Plastic Caps | McMaster-Carr

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2,511 Products

Building and Machinery Hardware

Protective Caps

Protective Caps

Cover holes at the end of pipe, conduit, and fittings to keep out debris

Protective Plugs

Protective Plugs

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

T-Slotted Framing and Fittings

T-Slotted Framing and Fittings

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

Press-Fit Framing and Fittings

Press-Fit Framing and Fittings

Set up temporary partitions, guards, and displays using only a hammer

Strut Channel Framing and Fittings

Strut Channel Framing and Fittings

Secure fittings in the U-shaped channel to route conduit and pipe or build other structures

Clamp-On Framing and Fittings

Clamp-On Framing and Fittings

Two-piece fittings let you modify assembly stations, conveyors, and racks without dismantling them

Slip-On Framing and Fittings

Slip-On Framing and Fittings

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

Bolt-Together Framing and Fittings

Bolt-Together Framing and Fittings

Fasten through equally spaced holes to build and adjust guards, tables, and racks

Locking-Slotted Framing and Fittings

Locking-Slotted Framing and Fittings

Make platforms, bases, and other structures that stand up to more movement than T-slotted framing

Protective Feet

Protective Feet

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

Fluid Handling

Pipe and Pipe Fittings

Pipe and Pipe Fittings

Generally thicker and more rigid than tubing for distributing liquids and gases through your facility

Tube and Tube Fittings

Tube and Tube Fittings

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

Hose and Hose Fittings

Hose and Hose Fittings

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

Electrical

Electrical Enclosure Plugs

Electrical Enclosure Plugs

Cover unused holes in enclosures to keep out dust, dirt, and moisture

Heat-Shrink Tubing End Caps

Heat-Shrink Tubing End Caps

Seal moisture out of crimped electrical connections

Electrical Connector Caps

Electrical Connector Caps

Protect data connectors when not in use

Electrical Connector Clips

Electrical Connector Clips

Attach to data connectors to lock them in place, repair them, or color code them

Battery Vent Caps

Battery Vent Caps

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

Circuit Breaker Box Filler Plates

Circuit Breaker Box Filler Plates

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

Material Handling

Valve Stem Caps

Valve Stem Caps

Keep dust and debris out of tire valves

Conveyor Guide Mounting Rod Caps

Conveyor Guide Mounting Rod Caps

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

Pallet Load Covers

Pallet Load Covers

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

Ladder Pads

Cushion the top of ladders to protect surfaces

Containers, Storage, and Furniture

Dust Covers

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

Drum Plugs

Seal drum lid openings

Drum Covers

Protect drum lids from damage and rust

Pail Lids

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

Vial Caps

Take samples from vials without removing the cap

Safety Equipment

Bearing Guards

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

Bump Cap Inserts

Bump Cap Inserts

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

Hard Hats

Protect your head from falling objects

Bump Caps

Guard against minor head bumps and scrapes

Face Shields

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

Clothing Kits

Prevent arc-flash burns with a hard hat, face shield, safety glasses, and other gear all in one bag

Fabricating and Machining

Clamp Holding Screw Tips

Clamp Holding Screw Tips

Cover metal holding screws to protect workpieces from scratches

Vise Jaw Liners

Vise Jaw Liners

Place over vise jaws to protect workpieces from marring

Fastening and Joining

Retaining Rings

Retaining Rings

Hold components on a shaft

Lubricating

Grease Fitting Caps

Grease Fitting Caps

Protect grease fittings from dirt, debris, and moisture

Heating, Ventilation, and Air Conditioning

Duct and Duct Fittings

Duct and Duct Fittings

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

Sealing

Drum-Plug Gaskets

Drum-Plug Gaskets

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

Communication

Tamper-Evident Seals

Tamper-Evident Seals

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

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)