Steel Pipe Half Couplings

Clear All

	Pipe Size Pipe Size	Show

1/2

	Pipe Size Pipe Size	Hide

	Thread Type Thread Type

NPT

BSPT

	Material Material

	Pressure Class Pressure Class

	For Pipe Material For Pipe Material

Stainless Steel

Steel

Aluminum

	Connection Style Connection Style

Butt Weld

Threaded

Socket Connect

	For Pipe Schedule For Pipe Schedule


40	80

160	XXH

	Maximum Pressure Maximum Pressure

	Length Length

	For Use With For Use With

	Wall Thickness Wall Thickness

	Specifications Met Specifications Met

	Finish Finish

Zinc-Phosphate Coated

Galvanized

	Maximum Steam Pressure Maximum Steam Pressure

	Construction Construction

Seamless

Welded

	Dash Size Dash Size

	Fabrication Fabrication

Heat Treated

Forged

Machined

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

RoHS Compliant

	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

	Weight Weight

0.36 lbs.

	Socket Depth Socket Depth

0.375"

Forward

How can we improve?

14 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 Stainless Steel Threaded Pipe Fittings

Use these fittings in a low-pressure pipe line.

Fittings that meet ANSI/MSS SP-114 adhere to high-quality standards for heat treating, material thickness, and marking. 304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.

Threaded female x butt weld straight adapters are also known as half couplings. Adapters with weld end allow for a permanent connection.

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

Straight Adapters, Threaded Female × Butt Weld

For Use With: Air, Natural Gas, Oil, Steam, Water
Pressure Class: 150
Fabrication: Heat Treated
Specifications Met:
NPT × Butt Weld: ANSI/MSS SP-114, ASTM A351
BSPT × Butt Weld: ANSI/MSS SP-114
Pipe Nipples and Pipe: Use Schedule 40 stainless steel
Flanges: Use Class 150 stainless steel

			304 Stainless Steel		316 Stainless Steel
Pipe Size	Max. Pressure	Max. Steam Pressure		Each		Each
NPT Female × Butt Weld
1/2	300 psi @ 72° F	150 psi @ 350° F	00000000	00000	00000000	00000
BSPT Female × Butt Weld
1/2	300 psi @ 72° F	150 psi @ 350° F	00000000	0000	000000	00

High-Pressure Stainless Steel Threaded Pipe Fittings

Use these heavy duty fittings in high-pressure flow applications.

304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance. Threaded female x butt weld straight adapters are also known as half couplings.

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

Straight Adapters, Threaded Female × Butt Weld

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Pressure Class: 3000
Specifications Met: ASTM A182, ASME B16.11
Pipe Nipples and Pipe: Use Schedule 80 stainless steel

304 Stainless Steel
Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure		Each
NPT Female × Butt Weld
1/2	08	2,500 psi @ 72° F	1,900 psi @ 350° F	000000000	000000
316 Stainless Steel
NPT Female × Butt Weld
1/2	08	3,000 psi @ 72° F	2,800 psi @ 350° F	00000000	00000

Medium-Pressure Stainless Steel Threaded Pipe Fittings

Choose these fittings when you want the same high-quality found in our low-pressure pipe fittings, but need more strength to handle higher pressures.

Fittings that meet ANSI/MSS SP-114 adhere to high-quality standards for heat treating, material thickness, and marking.

304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.

Threaded female x butt weld straight adapters are also known as half couplings.

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

Straight Adapters, Threaded Female x Butt Weld

For Use With: Air, Natural Gas, Oil, Steam, Water
Pressure Class : 1000
Specifications Met: ANSI/MSS SP-114, ASTM A182
Pipe Nipples and Pipe: Use Schedule 40 stainless steel
Flanges: Use Class 150 stainless steel

			304 Stainless Steel		316 Stainless Steel
Pipe Size	Max. Pressure	Max. Steam Pressure		Each		Each
NPT Female × Butt Weld
1/2	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000

High-Pressure Iron and Steel Threaded Pipe Fittings

These fittings can stand up to high-pressure applications. Use them in noncorrosive environments.

Threaded female x butt weld straight adapters are also known as half couplings.

Phosphate-coated and zinc-phosphate-coated fittings offer some corrosion resistance, but aren't intended for corrosive environments.

