Welding Connectors | McMaster-Carr

	For Wire Gauge For Wire Gauge

8
7
6
5
4
3
2
1
1/0
2/0
3/0
4/0

	Connection Type Connection Type


Welding	Hose

Pipe

	Type Type

	Gender Gender


Male	Female

	Current Current

	Shape Shape


Straight	45° Elbow

	Wire Connection Type Wire Connection Type


Screw Terminals	Screw-Clamp Terminals

Crimp On	Solder

	For Use With For Use With

	Maximum Temperature Maximum Temperature

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

DFARS Specialty Metals
COTS-Exempt

	For Maximum Cable OD For Maximum Cable OD

0.5"

0.56"

0.63"

	Length Length

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

RoHS Compliant with
Exemptions

RoHS Compliant

	Thread Size Thread Size

	Thread Type Thread Type

	Minimum Temperature Minimum Temperature

	CGA Number CGA Number

020
021
022
023
024
025
026
027
030
031
032
033
034
035
200
300
320
326
330
346
347
350
500
510
520
540
555
580
590
600
660
677
680
695
702
703

	Material Material

Brass

Plastic

Stainless Steel

	Thread Direction Thread Direction

Left Hand

Right Hand

	Connection Style Connection Style

Threaded

Barbed

Quick Disconnect

	Connects To Connects To

	For Minimum Cable OD For Minimum Cable OD

0.2"

0.32"

0.41"

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

REACH Compliant

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174 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.

Welding Cable Connectors

Deliver power to welding cable. These connectors withstand the high temperatures and high current found in welding applications.

Welding Cable Connector Sets

Each set includes one male plug and one female socket that withstands the high temperatures and high current found in welding applications.

Screw-Down Welding Lugs

Tighten the screw with a ¼" hex key wrench for a more secure connection than Hammer-On Welding Lugs.

Welding Lug Covers

Prevent accidental contact with other welding connections.

Solder and Crimp-On Welding Lugs

Solder these lugs in place, or use a crimping block and punch for the most secure connection of any of the welding lugs we offer.

Hammer-On Welding Lugs

Slide these lugs onto cable and strike them with your hammer to create a durable connection.

Grounding Clamps for Welding

Designed specifically for use with welding circuits.

Compressed Gas Hose Fittings

Nuts for Barbed Hose Fittings for Compressed Gas

Also known as CGA nuts, these are designed for low-pressure welding applications downstream of your pressure regulator. Attach them to barbed hose fittings for compressed gas to make a threaded connection to torches or pressure regulators.

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.

Barbed Hose Fittings for Compressed Gas

Commonly used in low-pressure welding applications, these fittings connect downstream of your pressure regulator. Slide the barbed end into hose and secure with a crimp-on hose ferrule.

Threaded Hose Fittings for Compressed Gas

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

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-Torch
Adapters for Compressed Gas

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

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.

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.

High-Pressure Nipples for Compressed Gas

Commonly used in high-pressure welding applications, these nipples connect your tank to the inlet of a pressure regulator. One side has a threaded pipe end and the other side has a rounded end that sits inside a threaded nut to make a threaded connection.

High-Pressure Threaded Fittings for Compressed Gas

Designed to handle high-pressure welding applications, these CGA fittings are commonly used to connect pressure regulators to compressed gas tanks or cylinders.