Dark Gray Plugs | McMaster-Carr

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	Type Type


Cap	Flange

Plug

	Pipe Size Pipe Size

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

	Thread Type Thread Type

NPT

	Material Material

Plastic

Rubber

	Connection Style Connection Style

	Schedule Schedule

	80

	Shape Shape


Cap/Plug	Round

	For Pipe Material For Pipe Material

PVC Plastic

Polyethylene Plastic

	Color Color	Show

Dark Gray

	Color Color	Hide

	Drive Style Drive Style


External Hex	External Octagon

	For Pipe Schedule For Pipe Schedule

	80

	For Use With For Use With

Drinking Water

Water

Wire, Cable, and Cords

	Gender Gender

Male

Female

	Connection Type Connection Type

	Pipe

	System of Measurement System of Measurement

Inch

Metric

	Length Length

	Maximum Temperature Maximum Temperature

100° to 249° F

250° to 499° F

	Minimum Temperature Minimum Temperature

-70° F

32° F

Not Rated

	Specifications Met Specifications Met

ASTM

NSF/ANSI

	Environment Environment

Food and Beverage

	Size Size

	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

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82 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.

Connect these fittings to Schedule 80 pipe–they have thicker, stronger walls than standard-wall fittings so they can handle heavy duty industrial plumbing and water supply applications, such as water processing, waste water treatment, and irrigation. Fittings are plastic for good corrosion resistance. They meet ASTM specifications and testing requirements for material quality.

Fittings for drinking water meet NSF/ANSI Standard 61.

Attach socket-connect ends to unthreaded pipe or another socket-connect fitting with a PVC primer and cement (also known as solvent weld).

To prevent leaks in threaded connections, apply a sealant to the male threads. For plastic threads, apply a non-hardening, plastic-compatible sealant. Tape or sealants with PTFE are not recommended for plastic-to-plastic connections.

Note: For fittings that are not rated for pressure, you can use the pressure rating of the plastic pipe as a reference. Threaded fittings are limited to 50% of the rated pressure of the pipe.

Warning: Never use plastic pipe fittings and pipe with compressed air or gas.

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

Caps, Female Socket Connect

For Use With: Drinking Water, Water
Maximum Temperature: 140° F
Specifications Met: ASTM D1784, NSF/ANSI 61
Pipe Nipples and Pipe: Use Schedule 80 PVC Plastic
Flanges: Use Class 150 PVC Plastic

Pipe Size	Socket Depth	Material	Color		Each
1/4	5/8"	PVC Plastic	Dark Gray	00000000	00000
3/8	3/4"	PVC Plastic	Dark Gray	0000000	0000
1/2	15/16"	PVC Plastic	Dark Gray	0000000	0000
3/4	1"	PVC Plastic	Dark Gray	0000000	0000
1	1 1/8"	PVC Plastic	Dark Gray	0000000	0000
1 1/4	1 9/32"	PVC Plastic	Dark Gray	0000000	0000
1 1/2	1 13/32"	PVC Plastic	Dark Gray	0000000	0000
2	1 1/2"	PVC Plastic	Dark Gray	0000000	00000
2 1/2	1 7/8"	PVC Plastic	Dark Gray	00000000	00000
3	1 31/32"	PVC Plastic	Dark Gray	0000000	00000
4	2 1/2"	PVC Plastic	Dark Gray	0000000	00000
5	2 5/8"	PVC Plastic	Dark Gray	00000000	000000
6	3 1/16"	PVC Plastic	Dark Gray	00000000	00000
8	4 3/8"	PVC Plastic	Dark Gray	00000000	000000
10	5 1/32"	PVC Plastic	Dark Gray	00000000	000000
12	6"	PVC Plastic	Dark Gray	00000000	000000

Caps, Female Threaded Pipe

For Use With: Drinking Water, Water
Maximum Temperature: 140° F
Specifications Met: ASTM D1784, NSF/ANSI 61
Pipe Nipples and Pipe: Use Schedule 80 PVC Plastic
Flanges: Use Class 150 PVC Plastic

