Pressure Class 1000 Pipe Fittings

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203 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.

Premium Low-Pressure Stainless Steel Threaded Pipe Fittings with Certification

Unlike other stainless steel fittings, these are made in the U.S.A. for superior quality. As another marker of quality, they come with a certificate with a traceable lot number and test report that guarantees material composition. All fittings except 1/4" and 3/8" plugs and plugs with hex drive adhere to ANSI/MSS SP-114 standards for heat treating, material thickness, and marking. It’s the highest quality standard for Pressure Class 150 low-pressure stainless steel fittings. They also meet either ASTM A351 or A479 requirements for parts that will be used in pressure systems.

These stainless steel fittings are more corrosion resistant than steel fittings, and almost as strong. 304 stainless steel fittings hold up in humid, damp, and washdown environments but will corrode if exposed to salt water or chemicals. 316 stainless steel fittings are the most corrosion resistant. They stand up to wet environments, just like 304 stainless steel fittings, but unlike 304 stainless steel, they will not corrode from salt water, chlorine solutions, and chemicals.

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

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Straight Connectors, Female

Straight Connector

For Use With: Air, Natural Gas, Oil, Steam, Water
Pressure Class: See table
Fabrication: Heat Treated
Specifications Met: See table
Certification: Material Certificate with Traceable Lot Number
Pipe Nipples and Pipe: Use Schedule 40 stainless steel
Flanges: Use Class 150 stainless steel

304 Stainless Steel
Pipe Size	Pressure Class	Max. Pressure	Max. Steam Pressure	Specifications Met		Each
NPT Female
1/4	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASTM A276, ASTM A479	0000000	000000
3/8	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASTM A276, ASTM A479	0000000	00000
1/2	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASTM A276, ASTM A479	0000000	00000
3/4	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASTM A276, ASTM A479	0000000	00000
1	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASTM A276, ASTM A479	0000000	00000
316 Stainless Steel
NPT Female
1/4	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASTM A276, ASTM A479	0000000	00000
3/8	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASTM A276, ASTM A479	0000000	00000
1/2	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASTM A276, ASTM A479	0000000	00000
3/4	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASTM A276, ASTM A479	0000000	00000
1	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASTM A276, ASTM A479	0000000	00000

Straight Adapters, Threaded Female × Butt Weld

Straight Adapter

For Use With: Air, Natural Gas, Oil, Steam, Water
Pressure Class: See table
Fabrication: Heat Treated
Specifications Met: See table
Certification: Material Certificate with Traceable Lot Number
Pipe Nipples and Pipe: Use Schedule 40 stainless steel
Flanges: Use Class 150 stainless steel

304 Stainless Steel
Pipe Size	Pressure Class	Max. Pressure	Max. Steam Pressure	Specifications Met		Each
NPT Female × Butt Weld
1/4	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASTM A276, ASTM A479	0000000	00000
3/8	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASTM A276, ASTM A479	0000000	0000
1/2	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASTM A276, ASTM A479	0000000	00000
3/4	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASTM A276, ASTM A479	0000000	00000
316 Stainless Steel
NPT Female × Butt Weld
1/4	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASTM A276, ASTM A479	0000000	00000
3/8	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASTM A276, ASTM A479	0000000	00000
1/2	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASTM A276, ASTM A479	0000000	00000
3/4	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASTM A276, ASTM A479	0000000	00000

Bushing Straight Reducing Adapters

Bushing Straight Reducing Adapter

For Use With: Air, Natural Gas, Oil, Steam, Water
Pressure Class: 1000
Fabrication: Heat Treated
Specifications Met: ANSI/MSS SP-114, ASTM A276, ASTM A479
Certification: Material Certificate with Traceable Lot Number
Pipe Nipples and Pipe: Use Schedule 40 stainless steel
Flanges: Use Class 150 stainless steel

