Description

Description

Stainless Steel 150# NPT Full Coupling

Stainless Steel 150# NPT Full Couplings provide a threaded connection for joining two compatible male NPT pipe, nipple, or fitting connections. Available in 304 and 316 stainless steel, these full couplings are offered in standard and H-series configurations across a broad range of nominal pipe sizes.

Available sizes range from 1/8" through 4". Select the required nominal pipe size, stainless steel grade, and coupling series for your piping application.

Product Highlights

Full threaded pipe coupling
Available in 304 or 316 stainless steel
150 lb pressure class
Female NPT threaded connections
Designed to join two compatible male NPT connections
Standard and H-series options available
Corrosion-resistant stainless steel construction
Nominal sizes available from 1/8" through 4"
Manufactured by Service Metal

Technical Specifications

Manufacturer	Service Metal
Product Type	Full Coupling
Material Options	304 Stainless Steel or 316 Stainless Steel
Pressure Class	150 lb
Connection Type	Female NPT x Female NPT
Configuration Options	Standard Series and H Series
Available Sizes	1/8" through 4", depending on selected material and series
304 SS Series	SSP4CPL and SSP4CPLH
316 SS Series	SSP6CPL and SSP6CPLH

Choose 304 or 316 Stainless Steel

304 Stainless Steel

The SSP4CPL and SSP4CPLH series provide 304 stainless steel full couplings for threaded piping applications requiring this stainless steel grade.

316 Stainless Steel

The SSP6CPL and SSP6CPLH series provide 316 stainless steel full couplings. Select the 316 stainless steel option when this material grade is specified for the piping system or application.

Full Coupling Connection

Female NPT x Female NPT

Female NPT threaded connections
Connects two compatible male NPT components
Suitable for threaded pipe and nipple connections
No welding required for threaded assembly
Provides an inline threaded connection

Threaded Piping Applications

Useful for joining threaded pipe sections
Compatible with corresponding male NPT components
Available in multiple nominal pipe sizes
304 and 316 stainless steel options
Standard and H-series configurations

Series & Material Options

Standard Series

The standard full-coupling variants use the SSP4CPL series for 304 stainless steel and the SSP6CPL series for 316 stainless steel.

H Series

The H-series full-coupling variants use the SSP4CPLH series for 304 stainless steel and the SSP6CPLH series for 316 stainless steel. Select the exact series required by your piping specification.

Available Sizes

SSP4CPL — 304 Stainless Steel, Standard Series

1/8", 1/4", 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3" and 4"

SSP4CPLH — 304 Stainless Steel, H Series

1/8", 1/4", 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3" and 4"

SSP6CPL — 316 Stainless Steel, Standard Series

1/8", 1/4", 3/8", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3" and 4"

SSP6CPLH — 316 Stainless Steel, H Series

1/8", 1/4", 1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 3" and 4"

Performance Features

150 lb Class

These full couplings are identified as 150 lb class stainless steel threaded fittings.

NPT Threaded

Female NPT connections allow the coupling to join compatible male threaded piping components.

Multiple Configurations

Choose the required stainless steel grade, nominal pipe size, and standard or H-series configuration.

Common Applications

Industrial & Process Piping

Industrial piping systems
Process piping
Utility piping
Equipment connections
Maintenance and repair installations
Threaded pipe extensions

Commercial & Mechanical Piping

Commercial mechanical systems
Stainless steel piping assemblies
Equipment rooms
General threaded piping
Inline pipe connections
Applications requiring stainless steel fittings

Selecting the Correct Full Coupling

Confirm the required nominal pipe size, stainless steel grade, and coupling series before ordering. SSP4-series couplings are 304 stainless steel, while SSP6-series couplings are 316 stainless steel.

The standard variants use the SSP4CPL and SSP6CPL series, while the H-series variants use SSP4CPLH and SSP6CPLH. Select the exact configuration specified for your application.

Ask Willy: Need Pipe Size Help?

Use our common pipe diameters and wall thickness chart to confirm sizing before ordering 150# stainless steel threaded full couplings. You can also review the product specification sheet and Certificate of Conformance below.

View Pipe Size Chart PDF Spec Sheet PDF Certificate of Conformance PDF

Product Documentation

Product Specification Sheet

Review the specification sheet for dimensional and product-specific information on the 150# stainless steel threaded full coupling.

Pipe Size Chart

Use the common pipe diameters and wall thickness chart to help confirm compatible pipe sizing before ordering.

Certificate of Conformance

Certificate of Conformance documentation is available through the linked PDF.

Installation & Selection Guidance

Confirm the required nominal pipe size before ordering.
Select either 304 or 316 stainless steel according to the piping specification.
Confirm whether the standard or H-series coupling is required.
Verify that female NPT x female NPT connections are required.
Verify stainless steel compatibility with the intended service.
Use thread sealant suitable for the piping material and conveyed media.
Avoid cross-threading during assembly.
Use appropriate installation practices for stainless steel threaded components.
Do not over-tighten threaded fittings.
Confirm pressure and temperature requirements for the complete piping system.
Inspect completed connections for leakage before placing the system into service.
Follow applicable piping codes and project specifications.

Need Help Selecting Stainless Steel Fittings?

Our industrial PVF specialists can help review your pipe size, stainless steel grade, connection requirements, and application before you order.

Email the GetPipe.com Team Visit Quick Support

Frequently Asked Questions

What is a full coupling used for?

A full coupling is used to join two compatible male NPT threaded pipe, nipple, fitting, or equipment connections in line.

Are these available in both 304 and 316 stainless steel?

Yes. This listing includes both 304 and 316 stainless steel full couplings.

What is the difference between SSP4CPL and SSP6CPL?

The SSP4CPL series is 304 stainless steel, while the SSP6CPL series is 316 stainless steel.

What are the H-series SKUs?

The H-series variants are identified by SSP4CPLH for 304 stainless steel and SSP6CPLH for 316 stainless steel. Select the series specified for your application.

What connection type do these couplings use?

These full couplings use female NPT threaded connections.

What pressure class are these couplings?

These stainless steel threaded full couplings are identified as 150 lb class fittings.

What sizes are available?

The product family includes nominal sizes from 1/8" through 4". Availability varies by stainless steel grade and coupling series.

How do I select the correct variant?

Confirm the nominal pipe size, select either 304 or 316 stainless steel, and then select the standard or H-series configuration required by your piping specification.

Important Ordering Notes

This listing includes 304 and 316 stainless steel full couplings.
SSP4CPL-series SKUs are 304 stainless steel standard-series couplings.
SSP4CPLH-series SKUs are 304 stainless steel H-series couplings.
SSP6CPL-series SKUs are 316 stainless steel standard-series couplings.
SSP6CPLH-series SKUs are 316 stainless steel H-series couplings.
Fittings are 150 lb class.
Connections are female NPT threaded.
Nominal sizes range from 1/8" through 4", depending on series.
Select the correct nominal pipe size, stainless steel grade, and series before ordering.
Verify material compatibility with the intended application.
Confirm system pressure, temperature, and material requirements before installation.
Product dimensions and weight vary by selected size and series.