Closure Caps | McMaster-Carr

Filter by

Product Family

Air Conditioner Service Valve Caps

Battery Vent Caps

Bolt-Together Framing and Fittings

Bore Sealing Plugs

Capacitor Boots

Cartridge Sealing Caps

Clamp-On Framing and Fittings

Coaxial Connector Caps

Cold-Shrink Tubing End Caps

Conveyor Guide Mounting Rod Caps

Coolant Hose and Fittings

Data Port Locks

Data Port Plugs

Drain Cleanouts

Duct and Fittings

Material

Stainless Steel

System of Measurement

Pipe Size

Fitting Type

Shape

Thread Type

Chicago Fire Department

UN/UNF (SAE 45°)

ID

0.022" to 0.079"

0.025" to 0.08"

0.03" to 0.083"

3/64" to 13/64"

1/16" to 11/64"

1/16" to 13/64"

For Use With

Abrasive Materials

Pharmaceuticals

Precision Knives

Color

OD

0.053" to 0.12"

0.079" to 0.15"

0.111" to 0.177"

Attachment Type

Worm-Drive Clamp

Drive Style

External 12-Point

External Octagon

External Square

Thread Size

Pipe Material

Stainless Steel

Gender

Profile Shape

Length

Pipe Schedule

RoHS

Compliant with Exemptions

REACH

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

Export Control Classification Number (ECCN)

DFARS Specialty Metals

Pressure Class

Maximum Pressure @ Temperature

30 psi @ 72° F

35 psi @ 72° F

40 psi @ 72° F

45 psi @ 72° F

50 psi @ 72° F

60 psi @ 72° F

70 psi @ 72° F

75 psi @ 72° F

80 psi @ 72° F

90 psi @ 72° F

100 psi @ 72° F

110 psi @ 72° F

120 psi @ 72° F

125 psi @ 72° F

130 psi @ 72° F

140 psi @ 72° F

150 psi @ 72° F

How can we improve?

7,157 Products

Building and Machinery Hardware

Protective Plugs

Protective Plugs

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

Protective Caps

Protective Caps

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

T-Slotted Framing End Caps

T-Slotted Framing End Caps

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

Strut Channel Plugs

Strut Channel Plugs

Plug strut channel ends to protect from sharp edges

Slip-On Framing End Caps

Slip-On Framing End Caps

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

Press-Fit Framing End Caps

Press-Fit Framing End Caps

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

Clamp-On Framing End Caps

Clamp-On Framing End Caps

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

Locking-Slotted Framing End Caps

Locking-Slotted Framing End Caps

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

Bolt-Together Framing End Caps

Bolt-Together Framing End Caps

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

Electrical Power, Networking, and Controlling

Power Connector Caps

Power Connector Caps

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

Mini Connector Caps

Mini Connector Caps

Shield mini connectors when they're not in use

Metric Circular Connector Caps

Metric Circular Connector Caps

Keep metric circular connectors safe when they're not in use

RJ45 Connector Caps

RJ45 Connector Caps

Protect sockets and maintain the IP67 rating when not in use

Coaxial Connector Caps

Coaxial Connector Caps

Terminate the end of an unused coaxial cable

USB Connector Caps

USB Connector Caps

Shield unused USB connectors from damage, contaminants, and moisture

Mil. Spec. Connector Caps

Mil. Spec. Connector Caps

Protect Mil. Spec. connectors when they're not in use

Data Port Locks

Data Port Locks

Block USB or Ethernet ports from unauthorized use

Data Port Plugs

Data Port Plugs

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

Battery Vent Caps

Battery Vent Caps

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

Capacitor Boots

Capacitor Boots

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

Heat-Shrink Tubing End Caps

Heat-Shrink Tubing End Caps

Seal moisture out of crimped electrical connections

Weatherheads

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

Cold-Shrink Tubing End Caps

Cold-Shrink Tubing End Caps

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

Raceway Caps

Close off the end of a run to keep out dust and debris

Fluid Handling

Pipe and Fittings

Pipe and Fittings

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

Hose Fittings

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

Tube Fittings

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

Expansion Plugs

Expansion Plugs

Seal pipe and tubing lines when checking for leaks

Bore Sealing Plugs

Bore Sealing Plugs

Permanently seal unthreaded holes in pneumatic and hydraulic components

Thermocouple Connector Covers

Thermocouple Connector Covers

Shield thermocouple connectors from dust and debris

Pressure Test Plugs

Pressure Test Plugs

Tighten onto equipment to check pressure without permanently installing a gauge

Safety Equipment

Fire Hydrant Plugs

Fire Hydrant Plugs

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

Fire Hydrant Caps

Fire Hydrant Caps

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

Bearing Guards

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

Containers, Storage, and Furniture

Drum Plug Caps

Access inside drums to fill them

Drum Plugs

Seal drum lid openings

Dust Covers

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

Vial Caps

Take samples from vials without removing the cap

Fuel Caps

Seal fuel tanks on trailers, compressors, and other equipment

Syringe Caps

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

Knife Sheaths

Safely store knives while protecting them from damage

Fabricating and Machining

Fixture Plate Plugs

Fixture Plate Plugs

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

Lubricating

Grease Fitting Caps

Grease Fitting Caps

Protect grease fittings from dirt, debris, and moisture

Coolant Hose and Fittings

Coolant Hose and Fittings

Build a custom system to deliver coolant, cutting oil, water, or air in any direction

Fastening and Joining

Threaded Inserts

Threaded Inserts

Create new threads or repair stripped threads

Press-Fit Nuts

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

Cartridge Sealing Caps

Cartridge Sealing Caps

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

Standoff Caps

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

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

Facility and Grounds Maintenance

Drain Cleanouts

Drain Cleanouts

Create an access point to inspect and clean floor drain pipelines

Faucet Hole Covers

Faucet Hole Covers

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

Heating, Ventilation, and Air Conditioning

Air Conditioner Service Valve Caps

Air Conditioner Service Valve Caps

Seal off AC service valves to prevent refrigerant from leaking out

Duct End Caps

Close off a length of duct

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.)