Pipe Size				316 Stainless Steel
(A)	(B)	Max. Pressure	Max. Steam Pressure		Each
NPT Male × NPT Female
1/4	1/8	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000
3/8	1/4	1,000 psi @ 72° F	650 psi @ 350° F	0000000	0000
1/2	1/4	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000
1/2	3/8	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000
3/4	1/4	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000
3/4	3/8	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000
3/4	1/2	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000
1	1/4	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000
1	1/2	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000
1	3/4	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000
1 1/4	1	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000
1 1/2	3/4	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000
1 1/2	1	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000
2	1	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000
2	1 1/2	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000

Plugs with External Hex Drive

Plug with External Hex Drive

For Use With: Air, Natural Gas, Oil, Steam, Water
Pressure Class: See table
Fabrication: Heat Treated
Specifications Met: See table
Certification: Material Certificate with Traceable Lot Number
Pipe Nipples and Pipe: Use Schedule 40 stainless steel
Flanges: Use Class 150 stainless steel

						316 Stainless Steel
Pipe Size	Drive Size	Pressure Class	Max. Pressure	Max. Steam Pressure	Specifications Met		Each
NPTF Male
1/2	7/8"	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASTM A276, ASTM A479	0000000	000000
3/4	1 1/16"	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASTM A276, ASTM A479	0000000	00000
1	1 5/16"	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASTM A276, ASTM A479	0000000	00000
1 1/4	1 3/4"	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASTM A276, ASTM A479	0000000	00000
1 1/2	2"	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASTM A276, ASTM A479	0000000	00000
2	2 1/2"	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASTM A276, ASTM A479	0000000	00000

Plugs with External Square Drive

Plug with External Square Drive

For Use With: Air, Natural Gas, Oil, Steam, Water
Pressure Class: See table
Fabrication: Heat Treated
Specifications Met: See table
Certification: Material Certificate with Traceable Lot Number
Pipe Nipples and Pipe: Use Schedule 40 stainless steel
Flanges: Use Class 150 stainless steel

					316 Stainless Steel
Pipe Size	Pressure Class	Max. Pressure	Max. Steam Pressure	Specifications Met		Each
NPTF Male
1/2	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASME B16.14, ASTM A479, SAE J405	0000000	000000
3/4	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASME B16.14, ASTM A479, SAE J405	0000000	00000
1	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASME B16.14, ASTM A276, ASTM A479	0000000	00000
1 1/4	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASME B16.14, ASTM A276, ASTM A479	0000000	00000
1 1/2	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASME B16.14, ASTM A276, ASTM A479	0000000	00000
2	1000	1,000 psi @ 72° F	650 psi @ 350° F	ANSI/MSS SP-114, ASME B16.14, ASTM A276, ASTM A479	0000000	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.

Union connectors separate into three pieces so you can access your line without unthreading pipe connections.

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 Connectors, Female

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
Pipe Size	Max. Pressure	Max. Steam Pressure		Each
NPT Female
1/8	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000
1/4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	0000
3/8	1,000 psi @ 72° F	650 psi @ 350° F	00000000	0000
1/2	1,000 psi @ 72° F	650 psi @ 350° F	00000000	0000
3/4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000
1	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000
1 1/4	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000
1 1/2	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000
2	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000
2 1/2	1,000 psi @ 72° F	650 psi @ 350° F	00000000	000000
3	1,000 psi @ 72° F	650 psi @ 350° F	00000000	000000
4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	000000
316 Stainless Steel
NPT Female
1/8	1,000 psi @ 72° F	650 psi @ 350° F	00000000	0000
1/4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	0000
3/8	1,000 psi @ 72° F	650 psi @ 350° F	00000000	0000
1/2	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000
3/4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000
1	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000
1 1/4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000
1 1/2	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000
2	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000
2 1/2	1,000 psi @ 72° F	650 psi @ 350° F	00000000	000000
3	1,000 psi @ 72° F	650 psi @ 350° F	00000000	000000
4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	000000

