Brass Caps | McMaster-Carr

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2,597 Products

Fluid Handling

Pipe and Fittings

Generally thicker and more rigid than tubing for distributing liquids and gases

398 products

Hose Caps

Cover the ends of hose to keep out dirt and debris

38 products

Hose Coupling Plug and Socket Sets

Include a plug and a socket for a complete hose coupling

30 products

Hose Plugs

Insert into the ends of hose to keep out dirt and debris

9 products

Hose Coupling Sockets

Pair with a plug for a complete hose coupling

310 products

Hose Coupling Plugs

Pair with a socket for a complete hose coupling

125 products

Hose Manifolds

Distribute air to multiple locations from a single supply source

4 products

Tube Fittings

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

230 products

Breather Vents

Maintain even pressure and vacuum as temperatures change by allowing airflow in tanks and enclosures

28 products

Expansion Plugs

Seal pipe and tubing lines when checking for leaks

74 products

Air Vent Valves

Eliminate air pockets from fluid lines to maintain consistent flow and prevent surges

17 products

Sights

Observe and monitor the contents of pipes, tanks, and other containers

63 products

Heat Exchanger Plugs

Plug leaky internal tubes in heat exchangers

17 products

Building and Machinery Hardware

Knobs

Position, tighten, and secure fixtures and equipment

212 products

Leveling Mount Inserts

Slip onto equipment and furniture to add threaded-stud leveling feet

61 products

Protective Feet

Add to furniture and light equipment to protect floors from scratches and wear

8 products

Safety Equipment

Fire Hydrant Caps

Pair with a hook-style spanner wrench to quickly cover and uncover fire hydrants

5 products

Fire Hydrant Plugs

Pair with a hook-style spanner wrench to quickly seal fire hydrants and washdown equipment

3 products

Electrical Power, Networking, and Controlling

Coaxial Connector Caps

Terminate the end of an unused coaxial cable

1 product

CB Radio Sockets

Pair with receptacles to connect CB radios

1 product

Coaxial Connectors

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

18 products

Power Connectors

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

347 products

Molex Connectors

Plugs, sockets, and housings for making Molex connections

91 products

Audio Connectors

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

15 products

Amphenol Connectors

Attach wires to a circuit board

16 products

USB Sockets

Pair with plugs to make USB connections

1 product

AMP Connectors

Build-your-own and ready-to-use AMP connectors

42 products

DMX Connectors

Replace damaged plugs and sockets on lighting cables

2 products

Metric Circular Connectors

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

11 products

Wire Splices, Connectors, and Taps

Join wire and protect the connection

46 products

Welding Cable Connectors

Plugs and sockets to deliver power to welding cable

13 products

Electrical Enclosure Plugs

Block or seal holes in outlet boxes and enclosures to keep out debris, dust, and moisture

10 products

Circuit Board Connectors

Connect flat flexible cable to circuit boards

10 products

Fastening and Joining

Cap Nuts

Cover and protect threads while adding a finished look; also known as acorn nuts

58 products

Standoff Caps

Create a finished look on standoffs and protect them from dirt and debris

1 product

Lubricating

Grease Fitting Adapters

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

12 products

Grease Fittings

Create an inlet on equipment and machinery for injecting lubricant; also known as Zerk fittings

31 products

Grease Fitting Junction Blocks

Send different types and amounts of grease from multiple grease fittings to lubricate several points

2 products

Heating, Ventilation, and Air Conditioning

Air Conditioner Service Valves

Tap into refrigerant lines to drain and fill your system

14 products

Material Handling

Valve Stem Caps

Keep dust and debris out of tire valves

1 product

Containers, Storage, and Furniture

Drum Locks

Secure drum lids and openings to prevent tampering

2 products

Fabricating and Machining

Fixture Plate Plugs

Keep chips and shavings from clogging or damaging unused holes on fixture plates in milling machines

1 product

Vise Jaw Liners

Place over vise jaws to protect workpieces from marring

1 product

Facility and Grounds Maintenance

Sink Drains

Empty liquids from sinks into sewer lines

17 products