Silicone Pipe Caps | McMaster-Carr

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	Material Material	Show

Rubber

Silicone Rubber

	Material Material	Hide

	System of Measurement System of Measurement

Inch

	For OD For OD

	For Shape For Shape

	Round

	Profile Profile


Straight	Tapered

	Cap Type Cap Type


Push On	Stretchable

	Color Color

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

	For ID For ID

	Plug Type Plug Type


Push In	Expandable

Screw In	Pull Through

	Maximum Temperature Maximum Temperature

250° to 499° F

500° F or greater

	Inside Height Inside Height

	Height 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

	Flexibility Flexibility

	Flexible

	Pipe Size Pipe Size

	For Surface Type For Surface Type

Unthreaded

Threaded

	For Pipe Size For Pipe Size

	Hardness Hardness

	For Thread Type For Thread Type

NPT

	For Connection Type For Connection Type

Unthreaded Pipe

Tapered-Thread Pipe

	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

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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.

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.

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”.

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.

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.

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.