NPT Threads
Pipe Size	Material	Color		Each
1/4	PVC Plastic	Dark Gray	0000000	00000
3/8	PVC Plastic	Dark Gray	0000000	0000
1/2	PVC Plastic	Dark Gray	0000000	0000
3/4	PVC Plastic	Dark Gray	0000000	0000
1	PVC Plastic	Dark Gray	0000000	0000
1 1/4	PVC Plastic	Dark Gray	0000000	0000
1 1/2	PVC Plastic	Dark Gray	0000000	0000
2	PVC Plastic	Dark Gray	0000000	00000
2 1/2	PVC Plastic	Dark Gray	0000000	00000
3	PVC Plastic	Dark Gray	0000000	00000
4	PVC Plastic	Dark Gray	0000000	00000
6	PVC Plastic	Dark Gray	0000000	000000

Plugs, Male Socket Connect

For Use With: Drinking Water, Water
Maximum Temperature: 140° F
Specifications Met: ASTM D1784, NSF/ANSI 61
Pipe Nipples and Pipe: Use Schedule 80 PVC Plastic
Flanges: Use Class 150 PVC Plastic

Pipe Size	OD	ID	Wall Thick.	Drive Size	Material	Color		Each
2 1/2	2 7/8"	2.323"	0.276"	3 17/32"	PVC Plastic	Dark Gray	00000000	000000
3	3 1/2"	2.9"	0.3"	4 5/32"	PVC Plastic	Dark Gray	00000000	00000
4	4 1/2"	3.826"	0.337"	5 1/4"	PVC Plastic	Dark Gray	00000000	000000
6	6 5/8"	5.761"	0.432"	7 9/16"	PVC Plastic	Dark Gray	00000000	000000
8	8 5/8"	7.625"	0.5"	9 23/32"	PVC Plastic	Dark Gray	00000000	000000

Plugs with External Hex Drive, Male Socket Connect

For Use With: Drinking Water, Water
Maximum Temperature: 140° F
Specifications Met: ASTM D1784, NSF/ANSI 61
Pipe Nipples and Pipe: Use Schedule 80 PVC Plastic
Flanges: Use Class 150 PVC Plastic

Pipe Size	OD	ID	Wall Thick.	Drive Size	Material	Color		Each
1/2	27/32"	0.546"	0.147"	1"	PVC Plastic	Dark Gray	00000000	00000
3/4	1 3/64"	0.742"	0.154"	1 3/16"	PVC Plastic	Dark Gray	00000000	00000
1	1 5/16"	0.957"	0.179"	1 1/2"	PVC Plastic	Dark Gray	00000000	00000
1 1/4	1 21/32"	1.278"	0.191"	1 13/16"	PVC Plastic	Dark Gray	00000000	00000
1 1/2	1 29/32"	1.5"	0.2"	2 3/32"	PVC Plastic	Dark Gray	00000000	00000
2	2 3/8"	1.939"	0.218"	2 9/16"	PVC Plastic	Dark Gray	00000000	00000

Plugs with External Octagon Drive, Male Threaded Pipe

For Use With: Drinking Water, Water
Maximum Temperature: 140° F
Specifications Met: ASTM D1784, NSF/ANSI 61
Pipe Nipples and Pipe: Use Schedule 80 PVC Plastic
Flanges: Use Class 150 PVC Plastic

NPT Threads
Pipe Size	Drive Size	Material	Color		Each
1/4	11/16"	PVC Plastic	Dark Gray	0000000	00000
3/8	25/32"	PVC Plastic	Dark Gray	0000000	0000
1/2	31/32"	PVC Plastic	Dark Gray	0000000	0000
3/4	1 3/32"	PVC Plastic	Dark Gray	0000000	0000
1	1 9/16"	PVC Plastic	Dark Gray	0000000	0000
1 1/4	1 7/8"	PVC Plastic	Dark Gray	0000000	0000
1 1/2	2 1/16"	PVC Plastic	Dark Gray	0000000	0000
2	2 15/32"	PVC Plastic	Dark Gray	0000000	0000
2 1/2	2 15/16"	PVC Plastic	Dark Gray	0000000	00000
3	3 19/32"	PVC Plastic	Dark Gray	0000000	00000
4	4 9/16"	PVC Plastic	Dark Gray	0000000	00000
6	6 27/32"	PVC Plastic	Dark Gray	0000000	00000

