NPSM Couplings | McMaster-Carr

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	Type Type

	Connector
	Adapter
	Reducing Adapter

	Material Material

	Conduit Trade Size Conduit Trade Size

	Shape Shape

	Straight

	Thread Type Thread Type	Show

NPSM

	Thread Type Thread Type	Hide

UN/UNF (SAE Straight)

	Pipe Size Pipe Size

	Gender Gender

Female

Male

	Connection Type Connection Type


Pipe	Hose

Tube	Conduit

	Flexibility Flexibility


Flexible	Rigid

	Conduit Type Conduit Type

RMC

IMC

LFMC

	Conduit Connection Type Conduit Connection Type


Threaded	Twist In

	Finish Finish

Galvanized

Zinc Plated

	Thread Size Thread Size

	Connection Style Connection Style

Threaded

Quick Disconnect

Barbed

	Specifications Met Specifications Met

ASME

ASTM

SAE

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

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

RoHS Compliant

RoHS Compliant with
Exemptions

	System of Measurement System of Measurement

Inch

	For Hose ID For Hose ID

	For Use With For Use With

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Length Length

	Maximum Pressure Maximum Pressure

	Maximum Temperature Maximum Temperature

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139 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.

Medium-Pressure Brass and
Bronze Threaded Pipe Fittings

Choose these fittings when you need better strength than our low-pressure brass and bronze pipe fittings.

Metal Barbed Hose Fittings for Air and Water

Metal hose fittings have better durability than plastic barbed hose fittings.

Metal Push-On Barbed Hose Fittings for Air and Water

Fittings are metal for better durability than plastic barbed hose fittings. They have sharper barbs than standard barbed hose fittings to grip push-on hose without the need for clamps or ferrules. The more you pull on the fittings, the tighter the hose will grip.

Tight-Seal Barbed Hose Fittings for Air and Water

Also known as ball-seat hose nipples, these fittings consist of a barbed shaft with a rounded end that sits inside a female threaded nut. When mated with a male threaded fitting, the rounded end presses tightly against the inside of the male threads for a better seal than a single-piece fitting. Once assembled, insert the barbed end into hose and secure with a clamp or a crimp-on hose ferrule.

Threaded Hose Fittings for Hydraulic Fluid

Fittings are threaded on both ends so you can connect them directly to a threaded hose or to pumps, cylinders, and other equipment in your hydraulic system. Use in high-pressure applications up to 6,000 psi

Quick-Disconnect Hose Couplings for Coolant

Couplings consist of a plug and a socket that connect and disconnect quickly. Use them if you need frequent access to a line. They are designed for coolant applications up to 200 psi. Also known as coolant-line mold couplings.

Plastic Barbed Tube Fittings for Air and Water

Barbs grip onto tubing.

Tight-Seal Plastic Barbed
Tube Fittings for Air and Water

Minimize leaks in your line—these fittings have a single barb that creates a smooth clamping surface for extra-tight connections.

Conduit and Fittings

Connectors for Medium-Wall (IMC)
and Thick-Wall (Rigid) Steel Conduit

Join pieces of conduit.

Connectors for Rigid Aluminum Conduit

Join pieces of conduit.

Connectors for Rigid Stainless Steel Conduit

Join pieces of conduit.

Conduit Adapters

Transition between types of conduit.