Brass Couplings | McMaster-Carr

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Compliant with Exemptions

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DFARS Specialty Metals

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15,868 Products

Fluid Handling

Pipe and Pipe Fittings

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

3,275 products

Hose Fittings

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

1,953 products

Hose Fitting Nuts

Connect fittings and compressed-gas nipples to pressure regulators and torches

55 products

Hose End Caps

Cover the ends of hose to keep out dirt and debris

38 products

Tube and Tube Fittings

Typically more flexible than pipe for carrying liquids and gases in short runs around equipment

6,166 products

Air Chucks

Connect air hose to Schrader valves, which are common on tires and hydraulic systems

5 products

On-Off Valves

Start and stop flow through a line

1,632 products

Orifice Valves

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

321 products

Float Valve Bodies

Pair with floats and rods to create float valves that meet your needs

59 products

Fastening and Joining

Coupling Nuts

Connect and extend threaded rods

43 products

Thread Adapters

Join threads of a different type, size, and gender

23 products

Standoffs

Separate, position, or connect components in assemblies

550 products

Brazing Rings

Snap into unthreaded pipe fittings for an extra-strong, leak-resistant connection

5 products

Power Transmission

Precision Lead Screw Nuts

Pair with precision lead screws for accurate starts and stops in your assembly

194 products

Lead Screw Nuts

Mate with lead screws to move components in a straight line

128 products

Rod Alignment Couplers

Reduce wear on bearings and seals by flexing when the cylinder and load aren't precisely even

4 products

Rod Ends

Use with connecting rods to support loads and control steering, tensioning, or pivoting motion

133 products

Shaft Collars

Hold and position parts on a shaft, or limit shaft movement

12 products

Flexible Shafts

Snake around curves and obstructions to transmit rotary motion along any path

10 products

Lubricating

Grease Fitting Adapters

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

12 products

Grease Gun Tips

Attach to grease gun nozzles and direct a stream of lubricant into grease fittings on machinery

36 products

Grease Gun Tip Adapters

Quickly switch between standard, button-head, and flush-style grease fittings

4 products

Grease Gun Nozzles

Replace nozzles on grease guns

55 products

Electrical Power, Networking, and Controlling

Coaxial Connectors

Plugs, sockets, receptacles, and adapters to make coaxial connections

18 products

Audio Connectors

Plugs, sockets, receptacles, and adapters to make audio connections

15 products

Power Connectors

Plugs, sockets, receptacles, and other connectors for powering equipment

440 products

USB Sockets

Pair with plugs to make USB connections

1 product

Metric Circular Connectors

Plugs, sockets, receptacles, and adapters for equipment with metric connections

45 products

Conduit and Fittings

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

43 products

Facility and Grounds Maintenance

Faucet Spout Thread Adapters

Connect the female end of your garden hose to a faucet spout

4 products

Material Handling

Hitch-Ball Coupler Locks

Insert into the hitch-ball coupler latch or socket on your trailer to prevent theft

1 product

Swivels

Rotate loads to keep rope and chain from twisting and knotting

10 products

Building and Machinery Hardware

Hinges

Mount to doors and panels so they can swing open and closed

148 products

Mechanical Control Cables

Weave around obstructions to operate valves, throttles, and other machinery from a distance

3 products

Communication

Tag Rings

Loop onto tags to attach them to lanyards, key rings, and other objects

5 products