Protective Caps | McMaster-Carr

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Material

Stainless Steel

System of Measurement

Pipe Size

Shape

OD

0.053" to 0.12"

0.079" to 0.15"

0.111" to 0.177"

Color

Fitting Type

Cap Type

Screw on for Fitting

Screw on for Tubing

Inside Height

Thread Size

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"

Thread Type

Chicago Fire Department

UN/UNF (SAE 45°)

UN/UNF (SAE Straight)

Profile Shape

For Use With

Abrasive Materials

Plug Connection Method

Pipe Material

Stainless Steel

Drive Style

External 12-Point

External Octagon

External Square

Flexibility

Screw Size

Fitting Connection

Push to Connect

Quick Disconnect

RoHS

Compliant with Exemptions

Export Control Classification Number (ECCN)

DFARS Specialty Metals

REACH

Attachment Type

Worm-Drive Clamp

Length

How can we improve?

6,840 Products

Protective Caps

Round Caps

Keep dust and coatings out of threads and prevent damage during shipping and storage

Metal Round Caps

Metal Round Caps

Tougher than plastic and rubber caps for the best protection from impact and wear

Tapered Caps

One cap fits a range of diameters

Tapered Cap Assortments

Tapered Cap Assortments

A variety of sizes for whatever job comes up

Screw-On Caps

Thread onto male pipe and fittings for the most secure fit

Square Caps

Fit over the ends of square tubing, framing rails, and posts

Rectangular Caps

Rectangular Caps

Slide onto rectangular parts such as levers and handles

Pull-Tab-Release Caps

Pull-Tab-Release Caps

Grab and tug with your fingertips for easier removal than other caps

Squeeze-Release Caps

Squeeze-Release Caps

The quickest to remove, caps release instantly with a pinch of your fingers

Caps for Food and Beverage

Caps for Food and Beverage

Cover threads in food production and packaging areas

Tear-Tab Caps

Stay securely on fittings until you rip off the tab

Tear-Tab Caps for Propane Tanks

Tear-Tab Caps for Propane Tanks

Guard propane tank valves against dents and dirt

Hinged Caps for Screws

Hinged Caps for Screws

Flip open for frequent access to screws without misplacing the cap

Caps for Hex Nuts

Caps for Hex Nuts

Seal out moisture and dirt to prevent corrosion and buildup on threads

Snap-On Caps for Screws

Snap-On Caps for Screws

Conceal screw heads for a finished look that protects people and parts from getting snagged

Caps for Socket Head Screws

Caps for Socket Head Screws

Keep debris from clogging or damaging hex drives

Caps for Pipe Flanges

Caps for Pipe Flanges

Push on to avoid surface scratches and hole damage or mask while painting and coating

Snap-On Caps for Pipe Flanges

Snap-On Caps for Pipe Flanges

Align with the bolt holes and snap on to protect from damage and mask from coatings

Adhesive-Back Caps for Pipe Flanges

Adhesive-Back Caps for Pipe Flanges

Stick onto the raised face of flanges to prevent nicks and scratches

No-Spill Caps

Even if beakers, bottles, and flasks are tipped upside down, liquids stay sealed inside

Conductive Caps

Conductive Caps

Shield components from interference and drain static quickly

Antistatic Caps

Antistatic Caps

Prevent static buildup to protect components such as semiconductors and resistors

90° Angle Caps

90° Angle Caps

Enclose the raw ends of angle iron, shelving, and furniture

Corner Caps

Guard the corners of fragile or sharp materials such as glass and metal sheets

Tethered Caps

Caps connect to parts so they don’t get lost when removed

Roll-Resistant Caps

Roll-Resistant Caps

Keep shipping tubes and other round objects from rolling and being damaged

Hangable Caps

Slip over the end of handles to hang brooms, brushes, and other tools

Domed Caps

Oversized head protects people from the sharp ends of pipe, rods, and handles

Other Products

Protective Plugs

Protective Plugs

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

Heat-Shrink Tubing End Caps

Heat-Shrink Tubing End Caps

Seal moisture out of crimped electrical connections

Cap Nuts

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

Pipe Caps

Cover the ends of pipe to keep out dirt and debris

Electrical Connector Caps

Electrical Connector Caps

Protect data connectors when not in use

Conveyor Guide Mounting Rod Caps

Conveyor Guide Mounting Rod Caps

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

Electrical Enclosure Plugs

Electrical Enclosure Plugs

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

Rebar Caps

Brightly colored to alert workers to exposed rebar and pipe

Fixture Plate Plugs

Fixture Plate Plugs

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

Cold-Shrink Tubing End Caps

Cold-Shrink Tubing End Caps

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

Data Port Plugs

Data Port Plugs

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

Tube and Tube Fittings

Tube and Tube Fittings

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

Standoff Caps

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

Pipe Plugs

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

Retaining Rings

Retaining Rings

Hold components on a shaft

Air Conditioner Service Valve Caps

Air Conditioner Service Valve Caps

Seal off AC service valves to prevent refrigerant from leaking out

Quick-Release Pin Receptacles

Quick-Release Pin Receptacles

Secure quick-release pins when you don’t have a through hole

Quick-Release Pin Retaining Caps

Quick-Release Pin Retaining Caps

Hold quick-release pins in holes that are oversized or out of round

Dust Covers

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

Hose and Hose Fittings

Hose and Hose Fittings

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

Bore Sealing Plugs

Bore Sealing Plugs

Permanently seal unthreaded holes in pneumatic and hydraulic components

Bearing Guards

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

Knife Sheaths

Safely store knives while protecting them from damage

Data Port Locks

Data Port Locks

Block USB or Ethernet ports from unauthorized use

Fire Hydrant Caps

Fire Hydrant Caps

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

Circuit Breaker Box Filler Plates

Circuit Breaker Box Filler Plates

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

DIN Rail Caps

Guard the edges of DIN rail from damage and create 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

Pipe Flanges

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

Syringe Caps

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

Manhole Covers

Made of cast iron to handle high-volume foot and vehicle traffic.

Stacking Caps and Targets

Stacking Caps and Targets

Turn the ends of posts into stackable shelving and rack systems

Manhole Riser Rings

Manhole Riser Rings

Raise a manhole cover to make it level with the surface

Pipe Fittings

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

Capacitor Boots

Capacitor Boots

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

Drain Cleanouts

Drain Cleanouts

Create an access point to inspect and clean floor drain pipelines

Fire Hydrant Plugs

Fire Hydrant Plugs

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

Press-Fit Nuts

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

Tamper-Evident Seals

Tamper-Evident Seals

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

Electrical Connector Clips

Electrical Connector Clips

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

Threaded Inserts

Threaded Inserts

Create new threads or repair stripped threads

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