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

Straight Adapters

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Pressure Class: 3000
Specifications Met: ASME B16.11, ASTM A105, ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 160 steel
Flanges: Use Class 1500 steel

NPT Female × Butt Weld
Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/2	08	3,000 psi @ 72° F	300 psi @ 360° F	Zinc-Phosphate-Coated Steel	0000000	00000

High-Pressure Galvanized Steel Threaded Pipe Fittings

A galvanized finish gives these fittings better corrosion resistance than our plain steel high-pressure fittings. Also known as Pressure Class 3000 fittings, they have excellent strength to handle high-pressure applications.

Threaded female x butt weld straight adapters are also known as half couplings.

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

Straight Adapters

For Use With: Air, Hydraulic Fluid, Natural Gas, Oil, Steam, Water
Pressure Class: 3000
Specifications Met: ASME B1.20.1, ASME B16.11, ASTM A105, ASTM B633
Pipe Nipples and Pipe: Use Schedule 160 steel

NPT Female × Butt Weld
Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure		Each
1/2	08	3,000 psi @ 72° F	300 psi @ 360° F	00000000	00000

Extreme-Pressure Steel Threaded Pipe Fittings

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

Threaded female x butt weld straight adapters are also known as half couplings.

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

Straight Adapters

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 Class 1500 steel

NPT Female × Butt Weld
Pipe Size	Dash Size	Max. Pressure	Max. Steam Pressure	Material		Each
1/2	08	6,000 psi @ 72° F	300 psi @ 360° F	Steel	00000000	00000

High-Pressure Socket-Connect Steel Unthreaded Pipe Fittings

Socket-connect fittings 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 have heavy duty construction that stands up to high-pressure applications. They are for use in noncorrosive environments.

Socket connect x butt weld straight adapters are also known as half couplings.

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

Straight Adapters

For Use With: Air, Steam, Oil, Water, Natural Gas
Pressure Class : 3000
Specifications Met: ASTM A105, ASME B16.11
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 and 600 steel

Socket Connect Female × Butt Weld
Pipe Size	Wall Thick.	Construction	Max. Pressure	Max. Steam Pressure	Material		Each
1/2	0.33"	Seamless	3,000 psi @ 72° F	Not Rated	Steel	000000000	00000

Low-Pressure Aluminum Threaded Pipe Fittings

In addition to being lightweight, these aluminum fittings offer good corrosion resistance. Use them in low-pressure flow applications. To prevent cracking, do not tighten more than a 1/4-turn past hand tight.

Threaded female x butt weld straight adapters are also known as half couplings.

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

Straight Adapters

For Use With: Air, Oil, Water
Specifications Met: ASME B1.20.1, MIL-DTL-52618
Pressure Class: 150
Pipe Nipples and Pipe: Use Schedule 40 aluminum
Flanges: Use Class 125 aluminum

NPT Female × Butt Weld
Pipe Size	Max. Pressure		Each
1/2	150 psi @ 72° F	000000000	00000

High-Pressure Aluminum Threaded Pipe Fittings

Also known as Pressure Class 3000 fittings, these have the highest pressure rating of all the aluminum pipe fittings we offer. They are lightweight with good corrosion resistance.

Threaded female x butt weld straight adapters are also known as half couplings.

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

Straight Adapters

For Use With: Air, Water
Pressure Class : 3000
Specifications Met: Fed. Spec. QQ-A-200/8, ASTM B221, ASME B1.20.1
Pipe Nipples and Pipe: Use Schedule 80 aluminum

NPT Female × Butt Weld
Pipe Size	Max. Pressure		Each
1/2	3,000 psi @ 72° F	0000000	000000

Titanium Threaded Pipe Fittings

Titanium has similar strength to steel, but is approximately 40% lighter. It has better corrosion resistance than most stainless steel alloys and can handle corrosive substances, such as salt water and acids.

Threaded female x butt weld straight adapters are also known as half couplings.

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

Straight Adapters

For Use With: Air, Oil, Salt Water, Water, Natural Gas
Specifications Met: ASME B16.11, ASTM B348

NPT Female × Butt Weld
Pipe Size	Max. Pressure		Each
1/2	3,000 psi @ 72° F	0000000	000000