Closure Caps | McMaster-Carr

Filter by

Material

System of Measurement

Pipe Size

Fitting Type

Shape

Thread Type

Chicago Fire Department

UN/UNF (SAE Straight)

Color

Pipe Material

For Use With

Drive Style

Fitting Connection

Plug Connection Method

Thread Size

Gender

Length

Cap Type

Pipe Schedule

Profile Shape

RoHS

Compliant with Exemptions

Not Compliant

Export Control Classification Number (ECCN)

2A992

2B999

EAR99

DFARS Specialty Metals

REACH

Maximum Pressure @ Temperature

Pressure Class

6,764 Products

Most Likely Products

Protective Plugs

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

1,011 products

Protective Caps

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

989 products

Electrical Connector Caps

Protect data connectors when not in use

78 products

Vial Caps

Take samples from vials without removing the cap

3 products

All Results

Building and Machinery Hardware

Protective Plugs

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

1,011 products

Protective Caps

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

989 products

T-Slotted Framing and Fittings

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

39 products

Strut Channel Framing and Fittings

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

48 products

Slip-On Framing and Fittings

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

25 products

Clamp-On Framing and Fittings

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

1 product

Bolt-Together Framing and Fittings

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

1 product

Press-Fit Framing and Fittings

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

2 products

Locking-Slotted Framing and Fittings

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

1 product

Electrical

Electrical Connector Caps

Protect data connectors when not in use

78 products

Data Port Plugs

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

3 products

Data Port Locks

Block USB or Ethernet ports from unauthorized use

9 products

Heat-Shrink Tubing End Caps

Seal moisture out of crimped electrical connections

26 products

Weatherheads

Bring power into buildings and protect the entry point from rain and snow

10 products

Battery Vent Caps

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

1 product

Raceway and Raceway Fittings

Route and guard wiring along indoor surfaces

18 products

Capacitor Boots

Shield capacitors and wire connections to extend their service life and reduce accidental shocks

3 products

Cold-Shrink Tubing End Caps

Seal crimped electrical connections without heat or tools to protect against moisture

4 products

Fluid Handling

Tube End Caps

Cover the ends of tube to keep out dirt and debris

375 products

Tube Fittings

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

2 products

Tube End Plugs

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

224 products

Pipe and Pipe Fittings

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

2,208 products

Hose End Plugs

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

38 products

Hose Fittings

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

77 products

Hose End Caps

Cover the ends of hose to keep out dirt and debris

155 products

Expansion Plugs

Seal pipe and tubing lines when checking for leaks

248 products

Pressure Test Fittings

Create a temporary connection point for gauges and other testing equipment

6 products

Thermocouple Connector Covers

Shield thermocouple connectors from dust and debris

1 product

Bore Sealing Plugs

Permanently seal unthreaded holes in pneumatic and hydraulic components

73 products

Containers, Storage, and Furniture

Vial Caps

Take samples from vials without removing the cap

3 products

Drum Plugs

Seal drum lid openings

19 products

Drum-Plug Caps

Access inside drums to fill them

4 products

Dust Covers

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

16 products

Fuel Caps

Seal fuel tanks on trailers, compressors, and other equipment

2 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

3 products

Heating, Ventilation, and Air Conditioning

Duct End Caps

Close off a length of duct

109 products

Air Conditioner Service Valve Caps

Seal off AC service valves to prevent refrigerant from leaking out

2 products

Material Handling

Valve Stem Caps

Keep dust and debris out of tire valves

2 products

Conveyor Guide Mounting Rod Caps

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

7 products

Fabricating and Machining

Fixture Plate Plugs

Keep chips and shavings from clogging or damaging unused holes on fixture plates in milling machines

1 product

Lubricating

Grease Fitting Caps

Protect grease fittings from dirt, debris, and moisture

14 products

Coolant Dispenser Hose and Fittings

Snap together and position to deliver coolant, oil, water, or air in any direction

2 products

Fastening and Joining

Threaded Inserts

Create new threads or repair stripped threads

1 product

Press-Fit Nuts

Push into drilled or punched holes to add threads to thin panels

2 products

Cartridge Sealing Caps

Slip over the tips of adhesive and sealant cartridges to keep contents from hardening

1 product

Standoff Caps

Create a finished look on standoffs and protect them from dirt and debris

66 products

Facility and Grounds Maintenance

Drain Cleanouts

Create an access point to inspect and clean floor drain pipelines

3 products

Faucet Hole Covers

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

2 products

Safety Equipment

Fire Hydrant Plugs

Pair with a hook-style spanner wrench to quickly seal fire hydrants and washdown equipment

3 products

Fire Hydrant Caps

Pair with a hook-style spanner wrench to quickly cover and uncover fire hydrants

4 products

Bearing Guards

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

14 products

Communication

Tamper-Evident Seals

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

2 products