9/16"-18 Nipples | McMaster-Carr

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	Type Type


Adapter	Connector

Nut

	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size	Show

9/16"-18

	Thread Size Thread Size	Hide

	Thread Type Thread Type

UN/UNF (SAE Straight)

UNJ/UNJF (JIC)

	Pipe Size Pipe Size

	For Use With For Use With

	Connection Style Connection Style

	Material Material

	Shape Shape

	Straight

	Gender Gender

Male

Female

	Thread Direction Thread Direction

Right Hand

Left Hand

	CGA Number CGA Number

020
021
022
023
032
170
510
600

	Connects To Connects To

	Connection Type Connection Type


Pipe	Hose

Tube

	For Hose ID For Hose ID

	Dash Size Dash Size

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

DFARS Specialty Metals
COTS-Exempt

	Length Length

	Trade Size Trade Size

	Maximum Pressure Maximum Pressure

	For Tube OD For Tube OD

1/4"

3/8"

10mm

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

RoHS Compliant

RoHS Compliant with
Exemptions

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

REACH Compliant

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107 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.

Extreme-Pressure Stainless
Steel Threaded Pipe Fittings

Use these fittings in extreme-pressure conditions up to 15,000 psi.

Miniature Medium-Pressure Stainless
Steel Threaded Pipe Fittings

When space is at a premium choose these compact fittings.

Compact Extreme-Pressure
Steel Threaded Pipe Fittings

These fittings are strong enough to handle extreme pressures, yet small enough to fit into cramped spaces.

Miniature Medium-Pressure
Aluminum Threaded Pipe Fittings

Their small size makes these miniature fittings a good choice for cramped, confined spaces.

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.

Nuts for High-Pressure Nipples for Compressed Gas

These nuts attach to high-pressure nipples for compressed gas so you can connect your tank to the inlet of a pressure regulator.

Threaded Hose Fittings for Compressed Gas

Use these CGA fittings to connect welding hose to pressure regulators and torches.

Threaded Hose-to-Propane-Torch
Adapters for Compressed Gas

These CGA adapters allow you to connect a hose to a propane torch.

Hose Crimping Tool and Fitting
Sets for Compressed Gas

Sets contain a crimping tool and a variety of CGA fittings, nuts, and ferrules so you can connect pressure regulators, torches, and other components of your welding system.

Threaded Hose-to-Propane-Tank
Adapters for Compressed Gas

These CGA adapters have a male threaded end that connects to a propane tank and a male threaded end that connects to welding hose.

Quick-Disconnect Hose Couplings for Compressed Gas

These couplings consist of a plug and socket that connect and disconnect quickly. Use them if you need to frequently link and unlink welding hoses, torches, and regulators. They are also known as CGA couplings.

Push-On Barbed Hose Fittings for Hydraulic Fluid

Fittings have sharp barbs that grip push-on hose with no clamps or ferrules required. The more you pull on the fittings, the tighter the hose will grip. Use in low-pressure hydraulic applications up to 350 psi.

Tube Fittings for Metal Tubing

37° Flared Fittings for Copper Tubing

Also known as JIC (Joint Industrial Council) fittings, these connect to tubing that is flared to 37°. They can handle higher pressures than 45° flared fittings.

37° Flared Fittings for Stainless Steel Tubing

Also known as JIC (Joint Industrial Council) fittings, these provide a tight metal-to-metal seal on stainless steel tubing that is flared to 37°.

Cleaned and Bagged 37° Flared
Fittings for Stainless Steel Tubing

Individually bagged to prevent contamination, these fittings are suitable for applications that require a high level of cleanliness.

Precision AN 37° Flared Fittings
for Stainless Steel Tubing

The threads on the tube end of these fittings are Class 3A or 3B and adhere to tighter tolerances than other 37° flared fittings.

Vibration-Resistant Precision AN 37°
Flared Fittings for Stainless Steel Tubing

A PTFE seal on the tube end of these fittings allows for an extra-strong connection in high-vibration applications.

37° Flared Fittings for Steel Tubing

Also known as JIC (Joint Industrial Council) fittings, these provide a tight metal-to-metal seal on steel tubing that is flared to 37°.

37° Flared Fittings for Aluminum Tubing

Also known as JIC (Joint Industrial Council) fittings, these provide a tight seal on tubing that is flared to 37°.