Straight Flanges | McMaster-Carr

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System of Measurement

Pipe Size

Material

Compressed Non-Asbestos Synthetic Fiber

Copper

Fiberglass

Glass

Hastelloy C276 Nickel

Fitting Connection

Quick-Disconnect Clamp

Fitting Type

Pressure Class

Flanged Connection Surface

Flat

O-Ring Groove

Raised

Pipe Schedule

160

XXH

Any

Number of Bolt Holes

Fitting Material

Flange OD

Pipe Material

Bolt Circle Diameter

For Use With

Shape

For Flange Pipe Size

Connects To

Specifications Met

Thread Type

UN/UNF (SAE Straight)

Flange Type

Fixed

Rotating

For Fitting Schedule

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

2A992

2B999

EAR99

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

RoHS

Compliant

Compliant with Exemptions

REACH

2,361 Products

About Pipe and Fittings

Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.

Pipe and Fittings

Stainless Steel Unthreaded Pipe and Fittings

Low-Pressure Stainless Steel Unthreaded Pipe Flanges

Create an access point in lines up to 230 psi

204 products

High-Pressure Stainless Steel Unthreaded Pipe Flanges

Create an access point in lines up to 1,200 psi; also known as Class 300 or Class 600 flanges

113 products

SAE High-Pressure Stainless Steel Unthreaded Pipe Flanges

Add an access point in hydraulic lines up to 5,000 psi; also known as Code 61 SAE hydraulic flanges

8 products

Iron and Steel Unthreaded Pipe and Fittings

Low-Pressure Iron and Steel Unthreaded Pipe Flanges

Create an access point in lines up to 230 psi

107 products

High-Pressure Iron and Steel Unthreaded Pipe Flanges

Create an access point in lines up to 1,400 psi; also known as Class 300 or Class 600 flanges

77 products

Extreme-Pressure Iron and Steel Unthreaded Pipe Flanges

Create an access point in extreme-pressure lines; also known as Class 1500 flanges

10 products

SAE High-Pressure Iron and Steel Unthreaded Pipe Flanges

Add an access point in hydraulic lines up to 3,000 psi; also known as Code 61 SAE hydraulic flanges

10 products

Stainless Steel Threaded Pipe and Fittings

Low-Pressure Stainless Steel Threaded Pipe Flanges

Create an access point in lines up to 290 psi; also known as Class 150 flanges

98 products

High-Pressure Stainless Steel Threaded Pipe Flanges

Create an access point in lines up to 1,200 psi; also known as Class 300 or Class 600 flanges

34 products

SAE High-Pressure Stainless Steel Threaded Two-Piece Pipe Flanges

Pair with an adapter for a custom access point in hydraulic lines up to 5,000 psi

14 products

Low-Pressure Stainless Steel Threaded Pipe Fittings

For pressures up to 500 psi

11 products

SAE High-Pressure Stainless Steel Threaded Pipe Flanges

Add an access point in high-pressure hydraulic lines; also known as Code 61 SAE hydraulic flanges

9 products

Plastic Pipe and Fittings

Thick-Wall Plastic Pipe Flanges for Water

Create an access point in high-pressure water supply lines; also known as Class 150 flanges

72 products

CPVC Pipe Flanges for Chemicals

Add an access point to lines that withstand chemicals; also known as Class 150 flanges

52 products

UV-Resistant Polypropylene Pipe Flanges for Chemicals

Add an access point to lines that withstand sunlight and chemicals; also known as Class 150 flanges

9 products

High-Purity Polypropylene Pipe Flanges for Drinking Water

Add an access point to lines that won't leach contaminants; also known as Class 150 flanges

10 products

Easy-Access CPVC Pipe Flanges for Chemicals

Connect to pipe with a clamp for quick access to chemical-process lines; known as Victaulic flanges

3 products

Flame-Retardant PVDF Pipe Flanges for Harsh Chemicals

Add an access point to lines that resist spreading fire and withstand harsh chemicals

6 products

High-Temperature PTFE Pipe Flanges for Harsh Chemicals

Add an access point in high-temperature chemical-process lines; also known as Class 150 flanges

4 products

Spin-Weld Plastic Pipe Fittings for Water

Melt into plastic tanks, walls, and panels for a leak-free connection without gaskets or sealants

