Plastic Push-On Caps | McMaster-Carr

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3,921 Products

Building and Machinery Hardware

Protective Caps

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

844 products

Protective Plugs

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

467 products

T-Slotted Framing End Caps

Snap onto T-slotted rail ends to cover sharp edges and keep out dust

33 products

T-Slotted Framing Seals

Fill gaps around doors and panels to keep air, dust, and liquid out of T-slotted framing structures

24 products

T-Slotted Framing Covers

Block dust and debris from entering T-slotted rails; add a wear- or slip-resistant surface

24 products

Strut Channel Framing and Fittings

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

64 products

Bolt-Together Framing and Fittings

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

1 product

Clamp-On Framing and Fittings

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

1 product

Locking-Slotted Framing and Fittings

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

1 product

Slip-On Framing and Fittings

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

13 products

Press-Fit Framing and Fittings

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

1 product

Knobs

Position, tighten, and secure fixtures and equipment

281 products

Keyhead Covers

Color-code your keys for easy identification

2 products

Hand Grips

Cover handles so they're more comfortable and secure to hold

124 products

Leveling Mount Inserts

Slip onto equipment and furniture to add threaded-stud leveling feet

81 products

Protective Feet

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

15 products

Leveling Mounts

Level machines and workbenches on uneven surfaces, reduce vibration, and protect floors

10 products

Door Drip Guards

Divert rain and snow away from door openings

3 products

Fluid Handling

Pipe Caps

Cover the ends of pipe to keep out dirt and debris

157 products

Pipe Plugs

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

184 products

Pipe Flanges

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

192 products

Pipe Fittings

Form threaded, barbed, flanged, and other types of connections between lengths of pipe

4 products

Tube End Caps

Cover the ends of tube to keep out dirt and debris

42 products

Tube End Plugs

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

116 products

Tube Fittings

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

202 products

Hose End Caps

Cover the ends of hose to keep out dirt and debris

41 products

Hose End Plugs

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

25 products

Hose Fittings

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

73 products

Hose

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

4 products

Sights

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

30 products

Breather Vents

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

36 products

Electrical

Electrical Enclosure Plugs

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

22 products

Electrical Enclosure Drains

Release moisture to keep components dry

2 products

Electrical Enclosure Vents

Attach to sealed enclosures so air can flow to equalize temperature and pressure

5 products

Electrical Enclosure Drain Vents

Prevent moisture from getting trapped inside enclosures while letting air flow through

1 product

Heat-Shrink Tubing End Caps

Seal moisture out of crimped electrical connections

26 products

Electrical-Insulating Wire Caps

Cover live wire ends to protect against shock from accidental contact

3 products

DIN Rail Caps

Guard the edges of DIN rail from damage and create a finished look

2 products

Outlet Box Covers

Enclose wiring for outlets and switches or block off unused components

18 products

Electrical Connector Caps

Protect data connectors when not in use

7 products

Electrical Adapters

Change electrical connectors to another type, size, or gender

27 products

Wire Splice Covers

Seal out dust and moisture to protect electrical connectors

3 products

Terminal Covers

Block out dirt and corrosion to protect battery terminals

18 products

Data Port Locks

Block USB or Ethernet ports from unauthorized use

9 products

Data Port Plugs

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

1 product

Electrical Connector Clips

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

4 products

Electrical Plugs

Pair with sockets or receptacles to transmit power or data

2 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

Lubricating

Grease Fitting Caps

Protect grease fittings from dirt, debris, and moisture

13 products

Fastening and Joining

Cap Nuts

Cover and protect threads while adding a finished look; also known as acorn nuts

21 products

Retaining Rings

Hold components on a shaft

12 products

Socket Retaining Rings

Secure sockets and adapters to impact tools

36 products

Safety Equipment

Hard Hats

Protect your head from falling objects

54 products

Hard Hat Cooling Pads

Soak in water to keep your head cool

3 products

Hard Hat Windsocks

Stretch over your hard hat to block wind and cold

5 products

Hard Hat Liners

Layer under your hard hat for extra warmth

7 products

Clothing Kits

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

6 products

Hair Covers

Catch stray hairs before they contaminate food

11 products

Hoods

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

13 products

Bump Caps

Guard against minor head bumps and scrapes

18 products

Face Shields

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

3 products

Bump Cap Inserts

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

4 products

Earplugs

Protect your hearing in loud environments without the bulk of earmuffs

35 products

Hats

Shield your head from sun, rain, cold, and sparks

10 products

Bicycle Helmets

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

1 product

Neck Gaiters

Protect your neck and face from cold, heat, flames, and electrical hazards

4 products

Sweatbands

Absorb sweat from your head or arms

3 products

Bearing Guards

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

20 products

Spill-Control Drain Covers

Block grates and manholes so liquid can't get in and odors can't get out

7 products

Floor Drain Plugs

Prevent oil and other spills from going down your floor drain

3 products

Containers, Storage, and Furniture

Drum Plugs

Seal drum lid openings

10 products

Drum Covers

Protect drum lids from damage and rust

8 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

Hard Hat Bags

Protect your hard hat from sunlight and other damaging elements to extend its life

1 product

Helmet Bags

Carry your helmet and shield it from scratches, dents, and rain

1 product

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

Pegboard Hook End Caps

Slide onto the end of pegboard hooks to protect items from scratches

2 products

Hard Hat Racks

Keep hard hats close at hand, but out of the way

1 product

Fabricating and Machining

Clamp Holding Screw Tips

Cover metal holding screws to protect workpieces from scratches

6 products

Vise Jaw Liners

Place over vise jaws to protect workpieces from marring

4 products

Material Handling

Conveyor Guide Mounting Rod Caps

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

7 products

Ladder Pads

Cushion the top of ladders to protect surfaces

1 product

Valve Stem Caps

Keep dust and debris out of tire valves

1 product

Pallet Load Covers

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

1 product

Heating, Ventilation, and Air Conditioning

Air Diverters

Guide air toward your workspace or deflect unwanted drafts

7 products

Duct and Duct Fittings

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

12 products

Facility and Grounds Maintenance

Rebar Caps

Brightly colored to alert workers to exposed rebar and pipe

4 products

Sink Drain Stoppers

Plug drains to fill up sinks and tubs

1 product

Sink Drains

Empty liquids from sinks into sewer lines

10 products

Faucet Hole Covers

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

1 product

Shampoo Caps

Remove contaminants from your hair with no rinsing required

2 products

Communication

Labels

Stick onto items to identify or convey information about them

17 products

Tamper-Evident Seals

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

2 products

Marking Cones

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

6 products

Measuring and Inspecting

Caliper Battery Covers

Protect the battery inside your caliper

8 products

Sealing

Drum-Plug Gaskets

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

2 products