7 1/2" OD Flanges | McMaster-Carr

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Hastelloy C276 Nickel

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Acetic Acid (White Vinegar) (5% Concentration)

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Acetic Acid (White Vinegar) (75% Concentration)

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160 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.

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.

Low-Pressure Stainless
Steel Threaded Pipe Flanges

Also known as Pressure Class 150 flanges, these corrosion-resistant flanges are designed for low-pressure pipe applications.

High-Pressure Stainless
Steel Threaded Pipe Flanges

Also known as ANSI flanges.

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.

Low-Pressure Steel Unthreaded
Pipe Flanges for Low Temperatures

Even in temperatures as low as -46°, these A350 LF2 steel flanges won’t become brittle, so they absorb impact better than other low-pressure steel flanges.

FM-Approved Low-Pressure Cast
Iron Unthreaded Pipe Flanges

FM-approved for fire protection applications, these flanges are cast iron, so they're brittle and can be quickly opened by hitting them with a sledge hammer.

High-Pressure Steel Unthreaded Pipe Flanges

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

Low-Pressure Steel Threaded Pipe Flanges

These flanges are for low-pressure applications in noncorrosive environments.

Low-Pressure Steel Threaded Pipe
Flanges for Low Temperatures

Use these Pressure Class 150 pipe flanges in low-pressure lines where temperatures drop down to -40° F.

FM-Approved Low-Pressure
Cast Iron Threaded Pipe Flanges

Suitable for use in fire-protection applications, these flanges are brittle and can be quickly opened with the strike of a sledge hammer.

Low-Pressure Galvanized
Steel Threaded Pipe Flanges

The galvanized finish on these Pressure Class 150 flanges provides fair corrosion resistance.

Medium-Pressure Steel Threaded Pipe Flanges

With better strength than our low-pressure steel flanges, these are for use in medium-pressure applications.

Aluminum Unthreaded Pipe Flanges

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

Low-Pressure Aluminum Threaded Pipe Flanges

Also known as Pressure Class 125 flanges, these are for use in low-pressure applications. Flanges are aluminum, which is lightweight with good corrosion resistance.

Low-Pressure Brass and
Bronze Threaded Pipe Flanges

Also known as Pressure Class 150 flanges, these brass flanges are designed for low-pressure applications.

Plastic Pipe and Pipe Fittings

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.

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.

UV-Resistant Polypropylene
Pipe Flanges for Chemicals

Use these polypropylene flanges in outdoor environments—they resist the damaging effects of ultraviolet light. They have the chemical resistance to stand up to acids, solvents, and other harsh substances. Bolt two same-size flanges together with a gasket to create an access point within a line. Flanges are also known as Pressure Class 150 flanges.

Easy-Access CPVC Pipe Flanges for Chemicals

The grooved ends on these flanges connect to pipe with a clamp, so you can access your chemical process line for routine maintenance. Flanges have excellent chemical resistance to withstand a variety of salt solutions, acids, and other harsh substances. They are also known as Victaulic flanges.

Fiberglass Pipe Flanges for Corrosive Chemicals

Flanges have excellent corrosion resistance to handle a wide range of acids and other highly-corrosive chemicals. Use in metal surface treating applications, plating solution lines, and other chemical process applications. They are reinforced with fiberglass layers for better strength and durability than any of our other pipe flanges for chemicals. Bolt two same-size flanges together with a gasket to create an access point within a line.

Expansion Joints with Flanged Ends

The flanged ends on these expansion joints rotate for easy bolt hole alignment during installation.

High-Temperature All-Metal
Expansion Joints with Flanged Ends

These all-metal expansion joints can handle high temperatures up to 800° F.

Chemical-Resistant Expansion
Joints with Flanged Ends

The PTFE body on these expansion joints has a super-smooth surface that stands up to corrosive chemicals.

Expansion Joints with Sealing
Flanged Ends for Metal Pipe

Expansion Joints with Sealing
Flanged Ends for Plastic Pipe

Expansion Joint Reducers with Flanged Ends

Connect different pipe sizes in your line while adding a point of flexibility between them. These expansion joints absorb movement between two connected pipes to reduce stress, vibration, and noise.

Expansion Joints with Flanged
Ends for High Vibration

These expansion joints have a double-bulb design for extra movement and vibration absorption.

Expansion Joints with Flanged
Ends for Drinking Water

The EPDM lining in these joints meets NSF/ANSI 61 standard for use with drinking water.

Tube Fittings for Metal Tubing

High-Polish Metal Quick-Clamp
Sanitary Tube Fittings

The smooth finish inside these stainless steel quick-clamp fittings makes it easy to remove product residue.

Solder-Connect Fittings for Copper Tubing

Solder these fittings to tubing for a permanent, leak-tight connection. They are also known as sweat fittings.

