Black Iron Pipe Fitting Plugs

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51 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
Pressure Class: 150
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	Black-Coated Iron	000000000	00000
1 1/4	150 psi @ 72° F	150 psi @ 350° F	Black-Coated Iron	000000000	0000
1 1/2	150 psi @ 72° F	150 psi @ 350° F	Black-Coated Iron	000000000	00000
2	150 psi @ 72° F	150 psi @ 350° F	Black-Coated Iron	000000000	00000
2 1/2	150 psi @ 72° F	150 psi @ 350° F	Black-Coated Iron	000000000	00000
3	150 psi @ 72° F	150 psi @ 350° F	Black-Coated Iron	000000000	00000
4	150 psi @ 72° F	150 psi @ 350° F	Black-Coated Iron	000000000	00000
6	150 psi @ 72° F	150 psi @ 350° F	Black-Coated Iron	000000000	000000
BSPT Female
1/4	150 psi @ 72° F	150 psi @ 360° F	Black-Coated Iron	00000000	0000
3/8	150 psi @ 72° F	150 psi @ 360° F	Black-Coated Iron	00000000	0000
1/2	150 psi @ 72° F	150 psi @ 360° F	Black-Coated Iron	00000000	0000
3/4	150 psi @ 72° F	150 psi @ 360° F	Black-Coated Iron	00000000	0000
1	150 psi @ 72° F	150 psi @ 360° F	Black-Coated Iron	00000000	0000
1 1/4	150 psi @ 72° F	150 psi @ 360° F	Black-Coated Iron	00000000	0000
1 1/2	150 psi @ 72° F	150 psi @ 360° F	Black-Coated Iron	00000000	0000
2	150 psi @ 72° F	150 psi @ 360° F	Black-Coated Iron	00000000	00000
2 1/2	150 psi @ 72° F	150 psi @ 360° F	Black-Coated Iron	0000000	00000

Plugs with Square Drive

For Use With: Air, Steam, Oil, Water, Natural Gas
Presure Class:
Steel: 150
Iron: 125
Pipe Nipples and Pipe: Use Schedule 40 steel

NPT Male
Pipe Size	Plug Construction	Max. Pressure	Max. Steam Pressure	Material		Each
2 1/2	Hollow	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	000000000	000000
3	Hollow	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	000000000	00000
3 1/2	Hollow	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	000000000	00000
4	Hollow	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	000000000	000000

Plugs with External Square Drive

For Use With:
NPT and BSPT: Air, Natural Gas, Oil, Steam, Water
NPTF: Air, Natural Gas, Steam, Water
Pressure Class:
NPT Iron: 125
BSPT Iron: 150
Specifications Met:
See table
Pipe Nipples and Pipe:
NPT and BPST: Use Schedule 40 steel

NPT Male
Pipe Size	Plug Construction	Max. Pressure	Max. Steam Pressure	Material	Specifications Met		Each
2 1/2	Hollow	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	__	000000000	000000
3	Hollow	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	__	000000000	00000
3 1/2	Hollow	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	__	000000000	00000
4	Hollow	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	__	000000000	00000
BSPT Male
1/4	Hollow	150 psi @ 72° F	150 psi @ 360° F	Black-Coated Iron	DIN EN 10226	00000000	0000
3/8	Hollow	150 psi @ 72° F	150 psi @ 360° F	Black-Coated Iron	DIN EN 10226	00000000	0000
1/2	Hollow	150 psi @ 72° F	150 psi @ 360° F	Black-Coated Iron	DIN EN 10226	00000000	0000
3/4	Hollow	150 psi @ 72° F	150 psi @ 360° F	Black-Coated Iron	DIN EN 10226	00000000	0000
1	Hollow	150 psi @ 72° F	150 psi @ 360° F	Black-Coated Iron	DIN EN 10226	00000000	0000
1 1/4	Hollow	150 psi @ 72° F	150 psi @ 360° F	Black-Coated Iron	DIN EN 10226	00000000	0000
1 1/2	Hollow	150 psi @ 72° F	150 psi @ 360° F	Black-Coated Iron	DIN EN 10226	00000000	0000
2	Hollow	150 psi @ 72° F	150 psi @ 360° F	Black-Coated Iron	DIN EN 10226	00000000	00000
2 1/2	Hollow	150 psi @ 72° F	150 psi @ 360° F	Black-Coated Iron	DIN EN 10226	0000000	00000

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	00000
3	1,000 psi @ 72° F	300 psi @ 550° F	Iron	00000000	000000

Plugs with External Square 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 steel

NPT Male
Pipe Size	Plug Construction	Max. Pressure	Max. Steam Pressure	Material	Specifications Met		Each
1/2	Solid	400 psi @ 72° F	300 psi @ 550° F	Iron	ASME B1.20.1, ASME B16.14, ASTM A126, UL Listed	00000000	00000
3/4	Solid	400 psi @ 72° F	300 psi @ 550° F	Iron	ASME B1.20.1, ASME B16.14, ASTM A126, UL Listed	00000000	0000
1	Solid	400 psi @ 72° F	300 psi @ 550° F	Iron	ASME B1.20.1, ASME B16.14, ASTM A126, UL Listed	00000000	0000
1 1/4	Solid	400 psi @ 72° F	300 psi @ 550° F	Iron	ASME B1.20.1, ASME B16.14, ASTM A126, UL Listed	00000000	00000
1 1/2	Solid	400 psi @ 72° F	300 psi @ 550° F	Iron	ASME B1.20.1, ASME B16.14, ASTM A126, UL Listed	00000000	00000
2	Solid	400 psi @ 72° F	300 psi @ 550° F	Iron	ASME B1.20.1, ASME B16.14, ASTM A126, UL Listed	00000000	00000
2 1/2	Solid	400 psi @ 72° F	300 psi @ 550° F	Iron	ASME B1.20.1, ASME B16.14, ASTM A126, UL Listed	00000000	00000