3/4 Plugs | McMaster-Carr

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637 Products

Fluid Handling

Pipe Plugs

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

129 products

Pipe Caps

Cover the ends of pipe to keep out dirt and debris

60 products

Pipe Flanges

Create an access point in a line by bolting two same-size flanges together with a gasket

14 products

Hose and Hose Fittings

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

91 products

Tube and Tube Fittings

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

5 products

Expansion Plugs

Seal pipe and tubing lines when checking for leaks

16 products

Breather Vents

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

9 products

Pressure Test Fittings

Create a temporary connection point for gauges and other testing equipment

4 products

Sights

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

25 products

Liquid-Level Gauges

Monitor fluid levels in containers

5 products

Corrosion-Inhibiting Rods and Pads

Protect tanks, water heaters, and heat exchangers from rust; also known as sacrificial anodes

10 products

Heating Elements

Turn electrical current into heat

13 products

Building and Machinery Hardware

Protective Plugs

Insert into holes in pipe, containers, panels, and parts to keep out debris

12 products

Protective Caps

Protect just about anything, including pipe, flanges, screws, and posts

11 products

Grommets

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

4 products

Slip-On Framing and Fittings

Insert rails into fittings and tighten screws to make guards, railings, and racks

4 products

Electrical

Electrical Enclosure Plugs

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

2 products

Cord Grips

Securely connect cords to enclosures while sealing out dirt and moisture

160 products

Containers, Storage, and Furniture

Drum Plugs

Seal drum lid openings

9 products

Drum Locks

Secure drum lids and openings to prevent tampering

2 products

Sealing

Drum Plug Gaskets

Form a tighter seal in drum openings than with a drum plug alone

3 products

Lubricating

Grease Fittings

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

1 product

Measuring and Inspecting

Plug Gauges

Verify the diameter or threads of machined holes in finished parts; also called pin gauges

7 products

Humidity-Indicating Plugs

Monitor humidity in sealed containers without opening them, protecting the inside from contamination

5 products