Union Straight Connectors

Exploded View

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
1/8	1,000 psi @ 72° F	650 psi @ 350° F	0000000	000000	00000000	000000
1/4	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000	00000000	00000
3/8	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000	00000000	00000
1/2	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000	00000000	00000
3/4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
1	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
1 1/4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	000000
1 1/2	1,000 psi @ 72° F	650 psi @ 350° F	00000000	000000	00000000	000000
2	1,000 psi @ 72° F	650 psi @ 350° F	00000000	000000	00000000	000000
2 1/2	1,000 psi @ 72° F	650 psi @ 350° F	00000000	000000	00000000	000000

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
1/8	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
1/4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	0000	00000000	0000
3/8	1,000 psi @ 72° F	650 psi @ 350° F	00000000	0000	00000000	0000
1/2	1,000 psi @ 72° F	650 psi @ 350° F	00000000	0000	00000000	0000
3/4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	0000	00000000	0000
1	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
1 1/4	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000	00000000	00000
1 1/2	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000	00000000	00000
2	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000	00000000	00000
2 1/2	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	000000
3	1,000 psi @ 72° F	650 psi @ 350° F	00000000	000000	00000000	000000
4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	000000	00000000	000000

Straight Reducers

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

Pipe Size				304 Stainless Steel		316 Stainless Steel
(A)	(B)	Max. Pressure	Max. Steam Pressure		Each		Each
NPT Female
1/4	1/8	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
3/8	1/8	1,000 psi @ 72° F	650 psi @ 350° F	00000000	0000	00000000	00000
3/8	1/4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	0000	00000000	00000
1/2	1/8	1,000 psi @ 72° F	650 psi @ 350° F	00000000	0000	00000000	00000
1/2	1/4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	0000	00000000	00000
1/2	3/8	1,000 psi @ 72° F	650 psi @ 350° F	00000000	0000	00000000	00000
3/4	1/8	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	000000	00
3/4	1/4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
3/4	3/8	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
3/4	1/2	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
1	1/8	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	000000	00
1	1/4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
1	3/8	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
1	1/2	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
1	3/4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
1 1/4	1/4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
1 1/4	3/8	1,000 psi @ 72° F	650 psi @ 350° F	000000	00	00000000	00000
1 1/4	1/2	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
1 1/4	3/4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
1 1/4	1	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
1 1/2	1/4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
1 1/2	3/8	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	000000	00
1 1/2	1/2	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
1 1/2	3/4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
1 1/2	1	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
1 1/2	1 1/4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
2	3/8	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
2	1/2	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
2	3/4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
2	1	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
2	1 1/4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
2	1 1/2	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	00000
2 1/2	2	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	000000
3	1	1,000 psi @ 72° F	650 psi @ 350° F	00000000	000000	00000000	000000
3	2	1,000 psi @ 72° F	650 psi @ 350° F	00000000	000000	00000000	000000
4	3	1,000 psi @ 72° F	650 psi @ 350° F	00000000	000000	000000	00

Caps

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
1/8	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000	00000000	00000
1/4	1,000 psi @ 72° F	650 psi @ 350° F	0000000	0000	00000000	0000
3/8	1,000 psi @ 72° F	650 psi @ 350° F	0000000	0000	00000000	0000
1/2	1,000 psi @ 72° F	650 psi @ 350° F	0000000	0000	00000000	0000
3/4	1,000 psi @ 72° F	650 psi @ 350° F	0000000	0000	00000000	00000
1	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000	00000000	00000
1 1/4	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000	00000000	00000
1 1/2	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000	00000000	00000
2	1,000 psi @ 72° F	650 psi @ 350° F	0000000	00000	00000000	00000
2 1/2	1,000 psi @ 72° F	650 psi @ 350° F	00000000	00000	00000000	000000
3	1,000 psi @ 72° F	650 psi @ 350° F	00000000	000000	00000000	000000
4	1,000 psi @ 72° F	650 psi @ 350° F	00000000	000000	000000	00