Square Tube Plugs | McMaster-Carr

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	For Shape For Shape


Square	Round

Rectangle

	Drive Style Drive Style

	External Square

	System of Measurement System of Measurement

Inch

Metric

	For Inside Width For Inside Width

	For Inside Length For Inside Length

	Head Width Head Width

	Material Material

	Plug Type Plug Type


Snap In	Push In

Screw In

	Head Length Head Length

	Height Height

	Color Color

	Black		Clear
	Green		Silver
	Red		White
	Blue		Yellow
	Pink

	For Post Width For Post Width

1 1/2"

1 3/4"

2 1/2"

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	Maximum Temperature Maximum Temperature

	For Outside Width For Outside Width

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Component Component

Stacking Cap

Target

	Hardness Hardness

	Cap Type Cap Type


Push On	Weld On

Stretchable	Shrink Fit

	Overall Width Overall Width

	For Post Depth For Post Depth

1 1/2"

1 3/4"

2 1/2"

	End Type End Type

Plug

Socket

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153 Products

T-Slotted Framing Outlet Strips

Add electrical outlets to workstations with these outlet strips that mount on T-slotted rails.

Plugs

Snap-In Square Plugs

Flexible ridges or straps hold these plugs in place.

Push-In Square Plugs

Push these plugs into an opening and friction holds them in place.

Metal Square Plugs

More durable than plastic plugs, these provide the most protection from abrasion and impact. Use them to eliminate sharp edges and create a finished look on metal fence and machine-guard posts. Drive them in place with a hammer for a secure fit.

Domed Square Plugs

Often used on metal furniture, these plugs provide a finished look on posts and tubes. Snap them into place and their flexible ridges will provide a secure grip.

Threaded Round Plugs for NPT Pipe

Protect internally threaded NPT connections from contaminants during fabrication and storage.

High-Temperature Round Plugs for NPT Pipe

These plugs withstand temperatures up to 600° F to protect internally threaded NPT connections from contaminants during electropainting, paint baking, and powder coating applications.

Caps

Square Caps

Slide these flexible vinyl caps on and they conform for a snug fit.

Heavy Duty Square Caps

Made of rigid plastic, these caps are more wear resistant than vinyl caps but not as flexible.

Stretchable Elastic Caps

Similar to a shower cap, these caps have an elastic band that allows them to stretch and cover a variety of shapes in a range of sizes.

Heat-Shrink Round Caps

Permanently seal pipe, tubing, conduit, and even crimped electrical connections. Slide these flexible caps on and use a heat gun to tightly shrink them to the shape of whatever they are covering. Their outer surface shrinks while the inner wall flows into voids to create a sealed connection.

Stacking Caps and Targets

Weld these caps and targets to the ends of posts to create stackable shelving and racking systems.