Brass Caps | McMaster-Carr

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Pipe Material

Fitting Type

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Chicago Fire Department

UN/UNF (SAE Straight)

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2B999

EAR99

DFARS Specialty Metals

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Molybdenum Disulfide Coated

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Fitting Material

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2,562 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 Fittings

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

478 products

Hose

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

48 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

16 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

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

Electrical Plugs

Pair with sockets or receptacles to transmit power or data

279 products

Electrical Sockets

Pair with plugs or receptacles to transmit power or data

192 products

Electrical Connector Caps

Protect data connectors when not in use

1 product

Wire Splices, Connectors, and Taps

Join wire and protect the connection

47 products

Electrical Connector Contacts

Crimp wire into pins and sleeves to create custom Molex or Amphenol connectors

26 products

Electrical Adapters

Change electrical connectors to another type, size, or gender

3 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

Vise Jaw Liners

Place over vise jaws to protect workpieces from marring

1 product

Fixture Plate Plugs

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

1 product

Facility and Grounds Maintenance

Sink Drains

Empty liquids from sinks into sewer lines

17 products