Hose Fittings

Metal Cam-and-Groove Hose
Couplings for Chemicals and Petroleum

Couplings are metal, which has better durability than plastic cam-and-groove hose couplings. They consist of a plug and a socket that connect and disconnect quickly. Use them if you need frequent access to a line. To connect, insert the plug into the socket and push the levers down.

Minimal-Spill Push-and-Turn
Hose Couplings for Chemicals

Quickly connect and disconnect hose lines used with a variety of chemicals, from adhesives to isopropyl alcohol and ink. Any part of these couplings that contacts fluid is made from 316 stainless steel, C-276 Hastelloy, PTFE, or fluoroelastomer to withstand the chemicals in your line.

Metal Cam-and-Groove Hose Couplings for Water

Metal cam-and-groove couplings have better durability than plastic cam-and-groove couplings.

How to Identify and Measure Fittings

Metal Pipe and Pipe Fittings

Low-Pressure Stainless SteelUnthreaded Pipe Flanges

High-Pressure Stainless SteelUnthreaded Pipe Flanges

Low-Pressure StainlessSteel Threaded Pipe Flanges

High-Pressure StainlessSteel Threaded Pipe Flanges

Low-Pressure Steel Unthreaded Pipe Flanges

Low-Pressure Steel UnthreadedPipe Flanges for Low Temperatures

FM-Approved Low-Pressure CastIron Unthreaded Pipe Flanges

High-Pressure Steel Unthreaded Pipe Flanges

Low-Pressure Steel Threaded Pipe Flanges

Low-Pressure Steel Threaded PipeFlanges for Low Temperatures

FM-Approved Low-PressureCast Iron Threaded Pipe Flanges

Low-Pressure GalvanizedSteel Threaded Pipe Flanges

Medium-Pressure Steel Threaded Pipe Flanges

Aluminum Unthreaded Pipe Flanges

Low-Pressure Aluminum Threaded Pipe Flanges

Low-Pressure Brass andBronze Threaded Pipe Flanges

Plastic Pipe and Pipe Fittings

Thick-Wall Plastic Pipe Flanges for Water

CPVC Pipe Flanges for Hot Water

UV-Resistant PolypropylenePipe Flanges for Chemicals

Easy-Access CPVC Pipe Flanges for Chemicals

Fiberglass Pipe Flanges for Corrosive Chemicals

Expansion Joints with Flanged Ends

Expansion Joints with Flanged Ends

High-Temperature All-MetalExpansion Joints with Flanged Ends

Chemical-Resistant ExpansionJoints with Flanged Ends

Expansion Joints with SealingFlanged Ends for Metal Pipe

Expansion Joints with SealingFlanged Ends for Plastic Pipe

Expansion Joint Reducers with Flanged Ends

Expansion Joints with FlangedEnds for High Vibration

Expansion Joints with FlangedEnds for Drinking Water

Tube Fittings for Metal Tubing

High-Polish Metal Quick-ClampSanitary Tube Fittings

Solder-Connect Fittings for Copper Tubing

Hose Fittings

Metal Cam-and-Groove HoseCouplings for Chemicals and Petroleum

Minimal-Spill Push-and-TurnHose Couplings for Chemicals

Metal Cam-and-Groove Hose Couplings for Water

Low-Pressure Stainless Steel
Unthreaded Pipe Flanges

High-Pressure Stainless Steel
Unthreaded Pipe Flanges

Low-Pressure Stainless
Steel Threaded Pipe Flanges

High-Pressure Stainless
Steel Threaded Pipe Flanges

Low-Pressure Steel Unthreaded
Pipe Flanges for Low Temperatures

FM-Approved Low-Pressure Cast
Iron Unthreaded Pipe Flanges

Low-Pressure Steel Threaded Pipe
Flanges for Low Temperatures

FM-Approved Low-Pressure
Cast Iron Threaded Pipe Flanges

Low-Pressure Galvanized
Steel Threaded Pipe Flanges

Low-Pressure Brass and
Bronze Threaded Pipe Flanges

UV-Resistant Polypropylene
Pipe Flanges for Chemicals

High-Temperature All-Metal
Expansion Joints with Flanged Ends

Chemical-Resistant Expansion
Joints with Flanged Ends

Expansion Joints with Sealing
Flanged Ends for Metal Pipe

Expansion Joints with Sealing
Flanged Ends for Plastic Pipe

Expansion Joints with Flanged
Ends for High Vibration

Expansion Joints with Flanged
Ends for Drinking Water

High-Polish Metal Quick-Clamp
Sanitary Tube Fittings

Metal Cam-and-Groove Hose
Couplings for Chemicals and Petroleum

Minimal-Spill Push-and-Turn
Hose Couplings for Chemicals