MSS SP-79 Pipe Fittings | McMaster-Carr

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Maximum Pressure @ Temperature

3,000 psi @ 72° F

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EAR99

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12 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.

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.

Bushing Straight Reducing Adapters

For Use With: Air, Steam, Oil, Water, Natural Gas
Pressure Class : 3000
Specifications Met: ASTM A105, MSS SP-79
Pipe Nipples and Pipe: Use Schedule 80 steel
Flanges: Use Class 300 and 600 steel

Pipe Size
(A)	(B)	Max. Pressure	Max. Steam Pressure	Material		Each
Socket Connect Male × Socket Connect Female
1/4	1/8	3,000 psi @ 72° F	Not Rated	Steel	45005K271	000000
1/2	1/4	3,000 psi @ 72° F	Not Rated	Steel	45005K273	0000
1/2	3/8	3,000 psi @ 72° F	Not Rated	Steel	45005K272	0000
3/4	1/4	3,000 psi @ 72° F	Not Rated	Steel	45005K276	0000
3/4	3/8	3,000 psi @ 72° F	Not Rated	Steel	45005K275	0000
3/4	1/2	3,000 psi @ 72° F	Not Rated	Steel	45005K274	0000
1	1/2	3,000 psi @ 72° F	Not Rated	Steel	45005K278	0000
1	3/4	3,000 psi @ 72° F	Not Rated	Steel	45005K277	0000
1 1/4	1	3,000 psi @ 72° F	Not Rated	Steel	45005K279	0000
1 1/2	1 1/4	3,000 psi @ 72° F	Not Rated	Steel	45005K281	00000
2	1	3,000 psi @ 72° F	Not Rated	Steel	45005K283	00000
2	1 1/2	3,000 psi @ 72° F	Not Rated	Steel	45005K282	00000