For Pipe Size 8 Caps | McMaster-Carr

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	System of Measurement System of Measurement

Inch

	For OD For OD

8.67" to 8.73"

10 5/8"

	For Shape For Shape

	Round

	For Pipe Size For Pipe Size	Show

	For Pipe Size For Pipe Size	Hide

	Material Material

Plastic

Rubber

	For Hose ID For Hose ID

7.97"-8.14"

	Cap Type Cap Type


Push On	Adhesive Back

	Profile Profile

	Tapered

	Type Type

	Cap		Plug

	Inside Height Inside Height

1 1/2"

	Plug Type Plug Type

	Push In

	For Pipe OD For Pipe OD

8.38" to 8.62"

8 1/2"

	Color Color

	Black
	Red

	Maximum Temperature Maximum Temperature

100° to 249.9° F

Not Rated

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

RoHS Compliant

RoHS Compliant with
Exemptions

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

DFARS Specialty Metals
COTS-Exempt

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

REACH Compliant

	Flexibility Flexibility

Flexible

Rigid

	For Connection Type For Connection Type

Unthreaded Pipe

Flange

	For Surface Type For Surface Type

Unthreaded

	For Pipe Material For Pipe Material

	Height Height

	Shape Shape

	Cap/Plug

Forward

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10 Products

Tapered Caps

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

For technical drawings and 3-D models, click on a part number.

Caps for Unthreaded Pipe

Flexible Polyethylene Plastic
For OD	For Pipe Size	Inside Ht.	Max. Temp., °F	Color	Pkg. Qty.		Pkg.
8.67"-8.73"	8	1 1/2"	150°	Red	5	0000000	000000

Adhesive-Back Flange Caps

Stick these caps on the raised surfaces of flanges or other flat surfaces for extra protection during transport and storage.

For technical drawings and 3-D models, click on a part number.

Rigid Plastic
For Pipe Size	For OD	Adhesive Type	Max. Temp., °F	Color	Pkg. Qty.		Pkg.
8	10 5/8"	Rubber	160°	Black	1	0000000	000000

Hollow Tapered Plugs

The hollow construction allows these plugs to compress for a snug fit in threaded and unthreaded holes of varying diameters. Use the flange to remove them with ease.

For technical drawings and 3-D models, click on a part number.

Polyethylene Plastic
For Pipe Size	For ID	Ht.	Flange Dia.	Max. Temp., °F	Hardness	Color	Pkg. Qty.		Pkg.
For Unthreaded Pipe
8	7.97"-8.14"	1"	8 3/8"	150°	Durometer 45D	Red	5	0000000	000000

Low-Pressure Clamp-On Connectors for Drain, Waste, and Vent

Tighten the bands on these connectors to form a strong seal on pipe or fittings.

For technical drawings and 3-D models, click on a part number.

Caps

For Use With: Air, Water
Temperature Range: -40° to 120° F
Specifications Met: ASTM D5926
For Pipe Material: Stainless Steel, Iron, Steel, Aluminum, PVC Plastic, CPVC Plastic

Pipe
For Pipe OD	For Pipe Size	Max. Pressure	Material	Clamp Material	Flexibility		Each
8 1/2"	8	4 psi @ 72° F	PVC Plastic	300 Series Stainless Steel	Flexible	00000000	000000

Wing Nut Expansion Plugs

Twist the wing nut on these plugs to expand the seal and close off pipe openings. Maximum air back pressure is the amount of pressure a plug can withstand without moving. Maximum water back pressure refers to the pressure resulting from the height of the water above the plug.

A wide top flange on Style B stops these plugs from falling into pipes.

For technical drawings and 3-D models, click on a part number.

For Pipe		Max. Back Pressure
Size	ID	Air, psi	Water, ft. of head	O'all Ht.	Temp. Range, °F	Seal Material		Each
Style B
Plastic Plate
8	7.70"-8.03"	17	40	3 3/4"	-20° to 125°	Natural Rubber	0000000	000000

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. Maximum air back pressure is the amount of pressure a plug can withstand without moving. Maximum water back pressure refers to the pressure resulting from the height of the water above the plug.

For Pipe		Max. Back Pressure				Material		Bypass
Size	ID	Air, psi	Water, ft. of head	O'all Ht.	Temp. Range, °F	Seal	Bypass Cap	Pipe Size	Thread Type	Gender		Each
Style C
Iron Stem
8	7.50"-8.00"	Not Rated	4	14 3/4"	30° to 150°	Natural Rubber	Metal	1/2	NPT	Male	0000000	0000000

Air-Inflatable Plugs

Conform to wide and out-of-round pipes with these inflatable plugs. Also known as pneumatic plugs, they're designed for temporary seals since they can lose pressure over time. Inflate with a hand pump (sold separately); an air compressor may overinflate the plug and cause damage. Tether the plugs using either the eyebolt or chain/ring so they don't get lost or stuck in your pipes. Maximum air back pressure is the amount of pressure a plug can withstand without moving. Maximum water back pressure refers to the pressure resulting from the height of the water above the plug.

With Eyebolt

For Pipe		Deflated		Max. Back Pressure				Material
Size	ID	Dia.	Ht.	Air, psi	Water, ft. of head	Required Inflation Pressure, psi	Temp. Range, °F	Seal	Eyebolt		Each
8	7.00"-8.25"	6 3/4"	10 1/4"	17	40	25	-20° to 125°	Natural Rubber	Zinc-Plated Steel	000000	0000000

Air-Inflatable Plugs with Bypass

Conform to wide and out-of-round pipes with these inflatable plugs. Also known as pneumatic plugs, they're designed for temporary seals since they can lose pressure over time. Use the bypass tube on these plugs to add air, water, and other fluid to your pipeline or to relieve pressure while testing. Inflate with a hand pump (sold separately); an air compressor may overinflate the plug and cause damage. Tether the plugs using either the eyebolt or chain/ring so they don't get lost or stuck in your pipes. Maximum air back pressure is the amount of pressure a plug can withstand without moving. Maximum water back pressure refers to the pressure resulting from the height of the water above the plug.

With Eyebolt

For Pipe		Deflated		Max. Back Pressure			Bypass				Material
Size	ID	Dia.	Ht.	Air, psi	Water, ft. of head	Required Inflation Pressure, psi	Pipe Size	Thread Type	Gender	Temp. Range, °F	Seal	Eyebolt		Each
8	7.00"-8.25"	6 3/4"	10"	13	30	35	3	NPT	Female	-20° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	0000000

Deep-Reach Wing Nut Expansion Plugs

Plastic Plate

Insert these plugs deep within your pipe to seal it off from the inside. Maximum air back pressure is the amount of pressure a plug can withstand without moving. Maximum water back pressure refers to the pressure resulting from the height of the water above the plug.

For technical drawings and 3-D models, click on a part number.

For Pipe		Max. Back Pressure
Size	ID	Air, psi	Water, ft. of head	O'all Ht.	Temp. Range, °F	Seal Material		Each
Plastic Plate
8	7.70"-8.03"	17	40	3 3/4"	0° to 125°	Natural Rubber	0000000	000000

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.

For Pipe		Max. Back Pressure
Size	OD	Water, ft. of head	Air	Temp. Range	Material	Clamp Material		Each
8	8.38"-8.62"	10	Not Rated	Not Rated	Neoprene Rubber	Stainless Steel	0000000	000000