14 products

Fiberglass Pipe Flanges for Chemicals

Create an access point in heavy duty chemical-process lines, such as for plating solution

6 products

Iron and Steel Threaded Pipe and Fittings

Low-Pressure Iron and Steel Threaded Pipe Flanges

Create an access point in lines up to 285 psi; also known as Class 150 flanges

70 products

High-Pressure Iron and Steel Threaded Pipe Flanges

Create an access point in lines up to 1,400 psi; also known as Class 300 or Class 600 flanges

17 products

Low-Pressure Iron and Steel Threaded Pipe Fittings

For pressures up to 300 psi

94 products

FM-Approved Low-Pressure Iron and Steel Threaded Pipe Flanges

Add an access point to fire water mains and sprinkler systems

16 products

Extreme-Pressure Iron and Steel Threaded Pipe Flanges

Create an access point in extreme-pressure lines; also known as Class 1500 flanges

8 products

SAE High-Pressure Iron and Steel Threaded Pipe Flanges

Add an access point in hydraulic lines up to 3,000 psi; also known as Code 61 SAE hydraulic flanges

14 products

SAE High-Pressure Iron and Steel Threaded Two-Piece Pipe Flanges

Pair with an adapter to build a custom access point in hydraulic lines up to 3,000 psi

9 products

SAE Extreme-Pressure Iron and Steel Threaded Two-Piece Pipe Flanges

Pair with an adapter for a custom access point in hydraulic lines up to 6,000 psi

12 products

Aluminum Unthreaded Pipe and Fittings

Low-Pressure Aluminum Unthreaded Pipe Flanges

Create an access point in lines up to 150 psi; also known as Class 125 flanges

22 products

Galvanized Iron and Steel Threaded Pipe and Fittings

Low-Pressure Galvanized Iron and Steel Threaded Pipe Flanges

Create an access point in lines up to 285 psi; also known as Class 150 flanges

13 products

High-Pressure Galvanized Iron and Steel Threaded Pipe Flanges

Create an access point in high-pressure lines; also known as Class 300 flanges

7 products

Aluminum Threaded Pipe and Fittings

Low-Pressure Aluminum Threaded Pipe Flanges

Create an access point in lines up to 150 psi; also known as Class 125 flanges

21 products

Low-Pressure Aluminum Threaded Pipe Fittings

For pressures up to 250 psi

58 products

Medium-Pressure Aluminum Threaded Pipe Fittings

For pressures up to 1,000 psi

8 products

Brass and Bronze Threaded Pipe and Fittings

Low-Pressure Brass and Bronze Threaded Pipe Flanges

Create an access point in lines up to 225 psi; also known as Class 150 flanges

14 products

Drain, Waste, and Vent Pipe and Fittings

Drain, Waste, and Vent Standard-Wall PVC Pipe Flanges for Water

Create an access point in gravity-flow drain, waste, and vent lines; also known as Schedule 40

4 products

Drain, Waste, and Vent ABS Pipe Flanges for Chemicals

Add an access point in gravity-flow chemical-waste systems

4 products

Brass and Bronze Unthreaded Pipe and Fittings

Low-Pressure Brass and Bronze Unthreaded Pipe Flanges

Create an access point in lines up to 225 psi; also known as Silbraze flanges

10 products

Other Products

Tube Fittings

Make threaded, push to connect, barbed, and other types of connections between lengths of tube

335 products

Pipe Stub Ends

Connect a pipe flange to a pipe without needing to weld it in place

154 products

Duct and Fittings

Circulate air through HVAC systems using round, rectangular, and fabric duct

235 products

Hose Fittings

Create threaded, barbed, quick-disconnect, and other types of connections between lengths of hose

26 products

Pipe Expansion Joints

Reduce stress, vibration, and noise in piping systems by absorbing movement

152 products

Orifice Valves

Restrict the flow of liquids and gases to precisely control rate and pressure

24 products

Diffuser Collars

Connect diffusers to duct

4 products

Pipe Locknuts

Thread onto the male end of a pipe fitting so it won't loosen from vibration

65 products

Pipe Bleed Rings

Access inside a pipe line to vent pressure, drain liquid, and take samples

22 products

Chimney Storm Collars

Pair with chimney roof flashing to prevent leaks where chimneys pass through roofs

8 products