Silicone Dust Caps | McMaster-Carr

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	Material Material	Show

Rubber

Silicone Rubber

	Material Material	Hide

	System of Measurement System of Measurement

Inch

	For ID For ID

	Profile Profile


Straight	Tapered

	For OD For OD

	For Shape For Shape

	Round

	Color Color

	Black		Red
	Pink		Clear
	Blue		Yellow
	White		Green
	Orange		Off-White
	Gray		Purple

	Plug Type Plug Type


Push In	Screw In

Expandable	Pull Through

	Cap Type Cap Type


Push On	Stretchable

	Maximum Temperature Maximum Temperature

250° to 499° F

500° to 999° F

	Height Height

	Inside Height Inside Height

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

DFARS Specialty Metals
COTS-Exempt

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

REACH Compliant

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

RoHS Compliant

	For Surface Type For Surface Type

Unthreaded

Threaded

	Hardness Hardness

	For Pipe Size For Pipe Size

	Flexibility Flexibility

	Flexible

	Trade Size Trade Size

00
0
1
2
3
4
5
5 1/2
6
6 1/2
7
7 1/2
8
8 1/2
9
9 1/2
10
10 1/2
11
11 1/2
12
13
13 1/2
14
15
16

	For Thread Type For Thread Type

NPT

	Flange Diameter Flange Diameter

	Pipe Size Pipe Size

234 Products

Caps and Plugs

High-Temperature Round Caps

Good for electroplating, paint baking, and powder-coating applications, these caps withstand temperatures up to 440° F or 570° F.

High-Temperature Tapered Caps

Made of silicone, these caps withstand temperatures of 450° F for electroplating, paint-baking, and powder-coating applications. All of these flexible caps are tapered to fit a variety of unthreaded and threaded objects.

Stretchable Sealing Caps

Tug on the pull tabs to stretch these caps onto the tips of bottles, beakers, flasks, and cylinders, creating an airtight seal.

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.

Flanged Pull-Through Round Plugs

Designed with a flange, these plugs protect countersunk holes during anodizing, electroplating, paint baking, and powder-coating applications. All withstand temperatures up to 600° F. Use the smaller end of the plug to pull the larger end into a through hole to form a tight seal.

Miniature Pull-Through Round Plugs

Also known as mouse tails, these tiny plugs fit through-hole IDs as small as 0.022”, 0.025", or 0.03”.

High-Temperature Pull-Through Round Plugs

Good for electroplating, paint baking, and powder-coating applications, these plugs withstand temperatures up to 600° F. To form a tight seal, use the smaller end of the plug to pull the larger end into a through hole.

High-Temperature Tapered Plugs

Good for electroplating, paint baking, and powder-coating applications, these plugs withstand temperatures up to 570° F. All are tapered to fit a range of hole diameters.

Hollow High-Temperature Tapered Plugs

The hollow construction allows these plugs to compress for a snug fit in threaded and unthreaded holes of varying diameters. Good for electroplating, paint baking, and powder-coating applications, they withstand temperatures up to 450° F.

Expandable High-Temperature Tapered Plugs

Place a plug into an opening and tighten the wing nut—the sides expand to create a seal in holes of varying diameters. Good for paint baking and powder-coating applications, these plugs withstand temperatures up to 450° F.

Food Industry Tapered Plugs

Made of FDA listed materials, these plugs are suitable for food contact. They're tapered to fit a range of hole diameters.