Plastic Caps | McMaster-Carr

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Product Family

Battery Vent Caps

Bearing Guards

Bicycle Helmets

Bolt-Together Framing and Fittings

Bump Cap Inserts

Bump Caps

Circuit Breaker Box Filler Plates

Clamp Holding Screw Tips

Clamp-On Framing and Fittings

Clothing Kits

Conveyor Guide Mounting Rod Caps

Attachment Type

Shape

Color

Glow-in-the-Dark Green

System of Measurement

Material

Pipe Size

Profile Shape

For Use With

Inside Height

Fitting Type

Thread Size

Head Width

Head Diameter

Inside Width

Flexibility

Performance

Panel Thickness

Head Length

REACH

RoHS

Compliant with Exemptions

Not Compliant

Export Control Classification Number (ECCN)

2B999

EAR99

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

Yes

DFARS Specialty Metals

Thread Type

2,886 Products

Building and Machinery Hardware

Protective Caps

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

845 products

Protective Plugs

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

467 products

Press-Fit Framing End Caps

Push into press-fit rails for a finished look that keeps out debris

1 product

Bolt-Together Framing End Caps

Cover the rough ends of bolt-together framing rails for a finished look

1 product

T-Slotted Framing and Fittings

The most versatile system, attach fittings along the continuous slots to build virtually anything

81 products

Locking-Slotted Framing End Caps

Snap onto locking-slotted rails to protect the ends and keep out dust and grime

1 product

Slip-On Framing End Caps

Cover the rough ends of slip-on framing rails for a finished look

11 products

Clamp-On Framing End Caps

Fit into the end of clamp-on framing rails to use as a cover or foot

1 product

Protective Feet

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

94 products

Fluid Handling

Pipe and Fittings

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

521 products

Pipe Traps

Create a seal that prevents the backflow of gas

6 products

Tube Fittings

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

307 products

Hose Fittings

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

91 products

Expansion Plugs

Seal pipe and tubing lines when checking for leaks

8 products

Electrical Power, Networking, and Controlling

Electrical Enclosure Plugs

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

13 products

Heat-Shrink Tubing End Caps

Seal moisture out of crimped electrical connections

22 products

USB Connector Caps

Shield unused USB connectors from damage, contaminants, and moisture

3 products

Power Connector Caps

Cover pin-and-sleeve power connectors when they're not in use

4 products

RJ45 Connector Caps

Protect sockets and maintain the IP67 rating when not in use

1 product

RJ45 Connector Repair Clips

Snap onto broken Ethernet plugs to restore their ability to make secure connections

1 product

RJ45 Connector Security Clips

Lock Ethernet cords in place to prevent unauthorized removal from ports

3 products

Data Port Plugs

Keep dust, debris, and moisture out of unused computer ports

1 product

Data Port Locks

Block USB or Ethernet ports from unauthorized use

9 products

Battery Vent Caps

Flip open to check water levels and fill wet-cell batteries

1 product

Circuit Breaker Box Filler Plates

Conceal live electrical components in circuit breaker boxes to prevent injury and damage

2 products

Material Handling

Conveyor Guide Mounting Rod Caps

Cover the ends of conveyor guide mounting rods for a finished look

7 products

Valve Stem Caps

Keep dust and debris out of tire valves

1 product

Ladder Pads

Cushion the top of ladders to protect surfaces

1 product

Pallet Load Covers

Fit over boxes on pallets to shield the tops and edges from strapping gouges and impact

3 products

Containers, Storage, and Furniture

Drum Plugs

Seal drum lid openings

18 products

Dust Covers

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

16 products

Pail Lids

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

2 products

Vial Caps

Take samples from vials without removing the cap

15 products

Drum Covers

Protect drum lids from damage and rust

8 products

Syringe Caps

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

13 products

Knife Sheaths

Safely store knives while protecting them from damage

7 products

Safety Equipment

Bearing Guards

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

20 products

Bicycle Helmets

A multi-directional impact protection system (MIPS) reduces injury risk

1 product

Hard Hats

Protect your head from falling objects

90 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

4 products

Clothing Kits

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

3 products

Bump Cap Inserts

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

4 products

Heating, Ventilation, and Air Conditioning

Duct and Fittings

Circulate air through HVAC systems using round, rectangular, and fabric duct

12 products

Fabricating and Machining

Clamp Holding Screw Tips

Cover metal holding screws to protect workpieces from scratches

2 products

Vise Jaw Liners

Place over vise jaws to protect workpieces from marring

4 products

Facility and Grounds Maintenance

Faucet Hole Covers

Close off unused faucet holes intended for soap dispensers and side sprayers

1 product

Rebar Caps

Brightly colored to alert workers to exposed rebar and pipe

4 products

Lubricating

Grease Fitting Caps

Protect grease fittings from dirt, debris, and moisture

13 products

Communication

Tamper-Evident Seals

Secure hasps, latches, and other connections to visibly indicate tampering

34 products

Sealing

Drum Plug Gaskets

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

7 products