3/8 Pipe Adapters | McMaster-Carr

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Fitting Connection

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6,028 Products

Fluid Handling

Pipe and Pipe Fittings

Generally thicker and more rigid than tubing for distributing liquids and gases through your facility

2,292 products

Tube Fittings

Make threaded, push to connect, barbed, and other types of connections between lengths of tube

1,491 products

Hose Fittings

Create threaded, barbed, quick-disconnect, and other types of connections between lengths of hose

677 products

Hose Nozzle Swivels

Rotate to prevent hose from kinking, twisting, and wearing

1 product

Manifolds

Distribute air or fluid to multiple places from a single source; also called headers

308 products

Junction Blocks

Organize and separate multiple lines in a pipe system; air and fluid flow through the threaded holes

18 products

Orifice Valves

Restrict the flow of liquids and gases to precisely control rate and pressure

104 products

On-Off Valves

Start and stop flow through a line

179 products

Pressure Test Fittings

Create a temporary connection point for gauges and other testing equipment

4 products

Fastening and Joining

Thread Adapters

Join threads of a different type, size, and gender

14 products

Lubricating

Grease Fitting Adapters

Mate grease fittings when the sizes and thread types don't match

2 products

Coolant Dispenser Hose Connectors

Join lengths of coolant hose to components, supply lines, and each other

2 products

Fabricating and Machining

Pipe Threader Die Head Wrenches

Pair with a Ridgid die head and dies to cut pipe and conduit threads

5 products

Pipe Threaders

Cut external threads in pipe and conduit with ratcheting action or electric power

26 products

Pipe Threader Dies

Install in the die head on your Ridgid pipe threader to cut external pipe and conduit threads

7 products

Pipe Threader Die Heads

Attach to your Ridgid ratcheting or electric threader to cut external pipe and conduit threads

3 products

Measuring and Inspecting

Test Lead Clips

For hands-free testing, create a temporary yet secure electrical connection

1 product

Building and Machinery Hardware

Positioning Arms

Mount and position tools, small electronics, and displays

1 product

Material Handling

Robot Tool Mounts

Attach tools to robot arms

1 product

Power Transmission

Air Cylinders

Push and pull loads to do everything from stamping materials to sorting parts on conveyors

310 products

Air to Hydraulic Power Units

Power a hydraulic cylinder with air to avoid the setup, cost, and mess of hydraulic fluid

4 products

Compressed Air Regulator Manifolds

Use a single air supply to meet multiple pressure requirements

18 products

Compressed Air Filter/Regulator/Lubricator Manifolds

Distribute compressed air to multiple locations from a single source

1 product

Electrical

Conduit and Conduit Fittings

Protect wiring from impact and the environment in runs indoors, outdoors, and underground

5 products

Facility and Grounds Maintenance

Faucet Aerators

Reduce water use and noise while creating a smooth, powerful spray

2 products