Test Caps | McMaster-Carr

	System of Measurement System of Measurement

Inch

Metric

	For OD For OD

	For Shape For Shape


Round	Corner

	Color Color

	Red
	Black
	White
	Yellow
	Blue
	Green
	Pink
	Dark Blue
	Dark Brown
	Dark Green
	Dark Red
	Light Brown
	Light Gray
	Off-White
	Orange
	Silver
	Tan

	Material Material

	Cap Type Cap Type


Push On	Stretchable

Snap On

	Inside Height Inside Height

	Profile Profile


Straight	Tapered

	For Pipe Size For Pipe Size

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

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

DFARS Specialty Metals
COTS-Exempt

	Maximum Temperature Maximum Temperature

	Flexibility Flexibility

Flexible

Rigid

	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

	For Surface Type For Surface Type

Unthreaded

Threaded

	For Connection Type For Connection Type

	For Maximum ID For Maximum ID

	Height Height

	For Maximum Pipe OD For Maximum Pipe OD

	Flange Diameter Flange Diameter

	For Thread Diameter For Thread Diameter

	Diameter Diameter

5 1/8"

6 1/8"

8 3/8"

	For Minimum ID For Minimum ID

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410 Products

Control of Liquids, Gases, and Solids

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.

Drain Cleanout Hole Covers

Allow easy access to cleanout plugs hidden behind walls and floors.

Cleanout Plugs

Close off your drain cleanout pipe with these plugs.

Floor Drain Backflow Preventers

Put an end to water damage from backed-up sewers. When water backs up, the rubber float will rise to seal off the drain. When water recedes, the float will drop for normal drainage.

Pressure Test Fittings

Check pressure without permanently installing a gauge.

Caps

Round Caps

Slide these flexible vinyl caps on and they conform for a snug fit.

Heavy Duty Round Caps

Made of rigid plastic, these caps are more wear resistant than vinyl caps but not as flexible.

Sure-Grip Round Caps

A long, textured pull tab provides a sure grip for quick removal even when wearing gloves.

Chemical-Resistant Round Caps

These caps have excellent chemical resistance for masking parts during chemical finishing applications such as plating and anodizing.

Tapered Caps

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

Corner Caps

Guard the corners of fragile materials such as glass and mirrors.

Stretchable Sealing Caps

Tug on the pull tabs to stretch these caps onto the tips of bottles, beakers, flasks, and cylinders, creating an airtight seal.

Hinged Fastener Caps

A one-piece hinged design allows frequent access to screw heads without misplacing the top. To conceal and protect the entire screw head, insert your screw through the hole in the base and flip the hinged top over.

Stretchable Flange Caps

Stretch these caps over flared edges such as flanged tubing and valve handles.

Tapered Plugs

Hollow Tapered Plugs

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