ASME B16.3 Pipe Plugs | McMaster-Carr

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39 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.

Low-Pressure Iron and Steel Threaded Pipe Fittings

Use these fittings for low-pressure applications in noncorrosive environments.

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

Caps

For Use With: Air, Steam, Oil, Water, Natural Gas
Specifications Met:
NPT: ASME B1.20.1, ASME B16.3
BSPT: DIN EN 10226
Pipe Nipples and Pipe: Use Schedule 40 steel

NPT Female
Pipe Size	Max. Pressure	Max. Steam Pressure	Material		Each
1	150 psi @ 72° F	150 psi @ 350° F	Iron	000000000	00000
1 1/4	150 psi @ 72° F	150 psi @ 350° F	Iron	000000000	0000
1 1/2	150 psi @ 72° F	150 psi @ 350° F	Iron	000000000	0000
2	150 psi @ 72° F	150 psi @ 350° F	Iron	000000000	00000
2 1/2	150 psi @ 72° F	150 psi @ 350° F	Iron	000000000	00000
3	150 psi @ 72° F	150 psi @ 350° F	Iron	000000000	00000
4	150 psi @ 72° F	150 psi @ 350° F	Iron	000000000	00000
6	150 psi @ 72° F	150 psi @ 350° F	Iron	000000000	000000

Low-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

The galvanized finish on these fittings provides fair corrosion resistance. Fittings are for use in low-pressure applications.

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

Caps

For Use With: Air, Steam, Oil, Water, Natural Gas
Pressure Class: 150
Specifications Met:
NPT: ASME B1.20.1, ASME B16.3, ASTM A153, UL Listed
BSPT: ASTM A197, DIN EN 10226
Pipe Nipples and Pipe: Use Schedule 40 steel
Flanges: Use Class 150 galvanized steel

NPT Female
Pipe Size	Max. Pressure	Max. Steam Pressure	Material		Each
1	150 psi @ 72° F	150 psi @ 350° F	Galvanized Iron	00000000	00000
1 1/4	150 psi @ 72° F	150 psi @ 350° F	Galvanized Iron	00000000	00000
1 1/2	150 psi @ 72° F	150 psi @ 350° F	Galvanized Iron	00000000	00000
2	150 psi @ 72° F	150 psi @ 350° F	Galvanized Iron	00000000	00000
2 1/2	150 psi @ 72° F	150 psi @ 350° F	Galvanized Iron	00000000	00000
3	150 psi @ 72° F	150 psi @ 350° F	Galvanized Iron	00000000	00000
4	150 psi @ 72° F	150 psi @ 350° F	Galvanized Iron	00000000	000000
6	150 psi @ 72° F	150 psi @ 350° F	Galvanized Iron	00000000	000000

Medium-Pressure Iron and Steel Threaded Pipe Fittings

With better strength than our low-pressure iron and steel pipe fittings, these can handle medium-pressure applications. They are for use in noncorrosive environments.

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

Caps

For Use With: Air, Steam, Oil, Water, Natural Gas
Pressure Class : 300
Specifications Met: ASTM A197, UL Listed, ASME B16.3, ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 or 600 steel

NPT Female
Pipe Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/4	2,000 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000
3/8	2,000 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1/2	2,000 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
3/4	2,000 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1	2,000 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/4	1,500 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
1 1/2	1,500 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2	1,500 psi @ 72° F	300 psi @ 550° F	Iron	00000000	00000
2 1/2	1,000 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000
3	1,000 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000

Plugs with Hex Drive

For Use With: Air, Steam, Oil, Water, Natural Gas
Pressure Class : 300
Specifications Met: See Table
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 or 600 steel

NPT Male
Pipe Size	Drive Size	Max. Pressure	Max. Steam Pressure	Material	Specifications Met		Each
1/4	1/4"	2,000 psi @ 72° F	300 psi @ 550° F	Steel	ASME B1.20.1, ASME B16.14, ASME B16.3, ASTM A197, UL Listed	0000000	00000
3/8	5/16"	2,000 psi @ 72° F	300 psi @ 550° F	Steel	ASME B1.20.1, ASME B16.14, ASME B16.3, ASTM A197, UL Listed	0000000	000
1/2	3/8"	2,000 psi @ 72° F	300 psi @ 550° F	Steel	ASME B1.20.1, ASME B16.14, ASME B16.3, ASTM A197, UL Listed	0000000	0000
3/4	9/16"	2,000 psi @ 72° F	300 psi @ 550° F	Steel	ASME B1.20.1, ASME B16.14, ASME B16.3, ASTM A197, UL Listed	0000000	0000
1	5/8"	2,000 psi @ 72° F	300 psi @ 550° F	Steel	ASME B1.20.1, ASME B16.14, ASME B16.3, ASTM A197, UL Listed	0000000	0000

Medium-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

A galvanized finish gives these fittings fair corrosion resistance. They have the strength to handle medium-pressure applications.

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

Caps

For Use With: Air, Natural Gas, Steam, Water
Pressure Class : 300
Specifications Met: ASTM A153, ASTM A197, ASME B16.3, ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 steel

NPT Female
Pipe Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/4	2,000 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	000000
3/8	2,000 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	000000	00000
1/2	2,000 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
3/4	2,000 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1	2,000 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1 1/4	1,500 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
1 1/2	1,500 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	00000
2	1,500 psi @ 72° F	300 psi @ 550° F	Galvanized Iron	0000000	000000