Hole Plugs | McMaster-Carr

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System of Measurement

ID

1/64" to 11/16"

1/64" to 23/32"

Plug Connection Method

Material

Stainless Steel

Shape

Color

Head Diameter

Panel Thickness

0.016" to 0.062"

0.016" to 0.063"

0.016" to 0.125"

0.016" to 0.25"

Pipe Size

Hole Diameter

Fitting Type

Knockout Trade Size

Thread Size

Profile Shape

OD

0.053" to 0.12"

0.079" to 0.15"

0.111" to 0.177"

Height

Overall Height

Thread Type

Chicago Fire Department

UN/UNF (SAE 45°)

UN/UNF (SAE Straight)

Knockout Diameter

7/8" to 1 9/32"

1 3/8" to 1 3/4"

For Material Thickness

0.01" to 0.031"

0.01" to 0.375"

0.03" to 0.312"

0.03" to 0.512"

0.032" to 0.125"

For Use With

Abrasive Materials

Inside Width

0.584" to 0.68"

0.709" to 0.805"

RoHS

Compliant with Exemptions

REACH

DFARS Specialty Metals

Export Control Classification Number (ECCN)

How can we improve?

9,811 Products

Protective Plugs

Tapered Plugs

One plug fits a range of diameters

Hollow Tapered Plugs

Hollow Tapered Plugs

Shaped to fit a range of diameters and compress for a snug fit

Hollow Tapered Plug Assortments

Hollow Tapered Plug Assortments

A range of sizes for plugging holes big and small

Tight-Hold Tapered Plugs

Tight-Hold Tapered Plugs

Tighten the wing nut to expand and seal

Miniature Tapered Plugs

Miniature Tapered Plugs

Block very small holes while you paint, coat, or plate parts

Pull-Tab-Release Hollow Plugs

Pull-Tab-Release Hollow Plugs

Lift and pull the tabs for easier removal than other plugs

Tapered Plugs for Food and Beverage

Tapered Plugs for Food and Beverage

Nonporous and super smooth to prevent bacteria growth

Sealing Plugs

Seal the ends of water supply lines, refrigerant lines, and HVAC compressors

Hollow Plugs

Compress for snug fit

Conductive Plugs

Conductive Plugs

Shield components from interference and drain static quickly

Antistatic Plugs

Antistatic Plugs

Prevent static buildup to protect sensitive electronics

Pull-Through Plugs

Pull-Through Plugs

Fill the entire length of through holes

Pull-Through Plugs for Countersunk Holes

Pull-Through Plugs for Countersunk Holes

Protect both the center and countersunk portions of holes with a single plug

Miniature Pull-Through Plugs

Miniature Pull-Through Plugs

Stretch through very small holes in electronic components such as circuit boards and connectors

Screw-In Plugs for Pipe and Tubing

Screw-In Plugs for Pipe and Tubing

Threaded for the most secure fit on female pipe and fittings

Vented Plugs for Pipe and Tubing

Vented Plugs for Pipe and Tubing

Tear away the tab to release pressure while coatings cure

Pull-Tab-Release Plugs

Pull-Tab-Release Plugs

Grip the tab for easier removal than other plugs

Snap-In Plugs

Press firmly into place for a tighter hold than push-in plugs

Snap-In Square Plugs

Snap-In Square Plugs

Press firmly into square holes for a tighter hold than push-in plugs

Push-In Square Plugs

Push-In Square Plugs

Close off the ends of square tubing and furniture

Metal Square Plugs

Metal Square Plugs

Tougher than plastic plugs for finishing the ends of square metal tubing

Snap-In Rectangular Plugs

Snap-In Rectangular Plugs

A tighter fit than push-in plugs for finishing the ends of posts, workstations, and furniture

Push-In Rectangular Plugs

Push-In Rectangular Plugs

Close off the ends of rectangular tubing in framing structures, furniture, and shelving

Snap-In Panel Plugs

Snap-In Panel Plugs

Close off unused wiring openings and holes in sheet metal

Metal Snap-In Panel Plugs

Metal Snap-In Panel Plugs

Toughest plugs for panels and sheet metal withstand impact and wear better than plastic

Metal Snap-In Panel Plug Assortments

Metal Snap-In Panel Plug Assortments

Fit a range of hole sizes in machine panels and sheet metal.

Locking Panel Plugs

Locking Panel Plugs

The most secure panel plugs, shaking and rattling won’t dislodge them

Vented Locking Panel Plugs

Vented Locking Panel Plugs

Release heat and fumes with plugs that stay put, even under vibration

Vented Snap-In Panel Plugs

Vented Snap-In Panel Plugs

Air circulates and permits heat and fumes to escape from machine panels

Push-In Panel Plugs

Push-In Panel Plugs

Fit tightly on both sides to fill wiring and access holes

Sealing Panel Plugs

Sealing Panel Plugs

Create a liquid-tight seal while protecting wire, cable, and tubing from sharp edges

