Test Pumps and Plugs | McMaster-Carr

	For Pipe Size For Pipe Size

	Plug Type Plug Type


Push In	Expandable

Screw In	Three Prong

Tamper Evident

	Expansion Plug Type Expansion Plug Type


Wing Nut	T-Handle

Hex Nut	Snap

Inflatable	Square Head

	Sealing Location Sealing Location


End of Pipe	Inside Pipe	End of Tube

	Material Material

	For Minimum Pipe ID For Minimum Pipe ID

	Profile Profile


Tapered	Straight

	Plate Material Plate Material

Stainless Steel

Steel

Plastic

	Maximum Temperature Maximum Temperature

	For Maximum Pipe ID For Maximum Pipe ID

	System of Measurement System of Measurement

Inch

Metric

	For Maximum ID For Maximum ID

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

DFARS Specialty Metals
COTS-Exempt

	Height Height

	Maximum Air Back Pressure Maximum Air Back Pressure

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

RoHS Compliant

RoHS Compliant with
Exemptions

	Color Color

	Black		Red
	White		Yellow
	Blue		Clear
	Brown		Green
	Off-White		Pink
	Gray		Orange
	Purple

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

REACH Compliant

	For Minimum ID For Minimum ID

	Seal Material Seal Material

Rubber

Plastic

	For Surface Type For Surface Type

Unthreaded

Threaded

	Trade Size Trade Size

0000
000
00
0
1
2
3
4
5
5 1/2
6
6 1/2
7
7 1/2
8
8 1/2
9
9 1/2
10
10 1/2
11
11 1/2
12
13
13 1/2
14
15
16
17
18
19
20
21
22
23
24
25
26
28
30
32
36
38
40
42
A
B
C
D

	Maximum Water Back Pressure Maximum Water Back Pressure

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838 Products

Expansion Plugs

Wing Nut Expansion Plugs

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

T-Handle Expansion Plugs

Twist the easy-grip t-handle 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.

Hex-Nut Expansion Plugs

Tighten the nut on these plugs to expand the seal.

Square-Head Expansion Plugs

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

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.

Hand Pumps for Air-Inflatable Plugs

Fill your air-inflatable plugs with these lightweight hand pumps.

Deep-Reach Wing Nut Expansion Plugs

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

Deep-Reach Hex Nut Expansion Plugs with Bypass

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

Expansion Plugs for Tubing

These plugs are designed for metal and rigid plastic tubing.

Pressure Testing

Manual Pumps for Testing and Calibration

Manually pump air, water, or hydraulic fluid through your system so you can test for leaks.

Air-Powered Pumps for Testing

These pumps use compressed air to pump water or hydraulic fluid at high pressures through your system for leak testing.

Electric Pumps for Testing

Easier to use than manual pumps, these use electricity to quickly pump water through your system so you can test for leaks.

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.

Tapered Plugs

Often used as laboratory stoppers, these rubber plugs have good impact and abrasion resistance. They’re tapered to fit a range of hole diameters.

Hollow Tapered Plugs

The hollow construction allows these plugs to compress for a snug fit in threaded and unthreaded holes of varying diameters.

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.

Miniature Tapered Plugs

Sized to fit small openings, these tiny plugs fit snugly but can be removed easily using the flange. Their tapered design fits a range of hole diameters.

Pull-Ring Tapered Plugs

Pull the two built-in rings to quickly remove these plugs. All are tapered to fit a range of hole diameters.

Corks

Lightweight and moisture resistant, these plugs are laboratory-grade 100% natural cork. They’re tapered to fit a range of hole diameters.

Tamper-Evident Tapered Plugs

Often used on gas cylinders, these plugs cinch and lock tightly around valve heads to block the ports—they must be cut off making it clear if the cylinder has been tampered with. The plugs are tapered to fit a range of hole diameters.

High-Temperature Tapered Plugs

Good for electroplating, paint baking, and powder-coating applications, these plugs withstand temperatures up to 570° F. All are tapered to fit a range of hole diameters.

Hollow High-Temperature Tapered Plugs

The hollow construction allows these plugs to compress for a snug fit in threaded and unthreaded holes of varying diameters. Good for electroplating, paint baking, and powder-coating applications, they withstand temperatures up to 450° F.

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.

Miniature High-Temperature Tapered Plugs

Sized to fit small openings, these tiny plugs fit snugly but can be removed easily using the flange. They withstand temperatures up to 470° F, which makes them good for electroplating, paint baking, and powder-coating applications. All are tapered to fit a range of hole diameters.

Food Industry Tapered Plugs

Made of FDA listed materials, these plugs are suitable for food contact. They're tapered to fit a range of hole diameters.

Chemical-Resistant Tapered Plugs

These plugs have excellent chemical resistance for masking parts during chemical finishing applications such as plating and anodizing. Their tapered design fits a range of hole diameters.

Threaded Round Plugs

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 Straight-Thread Pipe

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

Threaded Round Plugs for BSPT Pipe

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

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.

Tapered Caps

These flexible plastic caps are tapered to fit a variety of unthreaded and threaded objects.

Cleanout and Drain Pipe Plugs

Cleanout Plugs

Close off your drain cleanout pipe with these 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.

Tube Plugs for Heat Exchangers

Plug leaky internal tubes in heat exchangers with these two-piece ring and pin sets.