Masking Covers | McMaster-Carr

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Product Family

Bore Sealing Plugs

Capacitor Boots

Data Port Locks

Data Port Plugs

Fixture Plate Plugs

Protective Caps

Protective Plugs

Socket Head Screws

Stacking Caps and Targets

Tamper-Evident Seals

USB Connector Caps

System of Measurement

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"

5/64" to 11/64"

Attachment Type

Material

Stainless Steel

OD

0.053" to 0.12"

0.079" to 0.15"

0.111" to 0.177"

Shape

Color

Profile Shape

Pipe Size

Inside Height

For Use With

Precision Knives

Socket Head Screws

Hydraulic Fluid

Thread Size

Performance

Chemical Resistant

Corrosion Resistant

Flame Retardant

High Temperature

High Visibility

Impact Resistant

Tamper Resistant

Maximum Temperature

Less than 150° F

150° F to 199° F

200° F to 249° F

250° F to 499° F

500° F or greater

Height

Head Diameter

Flexibility

Head Width

RoHS

Compliant with Exemptions

REACH

Export Control Classification Number (ECCN)

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

DFARS Specialty Metals

Inside Width

0.584" to 0.68"

0.709" to 0.805"

Panel Thickness

0.016" to 0.062"

0.016" to 0.063"

0.016" to 0.125"

0.016" to 0.25"

Plug Connection Method

How can we improve?

2,330 Products

Protective Caps

Round Caps

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

Pull-Tab-Release Caps

Pull-Tab-Release Caps

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

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

Caps for Food and Beverage

Caps for Food and Beverage

Cover threads in food production and packaging areas

Square Caps

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

Screw-On Caps

Thread onto male pipe and fittings for the most secure fit

Caps for Pipe Flanges

Caps for Pipe Flanges

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

Rectangular Caps

Rectangular Caps

Slide onto rectangular parts such as levers and handles

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

Retaining Caps

Hold components in place and protect shaft ends

Hinged Caps for Screws

Hinged Caps for Screws

Flip open for frequent access to screws without misplacing the cap

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

Tear-Tab Caps

Stay securely on fittings until you rip off the tab

Caps for Hex Nuts

Caps for Hex Nuts

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

Corner Caps

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

Squeeze-Release Caps

Squeeze-Release Caps

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

Antistatic Caps

Antistatic Caps

Prevent static buildup to protect components such as semiconductors and resistors

Conductive Caps

Conductive Caps

Shield components from interference and drain static quickly

No-Spill Caps

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

90° Angle Caps

90° Angle Caps

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

Hangable Caps

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

Tethered Caps

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

Caps for Socket Head Screws

Caps for Socket Head Screws

Keep debris from clogging or damaging hex drives

Roll-Resistant Caps

Roll-Resistant Caps

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

Domed Caps

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

Tapered Cap Assortments

Tapered Cap Assortments

A variety of sizes for whatever job comes up

Tear-Tab Caps for Propane Tanks

Tear-Tab Caps for Propane Tanks

Guard propane tank valves against dents and dirt

Other Products

Protective Plugs

Protective Plugs

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

Standoff Caps

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

Bore Sealing Plugs

Bore Sealing Plugs

Permanently seal unthreaded holes in pneumatic and hydraulic components

Socket Head Screws

Socket Head Screws

With a deeper drive than flat and rounded head screws, these withstand more torque for a tighter hold

Bearing Guards

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

Fixture Plate Plugs

Fixture Plate Plugs

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

Dust Covers

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

Stacking Caps and Targets

Stacking Caps and Targets

Turn the ends of posts into stackable shelving and rack systems

Data Port Locks

Data Port Locks

Block USB or Ethernet ports from unauthorized use

Rebar Caps

Brightly colored to alert workers to exposed rebar and pipe

Capacitor Boots

Capacitor Boots

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

Data Port Plugs

Data Port Plugs

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

Knife Sheaths

Safely store knives while protecting them from damage

DIN Rail Caps

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

Tamper-Evident Seals

Tamper-Evident Seals

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

USB Connector Caps

USB Connector Caps

Shield unused USB connectors from damage, contaminants, and moisture

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