3/8 Pipe Adapters | McMaster-Carr

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UN/UNF (SAE Straight)

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Acetic Acid (White Vinegar)

Acetic Acid (White Vinegar) (5% Concentration)

Acetic Acid (White Vinegar) (10% Concentration)

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5,832 Products

Fluid Handling

Pipe Fittings

Form threaded, barbed, flanged, and other types of connections between lengths of pipe

1,474 products

Pipe Nipples and Pipe

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

632 products

Pipe Caps

Cover the ends of pipe to keep out dirt and debris

4 products

Tube Fittings

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

1,492 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

8 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 and Fittings

Snap together and position to deliver coolant, oil, water, or air in any direction

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

Facility and Grounds Maintenance

Faucet Aerators

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

2 products

Building and Machinery Hardware

Positioning Arms

Mount and position tools, small electronics, and displays

1 product

Electrical

Conduit Box Connectors

Attach conduit to a knockout in electrical boxes

5 products

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

2 products

Material Handling

Robot Tool Mounts

Attach tools or extensions to robot arms

4 products