Flange Covers | McMaster-Carr

	Material Material

	Pipe Size Pipe Size

1/2
3/4
1
1 1/4
1 1/2
2
2 1/2
3
4
5
6
8
10
12

	Type Type


Cap	Flange

	Pressure Class Pressure Class

	For Pipe Size For Pipe Size

1/2
3/4
1
1 1/4
1 1/2
2
2 1/2
3
3 1/2
4
5
6
8
10
12
14
16
18
20

	Cap Type Cap Type


Snap On	Stretchable

Adhesive Back

	Color Color

	Red		Black
	Yellow		Orange
	Beige		White
	Brown		Light Gray
	Dark Gray		Blue
	Gray		Clear
	Green		Pink

	For OD For OD

	For Shape For Shape


Round	Rectangle

	Flange OD Flange OD

	For Pipe Material For Pipe Material

	Number of Bolt Holes Number of Bolt Holes

	Flanged Connection Surface Flanged Connection Surface


Raised	Flat

O-Ring Groove

	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

	For Pipe Schedule For Pipe Schedule

Any

	Maximum Temperature Maximum Temperature

	Bolt Circle Diameter Bolt Circle Diameter

	For Use With For Use With

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

REACH Compliant

	Maximum Steam Pressure Maximum Steam Pressure

	Flexibility Flexibility

Flexible

Rigid

	Specifications Met Specifications Met

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323 Products

How to Identify and Measure Fittings

Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.

Flange Caps

Snap these caps into flange bolt holes to safeguard pipe flanges during shipping, storing, and finishing applications. They all have a thick center pad to protect the flange opening and pipe threads from damage.

Stretchable Flange Caps

Stretch these caps over flared edges such as flanged tubing and valve handles.

Adhesive-Back Flange Caps

Stick these caps on the raised surfaces of flanges or other flat surfaces for extra protection during transport and storage.

SAE Flange Caps

Protect SAE hydraulic flanges during shipping, storing, and finishing 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.

Leak-Detecting Pipe Flange Covers

Leak-Detecting Pipe Flange Covers with pH Patch

When a tiny amount of liquid makes contact with the pH patch, it changes color to indicate a leak.

See-Through Leak-Detecting Pipe Flange Covers

The clear plastic center permits easy visual inspection.

Pipe and Pipe Fittings

Low-Pressure Steel Unthreaded Pipe Flanges

Bolt two flanges of the same size together with a gasket to create an access point in a pipe line.

High-Pressure Steel Unthreaded Pipe Flanges

Forged for extra strength, these heavy duty unthreaded flanges can withstand high-pressure applications.

Extreme-Pressure Steel Unthreaded Pipe Flanges

For excellent strength in extreme-pressure applications, choose these heavy duty Pressure Class 1500 flanges.

Low-Pressure Stainless Steel Unthreaded Pipe Flanges

Bolt two same-size flanges together with a gasket to create an access point within a pipe line.

High-Pressure Stainless Steel Unthreaded Pipe Flanges

Use these heavy duty forged flanges for high-pressure applications.

High-Pressure Stainless Steel
Unthreaded SAE Pipe Flanges

Also known as Code 61 SAE hydraulic flanges.

Aluminum Unthreaded Pipe Flanges

Use these unthreaded flanges in low-pressure applications. Also known as Pressure Class 125 flanges.

Brass and Bronze Unthreaded Pipe Flanges

Bolt these flanges to another same-size flange with a gasket to create an access point within a pipe line. They are also known as Silbraze flanges.

CPVC Pipe Flanges for Hot Water

Bolt two same-size flanges together with a gasket to create an access point within a line. They are also known as Pressure Class 150 flanges. Use in high-temperature plumbing and water supply applications up to 200° F.

Thick-Wall Plastic Pipe Flanges for Water

Bolt two same-size flanges together with a gasket to create an access point within a line. They are also known as Pressure Class 150 flanges. They have thick, strong walls to handle heavy duty industrial plumbing and water supply applications, such as water processing, waste water treatment, and irrigation.

Ultra-High-Vacuum Flanges and Fittings for Stainless Steel Tubing

Ultra-High-Vacuum Flanges and
Fittings for Stainless Steel Tubing

Create access points in ultra-high-vacuum lines or chambers by bolting two same-size flanges together with a copper gasket between them. The flanges’ sharp edges dig into the copper gasket and form an extremely tight seal, which means they handle higher vacuum pressures than other high-vacuum fittings with rubber gaskets.