Thick-Wall Plastic Pipe Flanges for Water

For Use With: Drinking Water, Water
Pressure Class: 150
Maximum Temperature: 140° F
Specifications Met: ASTM D1784, NSF/ANSI 61
Pipe Nipples and Pipe: Use Schedule 80 PVC Plastic
Fittings: Use Schedule 80 PVC Plastic

Also known as Pressure Class 150 flanges, these flanges have thick, strong walls to handle heavy duty industrial plumbing and water supply applications, such as water processing, waste water treatment, and irrigation. They meet NSF/ANSI 61 for drinking water. Bolt two same-size flanges together with a gasket (sold separately) to create an access point within a line. All are PVC, which has good corrosion resistance. They meet ASTM D1784 specifications and testing requirements for material quality.

Warning: Never use plastic pipe flanges and pipe with compressed air or gas.

Sealants cannot be sold to Colorado, Connecticut, District of Columbia, Delaware, Illinois, Indiana, Massachusetts, Maryland, Maine, Michigan, New Hampshire, New Jersey, Northern Virginia, New York, Ohio, Pennsylvania, Rhode Island, or Utah due to local VOC (Volatile Organic Compounds) regulations.

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

Fixed Cap Flanges

Front

Back

Cap flanges are also known as blind flanges.

			Bolt Hole
Pipe Size	Flange OD	For Bolt Dia.	Dia.	No.	Bolt Circle Dia.	Material	Color		Each
1/2	3 1/2"	1/2"	5/8"	4	2 3/8"	PVC Plastic	Dark Gray	00000000	000000
3/4	3 7/8"	1/2"	5/8"	4	2 3/4"	PVC Plastic	Dark Gray	00000000	00000
1	4 1/4"	1/2"	5/8"	4	3 1/8"	PVC Plastic	Dark Gray	00000000	00000
1 1/4	4 5/8"	1/2"	5/8"	4	3 1/2"	PVC Plastic	Dark Gray	00000000	00000
1 1/2	5"	1/2"	5/8"	4	3 7/8"	PVC Plastic	Dark Gray	00000000	00000
2	6"	5/8"	3/4"	4	4 3/4"	PVC Plastic	Dark Gray	00000000	00000
2 1/2	7"	5/8"	3/4"	4	5 1/2"	PVC Plastic	Dark Gray	00000000	000000
3	7 1/2"	5/8"	3/4"	4	6"	PVC Plastic	Dark Gray	00000000	000000
4	9"	5/8"	3/4"	8	7 1/2"	PVC Plastic	Dark Gray	00000000	000000
5	10 1/16"	3/4"	7/8"	8	8 1/2"	PVC Plastic	Dark Gray	00000000	000000
6	11"	3/4"	7/8"	8	9 1/2"	PVC Plastic	Dark Gray	00000000	000000
8	13 1/2"	3/4"	7/8"	8	11 3/4"	PVC Plastic	Dark Gray	00000000	000000

Standard-Wall Plastic Pipe Fittings for Water

Connect these fittings to Schedule 40 plastic pipe–they are the industry standard for residential and commercial low-pressure plumbing and water supply applications. They are plastic for good corrosion resistance.

Attach socket-connect ends to unthreaded pipe or another socket-connect fitting with a PVC primer and cement (also known as solvent weld).

Fittings that meet ASTM D1784, ASTM D1785, and ASTM D4066 adhere to specifications and testing requirements for material quality.

Note: For fittings that are not rated for pressure, you can use the pressure rating of the plastic pipe as a reference. Threaded fittings are limited to 50% of the rated pressure of the pipe.

