Union Elbows | McMaster-Carr

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21 Products

About Pipe and Fittings

Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.

Low-Pressure Stainless Steel Threaded Pipe Fittings

Use these fittings in a low-pressure pipe line. 304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.

Female x male 90° elbow adapters are also known as street elbows.

Union 90° Elbow Adapters

For Use With: Air, Natural Gas, Oil, Steam, Water
Pressure Class: 150
Fabrication: Heat Treated
Specifications Met: ASTM A351
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 × NPT Male
1/8	300 psi @ 72° F	150 psi @ 350° F	______	00	4452K371	000000
1/4	300 psi @ 72° F	150 psi @ 350° F	4464K714	000000	4452K372	00000
3/8	300 psi @ 72° F	150 psi @ 350° F	4464K724	00000	4452K373	00000
1/2	300 psi @ 72° F	150 psi @ 350° F	4464K734	00000	4452K374	00000
3/4	300 psi @ 72° F	150 psi @ 350° F	4464K744	00000	4452K375	00000
1	300 psi @ 72° F	150 psi @ 350° F	4464K754	00000	4452K376	00000
1 1/4	300 psi @ 72° F	150 psi @ 350° F	4464K764	000000	4452K377	000000
1 1/2	300 psi @ 72° F	150 psi @ 350° F	4464K774	000000	4452K378	000000
2	300 psi @ 72° F	150 psi @ 350° F	4464K784	000000	4452K379	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.

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

Union 90° Elbow Connectors

Exploded View

For Use With: Air, Steam, Oil, Water, Natural Gas
Pressure Class : 300
Specifications Met: ASTM A197, UL Listed, ASME B16.39, 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
3/8	600 psi @ 72° F	230 psi @ 550° F	Iron	4627K339	0000000
1/2	600 psi @ 72° F	230 psi @ 550° F	Iron	4627K301	00000
3/4	600 psi @ 72° F	230 psi @ 550° F	Iron	4627K302	000000
1	600 psi @ 72° F	230 psi @ 550° F	Iron	4627K341	000000