Test Fittings | McMaster-Carr

	Pipe Size Pipe Size

	Thread Type Thread Type

	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	For Pipe Size For Pipe Size

	Material Material

	Type Type

Adapter

Plug

	For Use With For Use With

	For Minimum Pipe ID For Minimum Pipe ID

	Expansion Plug Type Expansion Plug Type


Wing Nut	Snap

T-Handle	Inflatable

Hex Nut	Square Head

	Maximum Pressure Maximum Pressure

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

DFARS Specialty Metals
COTS-Exempt

	Sealing Location Sealing Location


End of Pipe	Inside Pipe	End of Tube

	Maximum Temperature Maximum Temperature

	Minimum Temperature Minimum Temperature

	Plug Type Plug Type


Screw In	Expandable

	Shape Shape

	Straight
	Cap/Plug

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

RoHS Compliant

RoHS Compliant with
Exemptions

	Gender Gender

Male

Female

	For Maximum Pipe ID For Maximum Pipe ID

	Maximum Air Back Pressure Maximum Air Back Pressure

	Plate Material Plate Material

Stainless Steel

Steel

Plastic

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

REACH Compliant

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510 Products

Pressure and Vacuum Monitoring and Control

Quick-Install Pressure Test Fittings

Tighten these threaded fittings with your hands for a secure connection in testing, flushing, venting, and plugging applications—no tools, tape, or sealant required.

Pressure Test Fittings

Check pressure without permanently installing a gauge.

T-Handle Expansion Plugs

Twist the easy-grip t-handle on these plugs to expand the seal.

Hex-Nut Expansion Plugs

Tighten the nut on these plugs to expand the seal.

Quick-Snap Expansion Plugs

Turn the cam handle to expand the seal, then snap the handle down to hold it in place.

Square-Head Expansion Plugs

Turn the square head of the plug into the sealing ring to close off pipe openings.

Wing Nut Expansion Plugs

Twist the wing nut on these plugs to expand the seal.

Expansion Plugs with Bypass

Use the bypass tube on these plugs to add air, water, and other fluid to your pipeline or to relieve pressure while testing.

Air-Inflatable Plugs

Also known as pneumatic plugs, these plugs conform to wide and out-of-round pipes.

Air- and Water-Inflatable Plugs

Penetrate tight pipe junctures with the most flexible expansion plugs we offer.

Air- and Water-Inflatable Plugs for Y-Joints

These extra-long plugs allow you to seal off two pipes at the same time. They have two separate inflation chambers to release back pressure gradually and prevent splash back as water clears the drain line.

Air-Inflatable Plugs with Bypass

Use the bypass tube on these plugs to add air, water, and other fluid to your pipeline or to relieve back pressure while testing.

Deep-Reach Hex Nut Expansion Plugs with Bypass

Use the bypass tube to add air, water, and fluid or relieve back pressure.

Deep-Reach Wing Nut Expansion Plugs

Insert these plugs deep within your pipe to seal it off from the inside.

Expansion Plugs for Tubing

These plugs are designed for metal and rigid plastic tubing.

Plugs

Expandable Tapered Plugs

Place a plug into an opening and tighten the wing nut—the sides expand to create a seal in holes of varying diameters.

Expandable High-Temperature Tapered Plugs

Place a plug into an opening and tighten the wing nut—the sides expand to create a seal in holes of varying diameters. Good for paint baking and powder-coating applications, these plugs withstand temperatures up to 450° F.

Threaded Round Plugs for 37° Flared Tube

Designed to fit into 37° flared connections such as those found on JIC and SAE fittings, these plugs protect internally threaded connections from contaminants during fabrication and storage.

Threaded Round Plugs for Straight-Thread Pipe

Seal tube and hose fittings to keep their straight threads protected from contaminants during fabrication and storage.

Threaded Round Plugs for NPT Pipe

Protect internally threaded NPT connections from contaminants during fabrication and storage.

High-Temperature Round Plugs for NPT Pipe

These plugs withstand temperatures up to 600° F to protect internally threaded NPT connections from contaminants during electropainting, paint baking, and powder coating applications.

Threaded Round Plugs for BSPT Pipe

Safeguard internally threaded BSPT connections from contaminants during fabrication and storage.

Cleanout and Drain Pipe Plugs

Drain Pipe Plugs

Seal unthreaded pipe ends with these plugs. They come with a band that clamps over the outside wall of your pipe and tightens with a screwdriver.

Cleanout Plugs

Close off your drain cleanout pipe with these plugs.