Warning: Never use plastic pipe fittings and pipe with compressed air or gas.

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

Caps, Metric Female Socket Connect

For Use With: Water
Maximum Temperature: 140° F
Specifications Met: ASTM D1784, ASTM D1785
Pipe Nipples and Pipe: Use PVC Plastic

Dark Gray
DIN Size, mm	Socket Depth, mm	Material	Max. Pressure		Each
12	12	PVC Plastic	230 psi @ 72° F	00000000	00000
16	14	PVC Plastic	230 psi @ 72° F	00000000	0000
20	20	PVC Plastic	230 psi @ 72° F	00000000	0000
25	25	PVC Plastic	230 psi @ 72° F	00000000	0000
32	32	PVC Plastic	230 psi @ 72° F	00000000	0000
40	26	PVC Plastic	230 psi @ 72° F	00000000	00000
50	50	PVC Plastic	230 psi @ 72° F	00000000	00000
63	63	PVC Plastic	230 psi @ 72° F	00000000	00000
75	44	PVC Plastic	230 psi @ 72° F	00000000	00000
90	51	PVC Plastic	230 psi @ 72° F	00000000	00000
110	61	PVC Plastic	230 psi @ 72° F	00000000	00000
160	86	PVC Plastic	140 psi @ 72° F	00000000	000000

High-Pressure Barbed Plastic Pipe Fittings for Water

Use these barbed pipe fittings in industrial plumbing, water processing, and water supply applications up to 200 psi. They meet NSF/ANSI Standard 61 for drinking water. Also known as insert fittings, they have a barbed end that slides into semi-flexible plastic pipe and secures with a clamp (sold separately). Since you don't have to wait for cement to dry, they're quicker to install than socket-connect fittings. Fittings are PVC, which has good strength and corrosion resistance. They meet ASTM D1784 specifications and testing requirements for material quality and ASTM D2609 specifications for barb dimensions.

Note: Barbed pipe fittings are measured by pipe size, which is not an actual measured size, but rather an industry designation.

Warning: Never use plastic pipe fittings and pipe with compressed air or gas.

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

Plugs, Male Barbed Pipe

For Use With: Drinking Water, Water
Maximum Temperature: 140° F
Specifications Met: ASTM D1784, ASTM D2609, NSF/ANSI 61
Pipe Nipples and Pipe: Use Semi-Flexible Polyethylene Plastic

Pipe Size	Barb OD	Material	Color	Max. Pressure		Each
1/2	0.65"	PVC Plastic	Dark Gray	200 psi @ 72° F	00000000	00000
3/4	0.85"	PVC Plastic	Dark Gray	200 psi @ 72° F	00000000	0000
1	1.08"	PVC Plastic	Dark Gray	200 psi @ 72° F	00000000	0000
1 1/4	1.41"	PVC Plastic	Dark Gray	200 psi @ 72° F	00000000	0000
1 1/2	1.65"	PVC Plastic	Dark Gray	160 psi @ 72° F	00000000	0000
2	2.11"	PVC Plastic	Dark Gray	160 psi @ 72° F	00000000	00000

Flexible Furniture Grommets

Squeeze this flexible grommet to open the center flap—once wire, cable, and cords pass through, the flap closes tightly for dust and debris protection as well as a finished look. Use this grommet to eliminate cord clutter on desktops, countertops, benchtops, and other work surfaces. Push it into place.

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

Santoprene Rubber
For Hole Dia.	Flange Dia.	Dp. Under Flange	Temp. Range, °F	For Use Outdoors	Color		Each
3"	3 15/32"	5/8"	-70° to 270°	No	Dark Gray	0000000	000000

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How to Identify and Measure Fittings

Thick-Wall Plastic Pipe Fittings for Water

Thick-Wall Plastic Pipe Flanges for Water

Standard-Wall Plastic Pipe Fittings for Water

High-Pressure Barbed Plastic Pipe Fittings for Water

Flexible Furniture Grommets