Pipe Caps For XXH Pipe Schedule

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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.

Extreme-Pressure Steel Threaded Pipe Fittings

The strongest steel fittings we offer, these can withstand extreme-pressure applications.

Galvanized and zinc-plated steel fittings have better corrosion resistance than plain steel fittings. PTFE-coated steel fittings have better corrosion resistance than galvanized and zinc-plated steel fittings.

Plugs with a round body or a hex body are solid and have a tall head. They’re also known as refinery plugs.

Plugs with a 7/8" taper sit flush to the surface for a low profile.

NPTF (Dryseal) threads are compatible with NPT threads. UN/UNF (SAE Straight) male threads have a gasket to protect against leaks. They are also known as O-ring boss threads.

Note: The maximum pressure listed for Class 6000 fittings is for conditions where there are no sudden changes in pressure or velocity. Please refer to ASME B16.11 to determine the specific maximum operating pressure for your application.

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

Caps

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Pressure Class: 6000
Specifications Met: ASME B1.20.1, ASME B16.11, ASTM A105
Pipe Nipples and Pipe: Use XXH steel
Flanges: Use Class 1500 steel

NPT Female
Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/4	04	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	000000
3/8	06	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000
1/2	08	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000
3/4	12	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000
1	16	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000
1 1/4	20	6,000 psi @ 72° F	300 psi @ 360° F	Steel	000000000	00000
1 1/2	24	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000
2	32	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000

Plugs with Round Body

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Pressure Class: 6000
Specifications Met: ASME B1.20.1, ASME B16.11, ASTM A105
Pipe Nipples and Pipe: Use Schedule XXH steel
Flanges: Use steel

NPT Male
Pipe Size	Max. Pressure	Material		Each
1/4	6,000 psi @ 72° F	Steel	0000000	000000
3/8	6,000 psi @ 72° F	Steel	0000000	00000
1/2	6,000 psi @ 72° F	Steel	0000000	00000
3/4	6,000 psi @ 72° F	Steel	0000000	00000
1	6,000 psi @ 72° F	Steel	0000000	00000
1 1/4	6,000 psi @ 72° F	Steel	0000000	00000
1 1/2	6,000 psi @ 72° F	Steel	0000000	00000
2	6,000 psi @ 72° F	Steel	0000000	00000

Plugs with Hex Drive

UN/UNF
(SAE Straight) Male
Threads with Gasket

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Temperature Range:
Buna-N Rubber: -20° to 200° F
Fluoroelastomer Rubber: -4° to 400° F
Specifications Met: ASTM B633, SAE J1926
Pipe Nipples and Pipe: Use Schedule XXH steel
Flanges: Use Class 1500 steel

					Buna-N Rubber Gasket		Fluoroelastomer Rubber Gasket
Thread Size	Dash Size	Drive Size	Max. Pressure	Material		Each		Each
UN/UNF (SAE Straight) Male
5/16"-24	02	1/8"	5,500 psi @ 72° F	Zinc-Plated Steel	0000000	00000	0000000	00000
7/16"-20	04	3/16"	5,000 psi @ 72° F	Zinc-Plated Steel	0000000	0000	0000000	0000
9/16"-18	06	1/4"	4,000 psi @ 72° F	Zinc-Plated Steel	0000000	0000	0000000	0000
3/4"-16	08	5/16"	3,500 psi @ 72° F	Zinc-Plated Steel	0000000	0000	0000000	0000
7/8"-14	10	3/8"	2,700 psi @ 72° F	Zinc-Plated Steel	0000000	0000	0000000	0000
1 1/16"-12	12	9/16"	2,200 psi @ 72° F	Zinc-Plated Steel	0000000	0000	0000000	0000
1 5/16"-12	16	5/8"	2,000 psi @ 72° F	Zinc-Plated Steel	0000000	00000	0000000	00000
1 5/8"-12	20	3/4"	1,600 psi @ 72° F	Zinc-Plated Steel	0000000	00000	0000000	00000
1 7/8"-12	24	3/4"	1,200 psi @ 72° F	Zinc-Plated Steel	0000000	00000	0000000	00000

Plugs with Hex Drive and 7/8" Taper

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Temperature Range: -100° to 450° F
Specifications Met: ASTM A574, ASME B1.20.3
Pipe Nipples and Pipe: Use Schedule XXH steel
Flanges: Use Class 1500 steel

			Steel		PTFE-Coated Steel
Pipe Size	Dash Size	Max. Pressure		Each	Color		Each
NPTF Male
1/16	__	5,000 psi @ 72° F	0000000	00000	Blue	0000000	00000
1/8	02	5,000 psi @ 72° F	0000000	000	Blue	0000000	0000
1/4	04	5,000 psi @ 72° F	0000000	000	Blue	0000000	0000
3/8	06	5,000 psi @ 72° F	0000000	0000	Blue	0000000	0000
1/2	08	5,000 psi @ 72° F	0000000	0000	Blue	0000000	0000
3/4	12	5,000 psi @ 72° F	0000000	0000	Blue	0000000	0000
1	16	5,000 psi @ 72° F	0000000	00000	__	000000	00
1 1/4	20	5,000 psi @ 72° F	0000000	00000	__	000000	00

Plugs with External Hex Drive and Hex Body

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Pressure Class: 6000
Specifications Met: ASME B1.20.1, ASME B16.11, ASTM A105
Pipe Nipples and Pipe: Use Schedule XXH steel
Flanges: Use steel

NPT Male
Pipe Size	Drive Size	Max. Pressure	Material		Each
1/4	5/8"	6,000 psi @ 72° F	Steel	0000000	000000
3/8	7/8"	6,000 psi @ 72° F	Steel	0000000	00000
1/2	7/8"	6,000 psi @ 72° F	Steel	0000000	00000
3/4	1 1/16"	6,000 psi @ 72° F	Steel	0000000	00000
1	1 3/8"	6,000 psi @ 72° F	Steel	0000000	00000
1 1/4	1 3/4"	6,000 psi @ 72° F	Steel	0000000	00000
1 1/2	2"	6,000 psi @ 72° F	Steel	0000000	00000
2	2 1/2"	6,000 psi @ 72° F	Steel	0000000	000000

Extreme-Pressure Socket-Connect Steel Unthreaded Pipe Fittings

Also known as Pressure Class 6000 fittings, these heavy duty forged fittings are the strongest steel fittings we offer. They are easier to weld than butt-weld fittings because the fitting doesn’t need to align perfectly to the pipe. Slide pipe into the socket and weld for a strong, permanent connection. Fittings are for use in noncorrosive environments.

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

Caps

For Use With: Air, Water, Oil, Natural Gas, Steam, Hydraulic Fluid
Pressure Class : 6000
Specifications Met: ASME B16.11, ASTM A105
Pipe Nipples and Pipe: Use Schedule XXH steel
Flanges: Use Class 1500 steel

Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure		Each
1/2	08	6,000 psi @ 72° F	300 psi @ 360° F	000000000	000000
3/4	12	6,000 psi @ 72° F	300 psi @ 360° F	000000000	00000
1	16	6,000 psi @ 72° F	300 psi @ 360° F	000000000	00000
1 1/4	20	6,000 psi @ 72° F	300 psi @ 360° F	000000000	00000
1 1/2	24	6,000 psi @ 72° F	300 psi @ 360° F	000000000	00000
2	32	6,000 psi @ 72° F	300 psi @ 360° F	000000000	00000