Brass Caps | McMaster-Carr

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2,581 Products

Fluid Handling

Pipe and Fittings

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

360 products

Hose End Caps

Cover the ends of hose to keep out dirt and debris

38 products

Hose

Flexible and stronger than tubing; often used to convey liquids and gases under pressure

48 products

Hose Fittings

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

478 products

Tube End Caps

Cover the ends of tube to keep out dirt and debris

55 products

Tube End Plugs

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

29 products

Tube Fittings

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

147 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

CB Radio Sockets

Pair with receptacles to connect CB radios

1 product

Amphenol Connectors

Attach wires to a circuit board

16 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

299 products

Molex Connectors

Plugs, sockets, and housings for making Molex connections

91 products

Metric Circular Connectors

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

10 products

Coaxial Connectors

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

18 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

Electrical Connector Caps

Protect data connectors when not in use

1 product

Wire Splices, Connectors, and Taps

Join wire and protect the connection

46 products

Metric Circular Cords

Send power and signal to equipment with metric connections

10 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

Electrical Enclosure Drain Vents

Prevent moisture from getting trapped inside enclosures while letting air flow through

1 product

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 Fitting Junction Blocks

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

2 products

Grease Fittings

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

31 products

Material Handling

Valve Stem Caps

Keep dust and debris out of tire valves

1 product

Heating, Ventilation, and Air Conditioning

Air Conditioner Service Valves

Tap into refrigerant lines to drain and fill your system

14 products

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