Brass Plugs | McMaster-Carr

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3,213 Products

Fluid Handling

Pipe Plugs

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

299 products

Pipe Caps

Cover the ends of pipe to keep out dirt and debris

76 products

Pipe Flanges

Bolt together with a gasket to create an access point within a line

2 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

229 products

Hose End Caps

Cover the ends of hose to keep out dirt and debris

38 products

Tube Fittings

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

237 products

Expansion Plugs

Seal pipe and tubing lines when checking for leaks

74 products

Drain Valves

Vent air or discharge liquids to remove excess fluid from your system

64 products

Breather Vents

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

28 products

Pressure Test Plugs

Tighten onto equipment to check pressure without permanently installing a gauge

4 products

Heat Exchanger Plugs

Plug leaky internal tubes in heat exchangers

17 products

Heating Elements

Turn electrical current into heat

37 products

Sights

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

63 products

Electrical Power, Networking, and Controlling

Power Connectors

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

508 products

Molex Connectors

Plugs, sockets, and housings for making Molex connections

91 products

Coaxial Connectors

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

15 products

Audio Connectors

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

15 products

AMP Connectors

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

42 products

Metric Circular Connectors

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

61 products

CB Radio Connectors

Sockets and receptacles to connect CB radios

2 products

Amphenol Connectors

Attach wires to a circuit board

16 products

DMX Connectors

Replace damaged plugs and sockets on lighting cables

2 products

Coaxial Connector Caps

Terminate the end of an unused coaxial cable

1 product

USB Sockets

Pair with plugs to make USB connections

1 product

Binding Posts

Test circuits before making permanent connections

13 products

Extension Cords

Extend the reach of power from an outlet

21 products

Metric Circular Cords

Send power and signal to equipment with metric connections

10 products

Power Cords

Connect equipment and devices to a power source

2 products

Ethernet Cords

Send data between computers, printers, servers, and switches

3 products

Terminals

Attach wire endings everywhere from circuit breaker panels to batteries

35 products

Welding Cable Connectors

Plugs and sockets to deliver power to welding cable

13 products

Terminal Blocks

Create tidy rows of wire connections that you can identify, test, and adjust on the spot

6 products

Electrical Enclosure Plugs

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

10 products

Cord Grips

Securely connect cords to enclosures while sealing out dirt and moisture

80 products

Cable Entry Panels

Pass multiple cords into an enclosure while sealing out moisture, dust, and other contaminants

5 products

Jumper Cords

Ready to connect with a terminal at one or both ends

9 products

Circuit Board Connectors

Connect flat flexible cable to circuit boards

10 products

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

Oil Fittings

Install in engine blocks and other machinery to pour in oil while keeping dust out

1 product

Grease Fitting Junction Blocks

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

2 products

Measuring and Inspecting

Test Lead Adapters

Change tip styles to take different measurements with the same test leads

4 products

BNC Adapters

Convert a BNC cord to a double banana connector so it can be used with electrical testers

5 products

Test Leads

Pair with electrical testers such as multimeters to analyze your devices

11 products

Fastening and Joining

Threaded Inserts

Create new threads or repair stripped threads

531 products

Standoff Caps

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

1 product

Fabric Snaps

Join soft, heavy fabrics such as leather and canvas

44 products

Turn-Button Fastener Eyelets

Pair with turn-button fastener bases to secure fabrics to solid surfaces

3 products

Turn-Button Fastener Bases

Mate with turn-button fastener eyelets to secure fabrics to solid surfaces

6 products

Rivets

Join materials together permanently, especially when too thin or fragile to fasten with screws

5 products

Drum Plug Wrenches

Install and remove screw-in drum plugs; also known as bung wrenches

3 products

Safety Equipment

Fire Hydrant Plugs

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

3 products

Fire Hydrant Caps

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

5 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

Material Handling

Wire Rope Plugs

Secure wire rope in end fittings with a plug-lock connection

10 products

Building and Machinery Hardware

Grommets

Protect wire, cable, and cords from holes with sharp or rough edges

120 products

Leveling Mount Inserts

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

61 products

Containers, Storage, and Furniture

Drum Locks

Secure drum lids and openings to prevent tampering

2 products

Facility and Grounds Maintenance

Sink Drains

Empty liquids from sinks into sewer lines

5 products