unthreaded Pipe Fittings

Also known as Schedule 10 fittings, these are thin, lightweight, and corrosion resistant.

Thick-Wall Butt-Weld Stainless
Steel Unthreaded Pipe Fittings

Butt-weld fittings allow for a smooth, flush connection that provides maximum flow.

High-Pressure Stainless Steel Unthreaded Pipe Flanges

Use these heavy duty forged flanges for high-pressure applications.

Standard-Wall Butt-Weld Aluminum
Unthreaded Pipe Fittings

Also known as Schedule 40 fittings, these have thicker walls than our thin-wall aluminum unthreaded pipe fittings.

Aluminum Unthreaded Pipe Flanges

Use these unthreaded flanges in low-pressure applications. Also known as Pressure Class 125 flanges.

How to Identify and Measure Fittings

Butt-Weld Fittings for Stainless Steel Tubing

Butt-Weld Fittings for Stainless Steel Tubing

Metal Pipe and Pipe Fittings

Standard-Wall Butt-Weld Steel Unthreaded Pipe Fittings

Low-Pressure Steel Unthreaded Pipe Flanges

Thick-Wall Butt-Weld Steel Unthreaded Pipe Fittings

High-Pressure Steel Unthreaded Pipe Flanges

Extreme-Pressure Steel Unthreaded Pipe Flanges

Low-Pressure Stainless Steel Unthreaded Pipe Flanges

Standard-Wall Butt-Weld StainlessSteel Unthreaded Pipe Fittings

Thin-Wall Butt-Weld StainlessSteel Unthreaded Pipe Fittings

Thick-Wall Butt-Weld StainlessSteel Unthreaded Pipe Fittings

High-Pressure Stainless Steel Unthreaded Pipe Flanges

Standard-Wall Butt-Weld AluminumUnthreaded Pipe Fittings

Aluminum Unthreaded Pipe Flanges

Standard-Wall Butt-Weld Stainless
Steel Unthreaded Pipe Fittings

Thin-Wall Butt-Weld Stainless
Steel Unthreaded Pipe Fittings

Thick-Wall Butt-Weld Stainless
Steel Unthreaded Pipe Fittings

Standard-Wall Butt-Weld Aluminum
Unthreaded Pipe Fittings