Freeze Plugs

Permanently seal the shallow holes left during the casting process

Snap-In Plugs for Socket Head Screws

Snap-In Plugs for Socket Head Screws

Keep debris from clogging or damaging hex drives

Other Products

Electrical Enclosure Plugs

Electrical Enclosure Plugs

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

Grommets

Protect wire, cable, and cords from holes with sharp or rough edges

Bumpers

Absorb impact to protect equipment and surfaces from dents and scuffs

Expansion Plugs

Expansion Plugs

Seal pipe and tubing lines when checking for leaks

Protective Caps

Protective Caps

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

Pipe Plugs

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

Fixture Plate Plugs

Fixture Plate Plugs

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

Cord Grips

Securely connect cords to enclosures while sealing out dirt and moisture

Breather Vents

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

Electrical Enclosure Vents

Electrical Enclosure Vents

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

Bore Sealing Plugs

Bore Sealing Plugs

Permanently seal unthreaded holes in pneumatic and hydraulic components

Standoff Caps

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

Cable Entry Panels

Cable Entry Panels

Pass multiple cords into an enclosure while sealing out moisture, dust, and other contaminants

Quick-Release Pin Receptacles

Quick-Release Pin Receptacles

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

Faucet Hole Covers

Faucet Hole Covers

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

Rivets

Join materials together permanently, especially when too thin or fragile to fasten with screws

Electrical Enclosure Drains

Electrical Enclosure Drains

Release moisture to keep components dry

Data Port Plugs

Data Port Plugs

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

Electrical Connector Caps

Electrical Connector Caps

Protect data connectors when not in use

Drum Plugs

Seal drum lid openings

Tube and Tube Fittings

Tube and Tube Fittings

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

Earplugs

Protect your hearing in loud environments without the bulk of earmuffs

Pipe Caps

Cover the ends of pipe to keep out dirt and debris

Hose and Hose Fittings

Hose and Hose Fittings

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

Vibration-Damping Mounts

Vibration-Damping Mounts

Attach to machinery to reduce vibration and noise and extend service life

Data Port Locks

Data Port Locks

Block USB or Ethernet ports from unauthorized use

Shower Stoppers

Shower Stoppers

Push down to plunge and cut trapped material to prevent clogs

Electrical Connector Seals

Electrical Connector Seals

Add to the front or back of connectors to block out dust, debris, and weather

Slip-On Framing and Fittings

Slip-On Framing and Fittings

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

Heat Exchanger Plugs

Heat Exchanger Plugs

Plug leaky internal tubes in heat exchangers

Fire Hydrant Caps

Fire Hydrant Caps

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

Oil Fittings

Install in engine blocks and other machinery to pour in oil while keeping dust out

Press-Fit Nuts

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

Pressure Test Fittings

Pressure Test Fittings

Create a temporary connection point for gauges and other testing equipment

Electrical Enclosure Drain Vents

Electrical Enclosure Drain Vents

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

DIN Rail Caps

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

Retaining Rings

Retaining Rings

Hold components on a shaft

Grease Fitting Caps

Grease Fitting Caps

Protect grease fittings from dirt, debris, and moisture

Circuit Breaker Box Filler Plates

Circuit Breaker Box Filler Plates

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

Floor Drain Trap Seals

Floor Drain Trap Seals

Stop sewer gases from escaping through rarely used floor drains if the P-trap dries out

Rebar Caps

Brightly colored to alert workers to exposed rebar and pipe

Floor Drain Plugs

Floor Drain Plugs

Prevent oil and other spills from going down your floor drain

Dust Covers

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

Drum-Plug Caps

Access inside drums to fill them

Spill-Control Drain Covers

Spill-Control Drain Covers

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

Drum Locks

Secure drum lids and openings to prevent tampering

Sink Drains

Empty liquids from sinks into sewer lines

Quick-Release Pin Retaining Caps

Quick-Release Pin Retaining Caps

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

Conveyor Guide Mounting Rod Caps

Conveyor Guide Mounting Rod Caps

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

Sink Drain Stoppers

Sink Drain Stoppers

Plug drains to fill up sinks and tubs

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

Air Conditioner Service Valve Caps

Air Conditioner Service Valve Caps

Seal off AC service valves to prevent refrigerant from leaking out

Fire Stops

Prevent fire and smoke from passing through holes in fire-resistant walls and floors

Tamper-Evident Seals

Tamper-Evident Seals

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

Drain Check Valves

Drain Check Valves

Prevent water damage by placing into floor drains to stop sewer back-ups

Fire Hydrant Plugs

Fire Hydrant Plugs

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

Threaded Inserts

Threaded Inserts

Create new threads or repair stripped threads

Strut Channel Framing and Fittings

Strut Channel Framing and Fittings

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

Drain Valves

Vent air or discharge liquids to remove excess fluid from your system

Oil Cups

Instead of manually lubricating equipment, a built-in reservoir gradually delivers oil

Stacking Caps and Targets

Stacking Caps and Targets

Turn the ends of posts into stackable shelving and rack systems

Pipe Fittings

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

Heat-Shrink Tubing

Heat-Shrink Tubing

Apply heat to seal and insulate electrical wiring and connections

Electrical Connector Clips

Electrical Connector Clips

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

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