Polyethylene Caps | McMaster-Carr

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Glow-in-the-Dark Green

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U.S.–Mexico–Canada Agreement (USMCA) Qualifying

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986 Products

Building and Machinery Hardware

Protective Plugs

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

289 products

Protective Caps

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

228 products

Protective Feet

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

19 products

T-Slotted Framing Wear Strips

Slide into a T-slot to provide a slippery, abrasion-resistant surface

8 products

Fluid Handling

Tube Fitting Caps

Cover the ends of tube to keep out dirt and debris

43 products

Tube Fitting Plugs

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

10 products

Tube Coupling Plugs

Pair with sockets for a complete tube coupling

90 products

Tube Coupling Plug and Socket Sets

Include a plug and a socket for a complete tube coupling

20 products

Tube Coupling Sockets

Pair with plugs for a complete tube coupling

9 products

Pipe and Fittings

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

33 products

Breather Vents

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

6 products

Containers, Storage, and Furniture

Drum Plugs

Seal drum lid openings

9 products

Dust Covers

Stretch over drums, pails, and other objects to keep out dust and debris

14 products

Drum Covers

Protect drum lids from damage and rust

8 products

Pail Lids

Replace the lid on your pail with one that quickly screws open and closed

2 products

Syringe Caps

Cover syringe tips when not in use to protect them and prevent leaks

1 product

Lubricating

Grease Fitting Caps

Protect grease fittings from dirt, debris, and moisture

13 products

Grease Fittings

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

3 products

Safety Equipment

Hair Covers

Catch stray hairs before they contaminate food

3 products

Hoods

Shield your head and neck from dirt, heat, cold, and electrical and welding sparks

3 products

Hard Hats

Protect your head from falling objects

53 products

Earplugs

Protect your hearing in loud environments without the bulk of earmuffs

4 products

Bump Cap Inserts

Tuck inside a baseball cap to protect your head from bumps and scrapes

3 products

Bump Caps

Guard against minor head bumps and scrapes

29 products

Face Shields

Protect your face from dirt, chemical splashes, and electrical and welding sparks

3 products

Clothing Kits

Head-to-toe protection from electrical arc flashes, chemical splashes, welding sparks, and more

3 products

Bearing Guards

Shield bearings from dirt, and protect fingers and tools from moving parts

6 products

Communication

Marking Cones

Designate areas for material identification, inventory control, and pallet staging

1 product

Sealing

Drum Plug Gaskets

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

2 products

Electrical Power, Networking, and Controlling

Molex Plug and Socket Sets

Come with wire leads installed for quick additions to existing Molex systems

10 products

Fabricating and Machining

Tooling Ball Covers

Protect tooling balls when not in use

1 product